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TAC I/A Series MicroNet BACnet
Smoke-Control Systems Manual
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TAC I/A Series MicroNet BACnet
Smoke-Control Systems Manual
Printed in U.S.A. 9-10 F-27419-2
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On October 1st, 2009, TAC became the Buildings Business of its parent company Schneider Electric. This document reflects the visual identity of Schneider Electric,
howev
er there remains references to TAC as a corporate brand in the body copy. As each document is updated, the body copy will be changed to reflect appropriate
corporate brand changes.
All brand names, trademarks and registered trademarks are the property of their respective owners. Information contained within this document is subject to change
without notice.
Schneider Electric
F-27419-2 September 2010 ptm
© 2010 Schneider Electric. All rights reserved.
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Table of Contents
Preface
Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Abbreviations Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Applicable Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xii
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Manual Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Chapter 1 Introduction
What is the UL 864 UUKL/UUKL7 Listing? . . . . . . . . . . . . . . . . . . . . .1-1
What Was Required to Gain the UL 864 UUKL/UUKL7 Listing? . . . . . 1-2
Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
What are Your UL 864 UUKL/UUKL7 Responsibilities? . . . . . . . . . . . . 1-3
Explanation of Smoke-Control Systems . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Building Pressurization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Dedicated and Nondedicated Systems . . . . . . . . . . . . . . . . . . . . . .1-4
Basic System Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Shaft Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Floor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
HVAC Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Smoke-Control System Activation . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Firefighter’s Smoke Control Station . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Control Sequence for Stair Pressurization Systems . . . . . . . . . . . .1-9
Control Sequence for Zoned Smoke-Control Systems . . . . . . . . . .1-9
Automatic Response To Multiple Signals . . . . . . . . . . . . . . . . . . . .1-10
Maintaining System Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Smoke-Control System Schedule . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
I/A Series MicroNet BACnet Smoke Control Manual iii
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Table of Contents
Chapter 2 High-rise Smoke Control
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Normal HVAC Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Smoke Control Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Smoke-Control System Configuration Schedule . . . . . . . . . . . . . . . . 2-20
Firefighter’s Smoke Control Station (FSCS) . . . . . . . . . . . . . . . . . . . 2-22
Location and Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Physical Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Audible Annunciation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Control Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Additional Control Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
System Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
MNB-1000 Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Ethernet/IP Infrastructure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Central System Interface and Overlay Devices . . . . . . . . . . . . 2-26
MNB-Vx Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
MS/TP Bus Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
MNB-1000 Interface to FSCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Fire Alarm Panel Interface and Remaining System Topology . . . 2-32
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Chapter 3 Warehouse Smoke Control
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Normal HVAC Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Smoke Control Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36
Smoke-Control System Configuration Schedule . . . . . . . . . . . . . . . . 3-39
Firefighter’s Smoke Control Station (FSCS) . . . . . . . . . . . . . . . . . . . 3-40
System Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Warehouse Building Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Ethernet/IP Infrastructure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41
Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-41
Central System Interface and Overlay Devices . . . . . . . . . . . . 3-41
MNB-1000 Interface to FSCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43
Fire Alarm Panel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46
Chapter 4 Campus Smoke Control
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Normal HVAC Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Smoke Control Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49
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Smoke-Control System Configuration Schedule . . . . . . . . . . . . . . . .4-53
Firefighter’s Smoke Control Station (FSCS) . . . . . . . . . . . . . . . . . . . .4-55
System Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-55
Campus Topology with MNB-1000 Controllers . . . . . . . . . . . . . . . 4-55
Ethernet/IP Infrastructure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-55
Wiring Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-56
Central System Interface and Overlay Devices . . . . . . . . . . . . . . .4-56
MNB-V2 Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-59
MS/TP Bus Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-59
MNB-1000 Interface to FSCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-61
Fire Alarm Panel Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-63
Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-63
Chapter 5 Restrictions and General Comments
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-65
Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-65
Software Access Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-65
System Overrides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-66
Approved Fire Alarm Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-67
Approved Firefighter’s Smoke Control Stations . . . . . . . . . . . . . . .5-67
Approved IP/Ethernet Infrastructure Devices . . . . . . . . . . . . . . . . . 5-71
Approved MS/TP Repeaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-72
Use of MNB-1000 IP Switch Feature . . . . . . . . . . . . . . . . . . . . . . . 5-74
Dedicated Supply Air Dampers . . . . . . . . . . . . . . . . . . . . . . . . . . .5-74
Class 2 Powered Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-75
EIA-485 Termination and Bias Resistors . . . . . . . . . . . . . . . . . . . .5-75
System Self-Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-75
Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-76
Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-76
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-77
Hardware and Firmware Upgrade Process Requirements . . . . . . .5-78
UL-1459 (Abnormal Overvoltage) Compliance . . . . . . . . . . . . . . .5-78
General Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-78
FSCS Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-78
MNB-1000 Using ADI ModBus Interface . . . . . . . . . . . . . . . . . . . .5-78
Job Estimating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-78
Spare I/O Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-80
Lost Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-80
Use of BACnet Priority Structures . . . . . . . . . . . . . . . . . . . . . . . . .5-83
Use of Transient Suppressor on MNB-300 DO . . . . . . . . . . . . . . .5-84
Multiple MNB-V1/-V2 Controllers for Pressure Summation . . . . . .5-85
VAV Zone Pressure or Position Indication . . . . . . . . . . . . . . . . . . .5-85
I/A Series BACnet Applications . . . . . . . . . . . . . . . . . . . . . . . . . . .5-85
Table of Contents
I/A Series MicroNet BACnet Smoke Control Manual v
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Table of Contents
Appendix A Additional Information
MicroNet BACnet Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Common Controller Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
MNB-300 Unitary Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
MNB-V1, MNB-V2 VAV Controllers . . . . . . . . . . . . . . . . . . . . . . . . A-4
MNB-1000 Plant Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
Input and Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Universal Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Universal Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Digital Outputs, Triac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
20 Vdc Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Inputs from MN-Sx MicroNet Sensor . . . . . . . . . . . . . . . . . . . . A-12
Velocity Pressure Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13
Communication Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14
Intermixing of Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14
Sensor Link (S-Link) Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . A-15
MicroNet MS/TP Network Wiring . . . . . . . . . . . . . . . . . . . . . . . A-15
ADI Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
Ethernet Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-16
MicroNet MS/TP Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . A-16
Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
Approved Cable Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-17
Signaling Line Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-18
ADI Wiring Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-18
I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-19
Intermixing of Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-19
Universal Inputs (UI), Universal Outputs (UO), and Digital Inputs (DI)
A-19
Power Supply Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-20
Appendix B Approved Part Numbers
Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Final Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Subassemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Third Party UUKL Listed Products . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Appendix C Applicable Documentation
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
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Table of Contents
Appendix D
References
Other Reference Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
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Table of Contents
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Preface
Preface
Purpose of this Manual
This manual is intended for use by qualified, authorized engineers and
technicians who are responsible for meeting a UL 864 UUKL/UUKL7 project
specification. The specification, created by the smoke-control system designer,
should have already considered the selected mechanical equipment design.
Proper duct sizing and layout, motor/blower selection, and damper selection must
be completed by the smoke-control system designer to provide the planned
smoke-control pressurization under all possible expected environmental (wind,
weather, etc.) and building (door, elevator hoistway, leakage, system response,
stairwell, occupied mode, etc.) conditions.
Note:
• UUKL7, which is referred to throughout this manual, is the Category Code
Number (CCN) for smoke-control system equipment certified for use in
Canada.
• Throughout this manual, all references to UUKL are intended to refer to
UUKL7 also (i.e. UUKL/UUKL7).
• Throughout this manual, all references to the MNB-V1 equally apply to the
MNB-V1-2 and all references to the MNB-V2 equally apply to the MNB-V2-2.
This manual’s purpose is to provide the fundamentals for the controls engineer
and technicians to meet a properly designed smoke-control specification. General
topologies, specific requirements, and exceptions to our published literature that
are required by Underwriters Laboratories, Inc. for UL 864 UUKL/UUKL7 are
provided. This manual does not provide guidelines for mechanical system
selection and design. Recognized smoke pressurization program models are
available for this purpose.This manual also does not cover all installation and
wiring requirements for TAC I/A Series
be used along with the I/A Series MicroNet BACnet Wiring, Networking, and Best
Practices Guide, F-27360, and applicable I/A Series BACnet controller installation
instructions.
®
MicroNet™ BACnet™ controllers. It must
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual ix
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Abbreviations Used in this Manual
ADA Americans for Disabilities Act
ADI Automation Displays, Inc.
AHJ Authority Having Jurisdiction
AHU Air Handling Unit
AI Analog Input
CCN Category Code Number (UL)
CFM Cubic Feet per Minute
DI Digital Input
DO Digital Output
EOL End of Line (Termination)
EOL JPR End-of-Line Jumper (EOL resistor and/or bias
resistor engaged through on-board jumper)
FAP Fire Alarm Panel
FSCS Firefighter’s Smoke Control Station
HVAC Heating-Ventilating-Air Conditioning
I/O Input/Output
IP Internet Protocol
ITE Information Technology Equipment
JPR Jumper
LAN Local Area Network
LED Light Emitting Diode
NEC National Electrical Code
NFPA National Fire Protection Association
N.O. Normally Open
NW Network
O.A. Outside Air
UI Universal Input
UL Underwriters Laboratories, Inc.
VAV Variable Air Volume
WP Tech WorkPlace Tech Tool
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Definitions BACnet
The following are definitions of terms related to BACnet.
Instance A device’s instance number, also known as its
Smoke Control
The following definitions of terms related to smoke control are found in
NFPA 92A, Recommended Practice for Smoke-Control Systems.
Area of Refuge An area of the building separated from other
Preface
BACnet Device Object Identifier.
spaces by fire-rated smoke barriers in which a
tenable environment is maintained for the
period of time that such areas may need to be
occupied at time of fire.
Authority Having
Jurisdiction
End Process Verification A method that provides positive confirmation
Firefighter’s Smoke
Control Station
Positive/Negative
Pressurization
Smoke Barrier A continuous membrane, either vertical or
The organization, office, or individual
responsible for approving equipment,
materials, an installation, or a procedure.
that the desired result (i.e.airflow, damper
position, etc.) has been achieved when a
controlled device has been activated, such as
during smoke control, testing, or manual
override operations, where failure or cessation
of such positive confirmation results in an
off-normal indication.
A system that provides graphical monitoring
and manual overriding capability over
smoke-control systems and equipment at
designated location(s) within the building for
the use of the fire department.
The desired pressure difference between the
protected space and an adjacent space
measured at the boundary of the protected
space under a specified set of conditions with
the smoke-control system operating.
horizontal, such as a wall, floor, or ceiling
assembly, that is designed and constructed to
restrict the movement of smoke.
Smoke Control Mode A predefined operational configuration of a
system or device for the purpose of smoke
control.
Smoke-Control System An engineered system that uses mechanical
fans to produce pressure differences across
smoke barriers to inhibit smoke movement.
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Smoke Control Zone A space within a building enclosed by smoke
barriers, including the top and bottom, that is
part of a zoned smoke-control system.
Smoke Exhaust System A mechanical or gravity system intended to
move smoke from the smoke zone to the
exterior of the building, including smoke
removal, purging, and venting systems, as
well as the function of exhaust fans utilized to
reduce the pressure in a smoke zone.
Smoke Zone The smoke-control zone in which the fire is
located.
Applicable Standards
Stairwell Pressurization
System
Tenable Environment An environment in which smoke and heat is
Zoned Smoke-Control
System
This manual should be used in conjunction with the following standards
which apply to the Schneider Electric UL 864, 9th ed. Listing.
Underwriters Laboratories (UL) Standards
A type of smoke-control system in which stair
shafts are mechanically pressurizaed, with
respect to the fire area, with outdoor air to
keep smoke from contaminating them during a
fire event.
limited or otherwise restricted to maintain the
impact on occupants to a level that is not life
threatening.
A smoke-control system that includes smoke
exhaust for the smoke zone and
pressurization for all contiguous
smoke-control zones.
• UL 864, 9th ed. (2003) Control Units for Fire Protective Signaling
Systems
• UUKL Smoke-Control System Equipment (Category under UL 864)
• CAN/ULC-S527-99 Standard For Control Units For Fire Alarm Systems
• ULC/ORD-C100-92 Smoke Control System Equipment
• UUKL7 Category for Smoke-Control System Equipment Certified for
Use in Canada
National Fire Protection Association (NFPA) Standards
• NFPA 70 National Electrical Code
• NFPA 72 National Fire Alarm Code, 2007 Edition
This standard covers the application, installation, performance, and
maintenance of protective signaling systems and their components.
• NFPA 92A Standard for Smoke-Control Systems Utilizing Barriers and
Pressure Differences, 2009 Edition
This standard covers the design, installation, testing, operation, and
maintenance of new and retrofitted mechanical air conditioning and ven-
xii TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Preface
tilation systems for the purpose of controlling smoke.
• NFPA 92B Standard for Smoke Management Systems in Malls, Atria,
and Large Areas, 2005 Edition
This standard provides technical data relevant to the design, installation,
testing, operation, and maintenance of new and retrofitted smoke management systems. It is intended for buildings having large volume
spaces, for the management of smoke within the space where the fire
exists, or between spaces not separated by smoke barriers.
Other Standards
• Canadian Electrical Code, Part 1
Conventions Used in this Manual
The following conventions apply to this printed manual:
• Menu commands appear in bold.
Example — On the Special menu, point to Security, then click Log On.
• Italics is used for emphasis in a statement, such as:
If maximum closed switch voltage is not more than 1.0 V and minimum
open switch voltage is at least 4.5 V, then solid state switches may be
used for a UI or a DI.
It is also used when referring to a document, such as:
Refer to the WorkPlace Tech Tool 5.x Engineering Guide Supplement,
F-27356.
Acrobat (PDF) Conventions
If you are reading this manual online in Adobe
numerous hypertext links exist, both in normal black text and in blue text.
®
Acrobat® (.PDF file format),
• Hypertext links in this document include all entries in the Table of
Contents, as well as cross-references within the body text. For ease of recognition, cross-reference links within the body text appear in blue type, for example Manual Summary. A link is indicated whenever the mouse pointer changes to a hand with a pointing finger.
• When viewing this guide with Adobe Acrobat, you can display various
“bookmark” links on the left side of your screen by choosing “Bookmarks
and Page” from the “View” menu. As with the links described above,
these “bookmark” links will also cause the mouse pointer to change to a
hand with a pointing finger.
Manual Summary This manual contains five chapters and two appendices.
Chapter 1 - Introduction
This chapter explains the UL 864 UUKL/UUKL7 Listing and defines various
terms related to Smoke-Control Systems.
Chapter 2 - High-rise Smoke Control
This chapter provides application guidelines for using I/A Series MicroNet
BACnet controllers in a five-floor, high-rise office building that requires the
UL 864 UUKL/UUKL7 Listing for Smoke-Control Systems.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual xiii
Page 16
Chapter 3- Warehouse Smoke Control
This chapter provides application guidelines for using I/A Series MicroNet
BACnet controllers in a single-story warehouse building that requires the
UL 864 UUKL/UUKL7 Listing for Smoke-Control Systems.
Chapter 4 - Campus Smoke Control
This chapter provides application guidelines for using I/A Series MicroNet
BACnet controllers in a large campus with multiple buildings that require the
UL 864 UUKL/UUKL7 Listing for Smoke-Control Systems.
Chapter 5 - Restrictions and General Comments
This chapter lists any restrictions associated with the application of
I/A Series MicroNet BACnet controllers to UL 864 UUKL/UUKL7
Smoke-Control Systems. This chapter also includes general comments that
may provide additional insight or flexibility during the engineering process.
Appendix A - Additional Information
Appendix A presents additional information related to the wiring of an
I/A Series MicroNet BACnet Smoke-Control System.
Appendix B - Approved Part Numbers
Appendix B lists the part numbers of all I/A Series MicroNet BACnet
equipment that have been UL 864 UUKL/UUKL7 listed.
Appendix C - Applicable Documentation
Appendix C lists, by F-number, applicable documentation that is required to
install, apply, engineer, operate, and troubleshoot I/A Series MicroNet
BACnet and related equipment.
Appendix D - References
Appendix D lists additional reference documents that are relevant to the
design of Smoke-Control Systems.
xiv TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Chapter 1
Introduction
Schneider Electric has worked with Underwriters Laboratories, Inc. to gain
the UL 864 UUKL/UUKL7 listing. This UL listing involves testing both
hardware and software for reliability by Underwriters Laboratories, Inc. as it
pertains to this standard and sub-category.
What is the UL 864 UUKL/UUKL7 Listing?
According to Underwriters Laboratories, the UL 864 UUKL/UUKL7 is a
category that has been established for Smoke-Control System Equipment.
“The products covered by this category are intended to be installed in
conjunction with heating-ventilating-air conditioning (HVAC) equipment to
form a system for controlling the flow of smoke in a building during a fire
condition in accordance with Smoke-Control Systems, NFPA 92A or 92B.”
Additionally, according to Underwriters Laboratories (UL), smoke-control
equipment is assigned one or more of the following attributes:
Note: Schneider Electric is listed for all of the following UUKL attributes.
1
1. Operation
Manual—Activation of the smoke-control system occurs as a result of
the intervention of an authorized person.
Automatic—Activation of the smoke-control system occurs as a result of
an alarm condition from a fire detection device, such as a smoke detector or heat detector, or fire alarm control unit.
2. Type
Nondedicated—A system which provides the building HVAC function
under normal conditions and provides a smoke-control objective during
a fire alarm condition.
Dedicated—A system which is normally inactive and is used exclusively
for the purpose of smoke control.
3. Use
Stairwell—Configuration of equipment which provides pressurizing of
stairwells for the purpose of maintaining a tenable environment for building egress.
1. Underwriters Laboratories, Heating, Cooling, Ventilating, Cooking and Food Safety
Equipment Directory 2006.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 1
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Chapter 1
Zoned Smoke Control—A configuration which provides the exhausting of the
smoke area and pressurizing all of the other contiguous areas of the build-
2
ing.”
The design of an overall smoke-control system is a complete system engineered
to the particular installation. The interconnection of the smoke-control equipment
to the HVAC equipment, and to other system equipment, is intended to be in
accordance with a specific installation diagram that is generated by either the
smoke-control equipment listee or by another responsible party.
In practice, Schneider Electric, as a UL Smoke Control Equipment Listee, and its
associated field offices do not design the smoke-control system. Rather, the
Schneider Electric field office works closely with the smoke-control system
designer to develop the interface between the controls and equipment supplied by
Schneider Electric and the mechanical equipment that provides smoke-control
pressurization. The Schneider Electric field office then generates the control
system installation diagrams based on the total smoke-control system design.
What Was Required to Gain the UL 864 UUKL/UUKL7 Listing?
UL 864 UUKL/UUKL7 testing has two basic elements: hardware and software.
Each element was reviewed and tested to meet the UL 864 UUKL/UUKL7
acceptance criteria.
Hardware The hardware has been designed to meet UL 864 transient testing requirements
on all communications and input/output points. This includes EIA-485 (formerly
RS-485) ports, Ethernet ports, power, and all I/O points. The result of these
modifications has been to protect the I/A Series BACnet products against high
level transients and further reduce the susceptibility of the I/A Series BACnet
controllers to static electricity and lightning. This does not mean that lightning
protection is not required. In fact, lightning protection is still required whenever
communication lines enter or leave a building.
Software A systems level application was created, documented, and tested to prove
I/A Series BACnet controllers could perform a smoke-control sequence within the
guidelines of UL 864 UUKL/UUKL7 and NFPA 92A. This systems level application
used a representative selection of I/A Series BACnet hardware. Three additional
systems applications were created to provide a guideline for applying I/A Series
BACnet controllers to generic smoke-control situations. These applications are
briefly explained here and detailed in Chapters 2 through 4.
• High-rise Smoke Control Using MNB-300, MNB-Vx, and MNB-1000
Controllers
Detailed in Chapter 2, this application provides guidelines for using I/A Series
BACnet controllers in a five-floor, high-rise office building that requires the
UL 864 UUKL/UUKL7 listing for Smoke-Control Systems. This application
performs the smoke-control sequences by controlling stairwell pressurization
2. Underwriters Laboratories, Heating, Cooling, Ventilating, Cooking and Food Safety
Equipment Directory 2006.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
2
Page 19
Introduction
systems, terminal boxes, dedicated smoke-control dampers, and central air
handling unit (AHU) systems. The normally open (N.O.) relay contacts of a
UOJZ fire alarm panel are monitored for smoke/fire alarm signals which initiate automatic activation of the smoke-control sequences. The UUKL listed
Firefighter’s Smoke Control Station (FSCS) is monitored for manual activation
and overrides. Control of the FSCS visual and audible status indicators is also
provided.
• Warehouse Smoke Control Using MNB-300 and MNB-1000 Controllers
Detailed in Chapter 3, this application provides guidelines for using I/A Series
BACnet controllers in a single-story warehouse building that requires the
UL 864 UUKL/UUKL7 listing for Smoke-Control Systems. This application
performs the smoke-control sequences by controlling several zoned AHU systems. The N.O. relay contacts of a UOJZ fire alarm panel are monitored for
smoke/fire alarm signals which initiate automatic activation of the smoke-control sequences. The UUKL listed Firefighter’s Smoke Control Station (FSCS)
is monitored for manual activation and overrides. Control of the FSCS visual
and audible status indicators is also provided.
• Campus Smoke Control Using MNB-300, MNB-Vx, and MNB-1000
Controllers
Detailed in Chapter 4, this application provides guidelines for using I/A Series
BACnet controllers in a large campus with multiple buildings that require the
UL 864 UUKL/UUKL7 listing for Smoke-Control Systems. This application
performs the smoke-control sequences by controlling terminal boxes, dedicated smoke-control dampers, and several AHU systems. The N.O. relay
contacts of a UOJZ fire alarm panel are monitored for smoke/fire alarm signals which initiate automatic activation of the smoke-control sequences. The
UUKL listed Firefighter’s Smoke Control Station (FSCS) is monitored for manual activation and overrides. Control of the FSCS visual and audible status
indicators is also provided. Multiple Fire Alarm Panels and FSCSs are used.
What are Your UL 864 UUKL/UUKL7 Responsibilities?
Schneider Electric field offices can now contract for smoke-control systems that
require the UL 864 UUKL/UUKL7 listing for a BACnet system. The I/A Series
BACnet system, however, is not the system that initiates or annunciates the
smoke/fire alarm. That is the responsibility of the primary system, a dedicated fire
alarm system that is listed for the UOJZ category of the UL 864 standard. The
primary system provides the means for detecting, indicating, and annunciating the
smoke/fire alarm. I/A Series BACnet controllers interface to the primary fire alarm
system to monitor the smoke/fire alarm panel output contacts and subsequently
control the HVAC equipment, as required, in the event of a fire/smoke condition.
In addition, the automation system may redundantly (as a secondary system)
annunciate fire/smoke alarms.
The applications produced and the guidelines provided by Schneider Electric in
the I/A Series Micronet BACnet Smoke-Control Systems Manual are intended as
a reference. They must be reviewed and revised to fit the individual installation
and the project’s specifications. It is the individual field office’s responsibility to
ensure that the I/A Series BACnet system meets the requirements of the project’s
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 3
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Chapter 1
specifications, but not necessarily to perform the system’s mechanical design
function. The smoke-control system designer should have already completed the
mechanical system design, and validated the design’s concept using a proven
smoke-control system program model.
Proper duct sizing and layout, motor/blower selection, and damper selection must
be completed by the smoke-control system designer to provide the planned
smoke-control pressurization under all possible expected environmental (wind,
weather, etc.) and building (door, elevator hoistway, leakage, system response,
stairwell, occupied mode, etc.) conditions. Adjacent corridors and zones should
have been considered by the smoke-control system designer because they have
a direct impact on pressurization.
The smoke-control system designer should also specify the required controls
sequence, and realizing that there are reaction and confirmation times for HVAC
controls, specify any critical response times that are necessary to meet the
requirements of the smoke-control system design.
Each field office is responsible for the implementation of the smoke-control
sequence as specified by the smoke-control system designer. Additionally, it is the
responsibility of the field office to work with the smoke-control system designer
and gain the smoke-control system approval from the Authority Having
Jurisdiction (AHJ) — and there could be several. I/A Series BACnet equipment
installation must be in strict adherence to the appropriate UL, NFPA, and local
authority requirements. The field office is responsible for following the installation
standards and guidelines set forth by Schneider Electric in this document and as
approved by UL.
Explanation of Smoke-Control Systems
This documentation is intended to be used in conjunction with the NFPA 92A and
UL 864 UUKL/UUKL7 standards. The explanation of smoke-control systems here
consists of highlights from these standards.
Building Pressurization
Dedicated and Nondedicated Systems
The primary means of controlling smoke movement is by creating air pressure
differences between smoke-control zones. The basic concept of building
pressurization is to establish a higher pressure in adjacent spaces than in the
smoke zone. In this way, air moves into the smoke zone from the adjacent areas
and smoke is prevented from dispersing throughout the building.
Smoke control systems are either dedicated or nondedicated. A dedicated
smoke-control system is intended for smoke-control purposes only. It is a
separate system of air moving and distribution equipment that does not function
under normal building operating conditions. When activated, this type of system
performs a specific smoke-control function.
smoke-control systems are stairwell pressurization fans and exhaust dampers
that operate only when in a smoke-control situation.
3. National Fire Protection Association, Inc., NFPA 92A, Standard for Smoke-Control
Systems Utilizing Barriers and Pressure Differences, 2009 ed., chap. 1, para. 1.2.1.
4. NFPA 92A, 2009 ed., chap 3, para. 3.3.11.1, 3.3.11.2..
4
Examples of dedicated
3
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 21
Introduction
Nondedicated smoke-control systems are systems that share components with
some other systems such as the building automation (HVAC) system. When
activated, the system changes its mode of operation to achieve the smoke-control
objectives.
building that supplies several smoke-control zones. Under normal HVAC
operation, the central air handler modulates the outdoor, exhaust, and return air
dampers to maintain a desired discharge temperature. When a smoke-control
sequence is initiated, the control objective changes from maintaining a desired
discharge temperature to a smoke-control sequence that drives the outdoor and
exhaust air dampers fully open and the return air damper fully closed to provide
the maximum amount of outdoor air.
5
An example of this type of system is the central air handler for a
Basic System Types
Building smoke-control systems can generally be divided into two basic types:
shaft protection and floor protection. Shaft protection consists of stairwell
pressurization systems and elevator hoistway systems. Floor protection involves
several variations of zoned smoke control. Use of a particular system or
combination of systems is dependent on building and fire code requirements, as
well as specific occupancy and life safety requirements of the situation being
considered.
Note: Recent trends have indicated areas of refuge are being designed into
many buildings as dictated by the Americans for Disabilities Act (ADA).
Specifications may refer to these areas of refuge which are typically located
adjacent to stairwells or elevator hoistways. These refuge zones may require
special pressure compensated systems in order to maintain a tenable
environment. The requirements for these systems must be dictated by the
building’s smoke-control system designer based on the smoke-control system
design and its associated sequence of operation. When these types of zones are
encountered, additional time and resources may be required to establish and
verify compliance to the specification. These areas of refuge are not part of the
UUKL listing requirements.
Shaft Protection
Stairwell Pressurization Systems
The goal of pressurized stairwells is to maintain “a tenable environment within exit
stairwells for the time necessary to allow occupants to exit the building.”
6
A
tenable environment is defined as “An environment in which the products of
combustion, including toxic gases, particulates, and heat, are limited or otherwise
restricted to maintain the impact on occupants to a level that is not life
threatening.”
staging area for firefighters.
pressurized, with respect to the fire area, with outdoor air to keep smoke from
contaminating them during a fire incident.”
5. NFPA 92A, 2009 ed., chap 3, para. 3.3.11.2.
6. NFPA 92A, 2009 ed., chap. 4, para. 4.1.2 (2), annex A, para. A.8.1.
7. NFPA 92A, 2009 ed., chap. 4, para 4.1.2 (2).
8. NFPA 92A, 2009 ed., annex A, para A.4.1.2 (1).
9. NFPA 92A, 2009 ed., chap 3, para 3.3.6..
7
A secondary objective of stairwell pressurization is to provide a
8
This is achieved when “stair shafts are mechanically
9
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 5
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Chapter 1
There are two types of stairwell systems: noncompensated and compensated. In
a noncompensated system, supply air is provided to the stairwell by starting a fan.
This provides two or more positive pressure differentials: one differential with all of
the doors closed, a second differential with one door open, and so on.
10
In a
compensated system, supply air is also provided to the stairwell by starting a fan,
but the fan system adjusts the positive differential pressure based on the various
combinations of opened and closed doors. This adjustment may be accomplished
by either modulating supply airflows or by relieving excess pressure from the
stairwell.
motor-operated dampers, an automatically opening stairwell door to the outside at
ground level, or an exhaust fan.
11
Typically, over-pressure relief may utilize barometric dampers,
12
Elevator Smoke Control
“Historically, elevator hoistways have proved to be a readily available conduit for
the movement of smoke throughout buildings.”
13
Although several methods for
correcting this problem have been proposed and investigated, there are no firm
recommendations regarding elevator smoke control. Refer to the NFPA 92A and
UL 864 UUKL/UUKL7 standards for additional information. Remember, the local
AHJ and project specifications may require control beyond that specified in the
above standards.
Floor Protection
Zoned Smoke Control
Pressurized stairwells, discussed above, “are intended to control smoke to the
extent that they inhibit smoke infiltration into the stairwell. However, in a building
with just a pressurized stairwell, smoke can flow through cracks in floors and
partitions and through other shafts to threaten life or damage property at locations
remote from the fire. The concept of zoned smoke control …is intended to limit
this type of smoke movement within a building.”
With zoned smoke control, smoke movement is inhibited by dividing the building
“into smoke-control zones, with each zone separated from the others by smoke
barriers.”
closed. When a fire occurs in one of these smoke-control zones, it is called a
smoke zone.
by mechanical fans and operating dampers can be used to limit the smoke to the
zone in which the fire originated.
15
These smoke barriers can be partitions, floors, or doors that can be
16
In the event of a fire, pressure differences and airflows produced
17
When a fire/smoke condition occurs, all of the
nonsmoke zones that are contiguous to the smoke zone are positively
pressurized and the smoke zone is negatively pressurized. Optionally, all of the
remaining smoke-control zones in the building may also be positively
pressurized.
18
With the smoke contained to the smoke zone, it can then be
14
10.NFPA 92A, 2009 ed., annex B, para. B.1.
11.NFPA 92A, 2009 ed., annex B, para. B.2.
12.NFPA 92A, 2009 ed., annex B, para. B.4.
13.NFPA 92A, 2009 ed., annex A, para. A.5.4.
14.NFPA 92A, 2009 ed., annex A, para. A.5.5, annex A, para. A.8.1.
15.NFPA 92A, 2009 ed., chap. 5, para. 5.5.1.1.
16.NFPA 92A, 2009 ed., chap. 3 para. 3.3.15.
17.NFPA 92A, 2009 ed., annex A, para. A.5.5.
18.NFPA 92A, 2009 ed., annex A, para. A.5.5.1.1.1.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Introduction
exhausted. Typically, the fire/smoke signals from a protective signaling
system (UOJZ, a UL 864 Listed Fire Alarm Control Unit; i.e. fire alarm panel)
are used to activate the zoned smoke-control sequence.
19
HVAC Equipment HVAC equipment normally provides a means of supplying, returning and
exhausting air to, or from, a space. Most HVAC equipment “can be adapted
to provide the necessary logic and control sequences to configure HVAC
systems for smoke control.”
ducts are interconnected as part of the normal HVAC operation, smoke
dampers are needed to separate the supply and exhaust air during a
smoke-control sequence (return air damper).
use centralized HVAC equipment in main mechanical areas to serve multiple
floors or zones. These central systems may require fire and smoke shaft
dampering to provide exhaust of the fire floor and pressurization of the
adjacent floors with outdoor air. Due to their capacity, central systems should
include a means to prohibit excessive pressures within the duct system and
prevent rupture, collapse, or other damage.
Typically, fan coil units and water source heat pump units can be excluded
from performing smoke-control sequences. However, if these units have the
ability to supply outdoor air, any of the units that are within the smoke zone
should be shut down so that the zone can be negatively pressurized.
induction-type air handling unit is used within a smoke zone, it should be
shut down or have its primary air supply closed off.
20
However, when the supply and return air
21
Additionally, some buildings
22
24
23
If an
Smoke-Control System Activation
Some VAV systems bypass supply air to the return air inlet of the fan. In
these cases, the bypasses must be closed when the unit is in the
smoke-control mode. Additionally, the VAV system fan and terminal unit
controls should be configured to supply the maximum amount of outdoor air
to pressurize the nonsmoke zones.
supplying the smoke zone, the terminal fan should be turned off. “Terminal
units serving zones adjacent to the smoke zone can continue to operate.”
25
If a fan-powered terminal unit is
26
“Operating controls of the HVAC system shall be designed or modified to
provide the smoke-control mode with the highest priority over all other
control modes.”
27
Normally the smoke-control sequences are activated
automatically, but in some cases, manual activation may be more
appropriate. In either case, “the smoke-control system shall be capable of
being manually overridden and manually deactivated.”
28
The automatic
smoke-control system “shall be automatically activated in response to
signals received from a specific fire detection device or a combination of fire
detection devices.”
19.NFPA 92A, 2009 ed., chap. 6, para. 6.4.5.1.1.
20.NFPA 92A, 2009 ed., annex A, para. A.6.4.2.
21.NFPA 92A, 2009 ed., chap. 6, para. 6.2.3.
22.NFPA 92A, 2009 ed., annex C, para. C.3.
23.NFPA 92A, 2009 ed., annex C, para. C.4.
24.NFPA 92A, 2009 ed., annex C, para. C.5.
25.NFPA 92A, 2009 ed., annex C, para. C.7.
26.NFPA 92A, 2009 ed., annex C, para. C.8.
27.NFPA 92A, 2009 ed., chap. 6, para. 6.4.2.
28.NFPA 92A, 2009 ed., chap. 6, para. 6.4.3.3.
29.NFPA 92A, 2009 ed., chap. 6, para. 6.4.3.4.
29
Fire detection devices “include automatic devices such
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 7
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Chapter 1
as smoke detectors, waterflow switches, and heat detectors.”30 Manual fire
alarm pull stations should generally not be used to activate automatic
smoke-control systems, other than stairwell pressurization systems,
because of the likelihood of a person signaling an alarm from a station
outside the smoke zone of origin.
31
Response Time Smoke control system activation should be started immediately after
receiving an activation command. A maximum of 10 seconds transmission
time is allowed, from the initiation of an activation signal (i.e. fire alarm
input), to the time it reaches the MicroNet BACnet smoke control system
(i.e. binary input of a MicroNet controller). The smoke-control sequence
should activate individual components in the sequence necessary to prevent
physical damage to fans, ducts, dampers, and other equipment. The total
response time of the individual component starts from the moment the
smoke-control command is issued (whether automatic or manual) to the final
action. This time is 60 seconds for fan operation at the desired state and
75 seconds for the completion of the damper travel.
component fail, the time lapse from the moment the component should have
reached its final state and the moment its associated trouble signal
annunciates, should not exceed 10 seconds.
33
annunciation of the trouble signal for a fan must occur within 70 seconds of
the automatic or manual activation command. The annunciation of the
damper trouble signal must occur within 85 seconds of the automatic or
manual activation command.
32
Should an individual
This means that the
Firefighter’s Smoke
Control Station
The Firefighter's Smoke Control Station (FSCS) “shall provide status
indication, fault condition indication, and manual control of all smoke-control
system components.”
over all smoke-control systems and equipment. “
take precedence over fire suppression, electrical protection, or personnel
protection devices.”
34
“The FSCS shall have the highest priority control
36
For more information, refer to the NFPA 92A and
35
“FSCS control shall not
UL 864 UUKL/UUKL7 standards.
The FSCS should contain a building diagram that clearly indicates the type
and location of all smoke control equipment, such as fans and dampers.
37
The areas of the building that are affected by the equipment and the actual
status of all of the smoke control equipment should be clearly indicated at
the FSCS. Status indication should be provided for each fan showing
whether it is ON or OFF. Status indication of the full-closed and full-open
positions of each smoke control damper should also be shown on the
38
FSCS.
30.NFPA 92A, 2009 ed., annex 6, para. A.6.4.3.4.
31.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.3.5.2 and 6.4.3.5.3, and annex A,
32.Underwriters Laboratories Inc., UL 864, Control Units and Accessories for Fire
33.UL 864, 9th ed., para. 49.2.b
34.NFPA 92A, 2009 ed., chap. 6, para. 6.4.3.7.3.
35.NFPA 92A, 2009 ed., chap. 6, para. 6.4.3.7.11.
36.NFPA 92A, 2009 ed., chap. 6, para. 6.4.3.7.14, and UL 864, 9th ed., para. 48.3.
37.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.10 and annex D, para D.1 (2).
Proof of air flow should be used to determine the fan status. Proof
para’s A.6.4.3.5.2 and A.6.4.3.5.3.
Alarm Systems, 9th ed. (2003), para. 49.2.c.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 25
Introduction
of damper positions should be done using end process verification. This may
be done through the use of damper degree-of-opening switches, flow
stations, etc.
Whenever the communications fails between any of the I/A Series MicroNet
BACnet controllers that are integral to the smoke-control equipment or
sequences, including instances when a controller loses power, a system
trouble visual indicator (i.e. LED) at the FSCS should illuminate and an
audible signal must sound.
also be generated if any of the smoke-control equipment proof sensors fail
to operate within a specified period of time during the smoke-control
sequence or when under control of the FSCS.
indicators must annunciate an audible sound. In addition to the status
indication that is required for all of the smoke-control equipment, each
dedicated piece of smoke-control equipment must also provide a visual
trouble indicator specifically for that device.
39
The visual and audible trouble indicators must
40
In general, all visual trouble
41
Control Sequence for Stair Pressurization Systems
Control Sequence for Zoned Smoke-Control Systems
Any time a smoke/fire detector trips (refer to NFPA 92A and
UL 864 UUKL/UUKL7 for acceptable signaling device types), initiating an
automatic smoke-control sequence, all stairwell pressurization fans shall be
energized
determines that operation of all stairwell pressurization fans is not required
to achieve the design objective, only the stairwell pressurizaiton fans
identified during the analysis shall be required to be activated.”
detector should be provided in the air supply to each fan that stops the
respective pressurization fan when smoke is detected.
switch for each fan should be provided at the FSCS that allows the stairwell
fans to restart after they have been shutdown due to the supply air smoke
detectors,
entering the fan than smoke migrating into the stairwell. When a stairwell
pressurization sequence is used in conjunction with zoned smoke control,
care must be taken to prevent the interrelation of the two sequences from
adversely affecting each other.
“Automatic activation of systems and equipment for zoned smoke control
should have the highest priority over all other sources of automatic control
within the building.”
used for normal building control such as HVAC systems, the equipment
control should be pre-empted as required by the smoke-control sequence.
“The following controls should not be automatically overridden:
42
, with one exception. “Where an engineering analysis
43
A smoke
44
A manual override
45
should it be determined that a lessor hazard exists from smoke
46
47
For example, when the smoke-control equipment is
• Static pressure high limits.
38.NFPA 92A, 2009 ed., chap 6, para’s 6.4.3.7.3 through 6.4.3.7.10, and annex D,
para D.1 (5).
39.UL 864, 9th ed., para’s 48.5, 49.4, 49.6, and 49.7.
40.UL 864, 9th ed., para’s 48.5 and 49.6.
41.NFPA 92A, 2009 ed., chap 6, para’s 6.4.3.7.3 and UL 864, 9th ed., para 49.6.
42.NFPA 92A, 2009 ed., chap 6, para 6.4.4.1.
43.NFPA 92A, 2009 ed., chap 6, para 6.4.4.1.1.
44.NFPA 92A, 2009 ed., chap 6, para’s 6.4.4.2.1 and 6.4.4.2.2.
45.NFPA 92A, 2009 ed., chap 6, para 6.4.4.4.
46.NFPA 92A, 2009 ed., annex A, para. A.5.7.
47.NFPA 92A, 2009 ed., chap. 6, para. 6.4.5.2.1.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 9
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Chapter 1
• Duct smoke detectors on supply air systems.”
Manual activation or deactivation of zoned smoke-control systems and equipment
(at the FSCS) should take priority over automatic activation, as well as take
priority over all other sources of automatic control within the building.
controls provided specifically for this purpose should be clearly marked as to the
zone and function served (typically part of the FSCS).
Any time a smoke/fire detector trips initiating an automatic smoke-control
sequence, all stairwell pressurization sequences should operate as stated
previously.
several smoke-control zones, the supply and return fan for the AHUs are
commanded ON. The outdoor and exhaust air dampers for each AHU drive to the
full-open position and the return air damper drives to the full-closed position. All
exhaust air dampers in the smoke zone drive to the full-open position and the
supply air dampers drive to the full-closed position. All smoke-control zones
contiguous to the smoke zone (and optionally all remaining smoke-control
zones
their exhaust air dampers driven to the full-closed position. Pressurization of the
non-contiguous (optional) smoke-control zones is dependent upon the
smoke-control system design and its associated specification. Regardless of
whether or not non contiguous zones are positively pressurized, sufficient
differential pressure must be achieved to limit the smoke spread to the zone in
which the fire originated.
This smoke-control sequence provides the maximum amount of outdoor air to the
nonsmoke zones causing them to be positively pressurized. Since the exhaust air
dampers are fully open in the smoke zone and no supply air is being provided, the
AHU begins exhausting the smoke from the smoke zone. With the nonsmoke
zones being positively pressurized in this manner, smoke is inhibited from
migrating outside of the smoke zone.
51
For applications where each central air handling unit (AHU) supplies
52
) should have their supply air dampers driven to the full-open position and
48
50
49
Manual
Automatic Response To Multiple Signals
Maintaining System Integrity
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
10
Once an automatic activation has occurred, subsequent alarm signals that would
normally result in the automatic actuation of a smoke-control sequence should be
annunciated only. No fans or dampers should be actuated in response to any
subsequent automatic alarm signal in order to avoid the possibility of defeating
any smoke-control sequence which is in process.
A prime concern with any emergency signaling system is maintaining system
integrity. This is typically accomplished by electrical supervision of wiring,
however, since the proper operation of the fans and dampers associated with a
smoke-control system may involve mechanically and pneumatically operated
devices, as well as electrically operated devices, end-process verification is
considered an acceptable alternative.
Smoke control system equipment is required to verify that a fan or damper has
achieved its required end function. This end function verification consists of
monitoring fans by differential pressure switches, flow stations, and etc., and
48.NFPA 92A, 2009 ed., chap. 6, para. 6.4.5.2.1.2.
49.NFPA 92A, 2009 ed., chap. 6, para. 6.4.5.2.2.
50.NFPA 92A, 2009 ed., chap. 6, para. 6.4.5.2.4.1.
51.NFPA 92A, 2009 ed., chap 6, para’s 6.4.4.1 and 6.4.4.1.1.
52.NFPA 92A, 2009 ed., annex A, para. A.5.5.1.1.1.
Page 27
Introduction
monitoring dampers by degree-of-opening switches, differential pressure
switches, and etc. These verification devices should be connected back to
the smoke-control system equipment (I/A Series BACnet, for example) and
the system programmed to expect the appropriate signal within the specified
amount of time.
Any change in a smoke-control signal input (i.e. FAP, FSCS, etc) must be
received into the smoke-control system in 10 seconds or less. Fans and
dampers have 60 and 75 seconds, respectively, from the time the signal
input is received, to successfully respond to smoke-control sequence
commands. If a fan or damper fails to achieve its desired state within the
times referenced above, the failures have to be annunciated within an
additional 10 seconds. Other trouble signals, such as communication
failures (supervised through software), have up to 200 seconds to
annunciate their failures.
Annunciation of the end function sensor is not required if the proof sensor
operates as intended, but if the proof sensor fails to operate, an audible and
visual trouble signal must be generated at the FSCS. This would be typical
of the operation of the smoke-control system during an emergency
condition.
For operation during a nonemergency condition, the means for verifying
system integrity varies based on whether the smoke-control system is a
dedicated or nondedicated system. Nondedicated smoke-control systems
and equipment consist of HVAC components within a building which are
operated regularly. Therefore, the normal “comfort” level associated with the
operability or inoperability of the equipment is considered an acceptable
means of maintaining system integrity.
53
54
55
Smoke-Control System Schedule
Dedicated smoke-control systems and equipment are used solely for the
purpose of smoke-control and are not operated in a nonemergency
condition. Dedicated system equipment is therefore required to incorporate
an automatic weekly self-test of each smoke-control function. The self-test
consists of the smoke-control system automatically commanding the
associated function to operate and expecting that the associated proof
sensor operates within a specified period of time (refer to response times
noted earlier). A valid proof sensor operation is not required to annunciate,
however, the lack of an expected proof sensor operation must produce an
audible trouble signal, as well as indicate the specific device that did not
operate (for example, LED at the FSCS).
Each different smoke-control system configuration/sequence should be
defined in a schedule, typically a matrix chart. The schedule should list all
dedicated and nondedicated smoke-control equipment and show the
equipment response for each sensor that activates an automatic sequence.
At a minimum, the schedule should include the following information:
• Each smoke zone in which a smoke-control system automatically
activates.
53.NFPA 92A, 2009 ed., chap. 6, para. 6.4.6. and annex A, para. A.6.4.6.
54.UL 864, 9th ed., para. 36.1.2 (c), 49.2 (b).
55.NFPA 92A, 2009 ed., chap. 2, para. 2.1.2. and 2.1.5., and UL 864, 9th ed.,
para’s 49.7.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 11
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Chapter 1
• The type of alarm signal that activates the smoke-control system (smoke
detector, sprinkler water flow, and etc.)
• The smoke zones where maximum mechanical exhaust to the outside is
implemented and no supply air is provided.
• The positively pressurized smoke-control zones where maximum supply air is
implemented and no exhaust to the outside is provided.
• The fans that are ON as required to implement the smoke-control system.
Multiple-speed fans should be further noted as FAST or MAX VOLUME to
ensure that the intended control configuration is achieved.
• The fans that are OFF as required to implement the smoke-control system.
• The dampers that are Open where maximum air flow must be achieved.
• The dampers that are Closed where no air flow should take place.
• Any additional functions that may be required to achieve the smoke-control
objective or that may be desirable in addition to smoke control. Changes or
override of normal static pressure control setpoints should also be indicated if
applicable.
• Damper position at fan failure.
56
Conclusion
When applying I/A Series BACnet controllers to smoke-control sequences, review
this introductory information along with the NFPA 92A and UL 864 UUKL/UUKL7
standards. This information should be used in conjunction with the sample
smoke-control applications (Chapters 2 through 4) and the restrictions and
general comments (Chapter 5) that are part of the total smoke-control
documentation provided by Schneider Electric.
56.NFPA 92A, 2009 ed., annex A, para 6.4.5.3 (10).
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Chapter 2
High-rise Smoke Control
Purpose
This application provides guidelines for using I/A Series MicroNet BACnet
controllers in a five-floor, high-rise office building (Figure–2.1) that requires
the UL 864 UUKL/UUKL7 listing for Smoke-Control Systems. This
application uses MNB-300, MNB-Vx, and MNB-1000 controllers that perform
HVAC functions when in the normal control mode. When in the
smoke-control mode, they perform the required smoke-control sequences
by controlling the stairwell pressurization fans, the individual terminal boxes,
the dedicated smoke-control dampers, and the central air handling unit
(AHU) fans. Additionally, they control all supply, exhaust, and return air
dampers, and provide the feedback of all end-process verification required.
The I/A Series BACnet controllers monitor N.O. relay contacts of a UOJZ
listed fire alarm panel for automatic activation of the smoke-control
sequences and monitor a UL 864 UUKL/UUKL7 Listed Firefighter’s Smoke
Control Station (FSCS) for manual activation commands and overrides. In
this example, an ADI FSCS is used, which supports the ADI ModBus
interface to the MNB-1000. This interface provides control over all the FSCS
visual and audible status indicators, as well as receipt of the FSCS override
commands, thus eliminating the need to allocate additional controllers to
interface to the FSCS through individual I/O points.
Sequence of Operation
Normal HVAC Control
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 13
Under normal conditions, the central AHU follows an occupied schedule that
determines when the AHU operates. During the unoccupied mode, the
outdoor and exhaust air dampers are in the full-closed position. The return
air damper is in the full-open position. The supply and return fans are
commanded OFF. During the occupied mode, the supply and return fans are
commanded ON. The outdoor, exhaust, and return air dampers modulate as
required to maintain a mixed air temperature setpoint. The central AHU can
have a wide variety of additional control sequences that determine its
operation and establish its operating priorities (for example, low limit stats
and minimum outdoor air).
Page 30
Chapter 2
Figure–2.1 High-rise Building Layout.
Central Air Handling Unit
Exhaust Air Damper
Return Air Damper
Return Air Supply Fan
Exhaust
Air
Damper
Exhaust
Air
Damper
Exhaust
Air
Damper
Eight MNB-Vx Controllers
Eight MNB-Vx Controllers
Eight MNB-Vx Controllers
Outdoor Air Damper
Supply Air
Damper
5th Floor
Supply Air
Damper
4th Floor
Supply Air
Damper
Stairwell #2Stairwell #1
Pull
Station
Pull
Station
Pressurization
Fan - Stair 1
Duct Smoke
Detector
SD
3rd Floor
Exhaust
Air
Damper
Exhaust
Air
Damper
Note: All references to the MNB-V1 equally apply to the
MNB-V1-2 and all references to the MNB-V2 equally
apply to the MNB-V2-2.
Eight MNB-Vx Controllers
2nd Floor
Eight MNB-Vx Controllers
1st Floor
Supply Air
Damper
Supply Air
Damper
Pressurization
Fan - Stair 1
SD
Duct Smoke
Detector
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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High-rise Smoke Control
The terminal boxes are controlled by MNB-V1 and MNB-V2 controllers. During
normal conditions and in the occupied mode, the terminal boxes maintain their
respective zone temperature setpoints by modulating their primary air dampers
and staging the electric reheat coils (if present). During the unoccupied mode, the
terminal boxes either maintain their respective unoccupied zone temperature
setpoints or drive to a fixed position.
In many cases, a dedicated motor-driven damper is required in the common
supply air duct that feeds each smoke-control zone. The dampers are required to
ensure that the smoke zones can be negatively pressurized (with respect to all
contiguous smoke-control zones) within the 75 second response time required by
NFPA 92A and UL 864 UUKL/UUKL7. Dedicated supply air dampers and their
control are shown in this example to cover worst case MNB-V1 and MNB-V2
applications.The dedicated supply air dampers are controlled by digital output
(DO) points from the MNB-Vx controllers associated with their respective zones.
The dampers remain in the full-open position at all times, unless commanded
otherwise due to a smoke-control related condition.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for
UUKL/UUKL7 is based on the assumption that negative pressurization of a smoke
zone is considered accomplished when the total CFM flow supplied to the zone
drops below 50% of its maximum with its dedicated exhaust damper fully open. If
the damper response time is acceptable (less than 75 seconds) under this
condition and proper pressurization is achieved, dedicated supply air dampers are
not necessary solely to meet response time requirements. In all cases, exhaust
and supply air dampers should continue to be driven to their full-open and
full-closed positions. The smoke-control system design and its associated
specification will dictate whether additional requirements apply to the supply air
dampers.
The exhaust air dampers associated with each floor (smoke-control zone) are
considered dedicated smoke-control systems, and in this application, are
controlled by digital output (DO) points from the MNB-Vx controllers associated
with their respective zones. The dampers are always in the full-open position,
unless commanded otherwise due to a smoke-control related condition. Typically,
these dampers use actuators that spring-return to their “fail-safe” position upon
power loss.
The dedicated stairwell pressurization fans are controlled by an MNB-300
controller. The status of each fan is monitored by a flow switch. Since these fans
are considered dedicated smoke-control equipment, they are always OFF, unless
commanded otherwise due to a smoke-control related condition.
The Fire Alarm Panel (i.e. Listed Fire Alarm Control Unit) is the primary indicator
for fire alarm, smoke detector, and pull station conditions. It is also the primary
initiator of the automatic smoke/fire alarm sequence. Upon detection of smoke
and/or fire, a set of contacts in the Fire Alarm Panel (for the zone affected) close,
indicating to the building automation system that a smoke or fire condition exists.
In this application, a smoke detector is provided for each floor (smoke-control
zone). Smoke detectors are also provided in the supply air for each stairwell
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 15
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Chapter 2
pressurization fan. The contacts from the Fire Alarm Panel for the
associated smoke detectors and stairwell pull stations are monitored by
MNB-300 controllers.
Note: Any UOJZ listed fire alarm panel with programmable N.O. relay
contacts can be used with I/A Series BACnet controllers.
The Automation Displays, Inc. Firefighter’s Smoke Control Station (i.e. Listed
Smoke Control Panel) is the primary indicator for the status of all smoke
control and related HVAC equipment. It also provides the interface for the
manual activation commands and overrides for all smoke-control related
equipment. An MNB-1000 controller is mounted internal to the FSCS and
provides the ADI ModBus (control) interface to the FSCS. All commands
issued from the FSCS are monitored and distributed throughout the network
as required to implement the manual smoke-control sequences and
overrides. The status of all of the smoke-control systems and equipment, as
well as HVAC monitored trouble signals, are returned to the FSCS for visual
indication and in some cases audible annunciation. The FSCS MNB-1000
will be the central coordinator of all smoke-control activity.
Note: Currently, only the UUKL Listed FSCS from Automation Displays, Inc.
(ADI) supports the ADI ModBus interface. For those applications where the
ADI ModBus serial communication interface is used, only the ADI FSCS can
be used. Whenever discrete I/O points are used to communicate with the
FSCS, any UUKL Listed FSCS can be used. When discrete I/O is used for
this purpose, many additional I/A Series controllers will be required to
provide the individual I/O point interfaces, and this should be considered
when estimating a job.
During normal operating conditions, the nondedicated smoke-control
equipment does not require an automatic self-test since this equipment
consists of HVAC components that are operated on a regular basis. The
normal “comfort” level associated with the operability or inoperability of the
equipment is considered an acceptable means of maintaining system
integrity.
Dedicated smoke-control equipment, however, is used only when a
smoke-control situation occurs, and therefore an automatic weekly self-test
of each dedicated smoke-control function is required. In this application,
stairwell pressurization fan operation is verified using differential pressure
sensors. The MNB-Vx damper position is verified by monitoring the cubic
feet per minute (CFM) flow from the terminal box and/or its integral damper
position feedback. Damper end switches are used to verify the end stroke of
all other motor-driven dampers. If a valid proof of each function occurs, no
annunciation needs to take place. Otherwise, if the expected proof sensor
does not operate as required, an audible trouble signal is generated and an
LED is illuminated at the FSCS indicating the specific device that did not
operate.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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High-rise Smoke Control
Smoke Control Sequences
This application uses a combination of smoke-control systems to implement the
smoke-control strategy. These systems consist of stairwell pressurization and
zoned smoke control.
Anytime a fire alarm pull station is activated, the automatic stairwell pressurization
sequence will be initiated. Since multiple pull stations will be present, activation of
any station will initiate the sequence for both stairwells. When the automatic
sequence is triggered in this manner, it will leave the remainder of the
smoke-control system in its normal mode.
Anytime a smoke/fire detector trips, an automatic smoke-control sequence is
initiated and both dedicated stairwell pressurization fans are energized. A smoke
detector, provided in the air supply to each fan, stops the respective
pressurization fan if smoke is detected.
57
A manual override switch (for each fan)
provided at the FSCS allows the stairwell pressurization fans to be restarted after
they have shutdown due to the air supply smoke detectors,
58
should it be
determined that a lessor hazard exists from smoke entering the fan than from
smoke migrating into the stairwell. The pressurization of the stairwell restricts the
flow of smoke into the stairwell allowing ready evacuation of the smoke zone and
providing a staging area for firefighters.
59
Zoned smoke control divides a building into a number of zones for the purpose of
inhibiting smoke movement.
60
The zones are separated from each other by
smoke barriers. In the event of a fire, pressure differences and airflows produced
by mechanical fans and operating dampers are used to limit the smoke to the
zone in which the fire originated.
61
In this application, each floor of the high-rise is
considered a smoke-control zone. When smoke is detected in any zone, all of the
nonsmoke zones that are contiguous to the smoke zone, and optionally, all
nonsmoke zones in the building,
62
are positively pressurized and the smoke is
exhausted from the smoke zone. Pressurization of the noncontiguous (optional)
smoke-control zones is dependent upon the smoke-control system design and its
associated specification. Regardless of whether or not the noncontiguous
smoke-control zones are positively pressurized, sufficient differential pressure
must be achieved to limit smoke spread to the zone in which the fire originated.
If the smoke/fire detector for Floor 2 trips first, the automatic smoke-control
sequence is initiated in the following manner.
1. The central AHU supply and return fans are commanded ON, the return air
damper is driven to the full-closed position and the outdoor air and exhaust air
dampers are driven to their full-open positions. This allows maximum fresh air
to be delivered to the floors above and below the floor reporting the smoke
condition. It also allows maximum exhausted air to be expelled from the zone
reporting the smoke condition.
2. The dedicated exhaust air dampers for Floors 1, 3, 4, and 5 are driven to the
full-closed position while the dedicated exhaust air damper for Floor 2 is driven
to the full-open position.
57.National Fire Protection Association, Inc., NFPA 92A, Standard for Smoke-Control
Systems Utilizing Barriers and Pressure Differences, NFPA 92A, 2009 ed., chap 6,
para. 6.4.4.2.
58.NFPA 92A, 2009 ed., chap 6, para 6.4.4.4.
59.NFPA 92A, 2009 ed., chap. 4, para 4.1.2 (2) and annex A, para. A.4.1.2 (1).
60.NFPA 92A, 2009 ed., chap. 5, para. 5.5.1.1.
61.NFPA 92A, 2009 ed., annex A, para. A.5.5.
62.NFPA 92A, 2009 ed., annex A, para. A.5.5.1.1.1.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 17
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Chapter 2
3. The dedicated supply air damper for Floor 2 is driven to the full-closed
position. The terminal box supply dampers may optionally be driven to
the full-closed position also. This causes the smoke zone to become
negatively pressurized.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL
is based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone
drops below 50% of its maximum with its dedicated exhaust damper fully
open. Sufficient differential pressure must be achieved to ensure smoke
spread is confined to the zone in which the fire originated. In all cases,
exhaust and supply air dampers should continue to be driven to their
full-open and full-closed positions.
4. The dedicated supply air dampers for Floors 1, 3, 4, and 5 remain in the
full-open position. The respective terminal box supply dampers, which
are controlled by MNB-V1 and MNB-V2 controllers, modulate open. The
CFM flow supplied to these floors causes them to be positively
pressurized. The terminal box supply dampers continue to modulate
open until they reach the full-open position.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL
is based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone
drops below 50% of its maximum with its dedicated exhaust damper fully
open. In all cases, exhaust and supply air dampers should be driven to their
full-open and full-closed positions. Sufficient differential pressure must be
achieved to ensure smoke spread is confined to the zone in which the fire
originated. In all cases, exhaust and supply air dampers should continue to
be driven to their full-open and full-closed positions.
5. The automatic smoke-control sequence takes priority over the normal
HVAC control sequences and any HVAC control overrides. Static
pressure high limits and duct smoke detectors on supply air systems
should not be automatically overridden.
63
6. Once the automatic activation occurs, subsequent alarm signals that
would normally initiate an automatic smoke-control sequence annunciate
only. (For example if, in addition to the Floor 2 smoke/fire detector, the
Floor 4 detector also trips, no change to the smoke-control sequence
occurs and the Floor 4 smoke condition also annunciates at the FSCS.)
7. At any time, the FSCS is capable of overriding either partially, or in full,
any automatic activation of a smoke-control sequence that may be in
process.
64
8. The communications between all of the I/A Series BACnet controllers
that are part of the smoke-control sequences must be monitored. If the
communications between any of these controllers fails, at any time, the
system trouble LED at the FSCS must illuminate and an audible signal
must be generated.
63.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.2 and 6.4.5.2.1.2.
64.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
65
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High-rise Smoke Control
9. If any of the smoke-control equipment proof sensors fail to operate within a
specified period of time during the smoke-control sequence, or when under
control of the FSCS, the system trouble LED at the FSCS illuminates and an
audible signal is generated. If the failed smoke-control equipment is dedicated,
its associated trouble LED also illuminates.
If the smoke/fire detector for Floor 3 trips first, the automatic smoke-control
sequence is initiated in the following manner.
1. The central AHU supply and return fans are commanded ON, the return air
damper is driven to the full-closed position and the outdoor air and exhaust air
dampers are driven to their full-open positions. This allows maximum outdoor
air to be delivered to the floors above and below the floor reporting the smoke
condition. It also allows maximum exhausted air to be expelled from the zone
reporting the smoke condition.
2. The dedicated exhaust air dampers for Floors 1, 2, 4, and 5 are driven to the
full-closed position while the dedicated exhaust air damper for Floor 3 is driven
to the full-open position.
3. The dedicated supply air damper for Floor 3 is driven to the full-closed position.
The terminal box supply dampers may optionally be driven to the full-closed
position also. This causes the smoke zone to become negatively pressurized.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open.
Sufficient differential pressure must be achieved to ensure smoke spread is
confined to the zone in which the fire originated. In all cases, exhaust and supply
air dampers should continue to be driven to their full-open and full-closed
positions.
4. The dedicated supply air dampers for Floors 1, 2, 4, and 5 remain in the
full-open position. The respective terminal box supply dampers, which are
controlled by MNB-V1 and MNB-V2 controllers, modulate open. The CFM flow
supplied to these floors causes them to be positively pressurized. The terminal
box supply dampers will continue to modulate open until they reach the
full-open position.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open.
Sufficient differential pressure must be achieved to ensure smoke spread is
confined to the zone in which the fire originated. In all cases, exhaust and supply
air dampers should continue to be driven to their full-open and full-closed
positions.
65.Underwriters Laboratories Inc., UL 864, Control Units and Accessories for Fire Alarm
Systems, 9th ed. (2003), para’s 48.5, 49.4, 49.6, and 49.7.
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Chapter 2
5. The automatic smoke-control sequence takes priority over the normal HVAC
control sequences and any HVAC control overrides. Static pressure high limits
and duct smoke detectors on supply air systems should not be automatically
overridden.
6. Once the automatic activation occurs, subsequent alarm signals that would
normally initiate an automatic smoke-control sequence annunciate only. (For
example if, in addition to the Floor 3 smoke/fire detector, the Floor 2 detector
also trips, no change to the smoke-control sequence occurs and the Floor 2
smoke condition also annunciates at the FSCS.)
66
7. At any time, the FSCS is capable of overriding either partially, or in full, any
automatic activation of a smoke-control sequence that may be in process.
8. The communications between all of the I/A Series BACnet controllers that are
part of the smoke-control sequences must be monitored. If the
communications between any of these controllers fails, at any time, the system
trouble LED at the FSCS must illuminate and an audible signal must be
generated.
9. If any of the smoke-control equipment proof sensors fail to operate within a
specified period of time during the smoke-control sequence, or when under
control of the FSCS, the system trouble LED at the FSCS illuminates and an
audible signal is generated. If the failed smoke-control equipment is dedicated,
its associated trouble LED also illuminates.
68
Smoke-Control System Configuration Schedule
Each smoke-control system configuration should be defined in a schedule.69 The
schedule should list all dedicated and nondedicated smoke-control equipment
and show the equipment response for each sensor that activates an automatic
smoke-control sequence. An example schedule for this application is shown in
Table–2.1.
Note:
• According to NFPA 92A, only the smoke zones that are contiguous to the
zone reporting the smoke condition have to be positively pressurized. For this
application, all non-smoke zones are being positively pressurized.
• Pressurization of the noncontiguous (optional) smoke-control zones is
dependent upon the smoke-control system design and its associated
specification. Regardless of whether or not noncontiguous smoke-control
zones are positively pressurized, sufficient differential pressure must be
achieved to ensure smoke spread is confined to the zone in which the fire
originated.
67
66.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.2 and 6.4.5.2.1.2.
67.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
68.UL 864, 9th ed., para’s 48.5, 49.4, 49.6, and 49.7.
69.NFPA 92A, 2009 ed., chap. 6, para 6.4.5.3 and annex A, para A.6.4.5.3.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
20
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High-rise Smoke Control
Table–2.1 Schedule for Smoke-Control System Configuration.
Dedicated and
Nondedicated Smoke
Control Equipment
AHU Supply Fan ON ON ON ON ON
AHU Return Fan ONONONONON
AHU O.A. Damper Full Open Full Open Full Open Full Open Full Open
AHU Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed
AHU Exhaust Damper Full Open Full Open Full Open Full Open Full Open
Stair 1 - Press. FanONONONONON
Stair 2 - Press. FanONONONONON
1st Floor Exhaust
Damper
1st Floor Supply Damper Full Closed Full Open Full Open Full Open Full Open
1st Floor MNB-Vx Units 1
to 8
1st Floor as a Zone Neg. Press. Pos. Press. Pos. Press. Pos. Press. Pos. Press.
2nd Floor Exhaust
Damper
2nd Floor Supply Damper Full Open Full Closed Full Open Full Open Full Open
2nd Floor MNB-Vx Units
9 to 16
2nd Floor as a Zone Pos. Press. Neg. Press. Pos. Press. Pos. Press. Pos. Press.
3rd Floor Exhaust
Damper
3rd Floor Supply Damper Full Open Full Open Full Closed Full Open Full Open
3rd Floor MNB-Vx Units
17 to 24
3rd Floor as a Zone Pos. Press. Pos. Press. Neg. Press. Pos. Press. Pos. Press.
4th Floor Exhaust
Damper
4th Floor Supply Damper Full Open Full Open Full Open Full Closed Full Open
4th Floor MNB-Vx Units
25 to 32
4th Floor as a Zone Pos. Press. Pos. Press. Pos. Press. Neg. Press. Pos. Press.
5th Floor Exhaust
Damper
5th Floor Supply Damper Full Open Full Open Full Open Full Open Full Closed
5th Floor MNB-Vx Units
33 to 40
5th Floor as a Zone Pos. Press. Pos. Press. Pos. Press. Pos. Press. Neg. Press.
1st Floor
Smoke Detector
in Alarm
Full Open Full Closed Full Closed Full Closed Full Closed
Full Closed Full Open Full Open Full Open Full Open
Full Closed Full Open Full Closed Full Closed Full Closed
Full Open Full Closed Full Open Full Open Full Open
Full Closed Full Closed Full Open Full Closed Full Closed
Full Open Full Open Full Closed Full Open Full Open
Full Closed Full Closed Full Closed Full Open Full Closed
Full Open Full Open Full Open Full Closed Full Open
Full Closed Full Closed Full Closed Full Closed Full Open
Full Open Full Open Full Open Full Open Full Closed
2nd Floor
Smoke Detector
in Alarm
3rd Floor
Smoke Detector
in Alarm
4th Floor
Smoke Detector
in Alarm
5th Floor
Smoke Detector
in Alarm
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 21
Page 38
Chapter 2
Firefighter’s Smoke Control Station (FSCS)
The requirements of the FSCS are described below. For more information
regarding the FSCS requirements, refer to the NFPA 92A standard.
Location and Access
Physical Arrangement
Status Indicators
The FSCS should be located in proximity to other firefighter’s systems that are
provided within the building. Means should be provided to ensure only authorized
access to the FSCS.
The FSCS should be designed to depict graphically the physical building
arrangement, smoke-control systems and equipment, and the areas served by the
equipment (Figure–2.2).
Visual status indicators should be provided for all smoke-control equipment.71 For
dampers, a green LED is used to indicate Open and a yellow LED is used to
indicate Closed. For fans, a green LED is used to indicate the ON state and a
yellow LED is used to indicate the OFF state.
The visual indication requirements are:
70
72
All trouble indicators use red LEDs.
• The Open and Closed positions of the central AHU supply, return, and exhaust
air dampers (non-dedicated equipment).
• The ON and OFF status of the central AHU supply and return fans
(nondedicated equipment).
• The Open and Closed positions of the exhaust air dampers (dedicated
equipment) for each floor, 1st through 5th.
• A trouble indicator reflecting the ON (trouble) and OFF (normal) status of the
exhaust air dampers for each floor, 1st through 5th. This is required since the
exhaust dampers are considered dedicated equipment.
• The Open and Closed positions of the supply air dampers (combination
dedicated and nondedicated equipment) for each floor, 1st through 5th. The
closed position is determined solely by the “dedicated” supply air damper. The
Open position is determined by the combination of the supply air damper being
fully Open and all of the MNB-Vx controllers modulating their dampers
(non-dedicated equipment) Open.
• A trouble indicator reflecting the ON (trouble) and OFF (normal) status of the
supply air dampers for each floor, 1st through 5th. This is required since the
supply dampers are considered dedicated equipment.
• A trouble indicator reflecting the ON (alarm) and OFF (normal) status of the
smoke alarm for each smoke-control zone (1st through 5th floors).
• The ON and OFF status of the pressurization fans (dedicated equipment) for
stairwells 1 and 2.
• A trouble indicator reflecting the ON (trouble) and OFF (normal) status of the
pressurization fans for stairwells 1 and 2. This is required since the
pressurization fans are considered dedicated equipment.
• A trouble indicator reflecting the ON (alarm) and OFF (normal) status of the
smoke detector in the supply duct of each stairwell pressurization fan.
70.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.10 and annex D, para D.1 (2).
71.NFPA 92A, 2009 ed., annex D, para D.1 (2).
72.NFPA 92A, 2009 ed., annex D, para D.1 (2) (a) and D.1 (2) (b).
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 39
High-rise Smoke Control
• A system trouble indicator reflecting the ON (trouble) and OFF (normal) status
of the smoke-control system. This indicator is illuminated if any trouble exists
in the system.
Audible Annunciation
Control Capability
Additional Control Requirements
All smoke alarm, dedicated trouble and general trouble indicators at the FSCS
should also cause an audible annunciation of the condition to be generated.
“The FSCS shall have the highest priority control over all smoke-control systems
and equipment”
toggle or rotary switches are used to provide control as follows:
73
within the building. In this application, 3-position (ON-OFF-ON)
• OPEN-AUTO-CLOSE control of the central AHU supply, return, and exhaust
air dampers.
• ON-AUTO-OFF control of the central AHU supply and return fans.
• OPEN-AUTO-CLOSE control of the exhaust air dampers for each floor, 1st
through 5th.
• OPEN-AUTO-CLOSE control of the supply air dampers for each floor, 1st
through 5th.
• ON-AUTO-OFF control of the pressurization fans for stairwells 1 and 2.
Provisions should be made at the FSCS for testing the visual indicators, providing
audible device silencing and enabling/disabling the manual control capability of
the FSCS. This would be done as follows:
• A manual override enable key switch that can enable and disable the
functionality of the control switches mentioned previously. This will also
enable and disable the audible device silence switch. A status indicator (i.e.
green LED) is provided that will light when the FSCS override capability is
enabled. The key associated with the switch should be non-removable when
the FSCS is enabled.
• An audible device silence switch (momentary push-button) that is functional
only when the FSCS is in the enable state.
• A lamp test switch (momentary push-button) for testing all LEDs on the FSCS.
This switch will be enabled at all times.
• All status indicators remain operational regardless of the enabled/disabled
state of the FSCS or the state of the control switches mentioned previously.
73.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 23
Page 40
Chapter 2
Figure–2.2 Firefighter’s Smoke Control Station (FSCS).
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 41
System Topologies
High-rise Smoke Control
MNB-1000 Controllers
The MNB-1000 (Instance 2000) controller provides a complete interface to
the FSCS through its EIA-485 (RS-485) ADI ModBus interface. It is mounted
inside the FSCS, along with its power supply. This controller is the master of
the Smoke Control network since it monitors communications to all of the
controllers that are part of the smoke-control system, distributes and
receives global information between controllers in the network, initiates
smoke-control sequences based on information received from the
appropriate controllers, and provides additional HVAC control.
The MNB-1000 (Instance 1000) controller provides the central AHU control,
monitors end process verification devices, distributes and receives global
information between controllers in the network, monitors communications to
all of the controllers beneath it, and initiates smoke-control sequences
based on information received from the appropriate controllers. Its MS/TP
communication trunk connects to the MNB-Vx controllers that provide HVAC
control of the occupied spaces. These MNB-Vx controllers also control the
common dedicated supply and exhaust air smoke dampers for each
smoke-control zone.
The MNB-1000 (Instance 3000) controller monitors the damper
proof-of-position for the dedicated supply and return air dampers associated
with the smoke-control zones. Additionally, it distributes and receives global
information between controllers in the network, monitors communications to
all of the controllers beneath it, and initiates smoke-control sequences
based on information received from the appropriate controllers. Its MS/TP
communication trunk connects to the MNB-300 controllers that provide end
process verification, control stairwell pressurization, and monitor smoke
alarm and pull station contacts from the UOJZ Fire Alarm Panel. Other
MS/TP BACnet controllers that are not UUKL Listed are connected to the
same trunk, but are isolated from the UUKL Listed controllers through the
use of an approved repeater. These other controllers provide HVAC control
only.
Ethernet/IP Infrastructure
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 25
Any UL 864 Listed IP infrastructure devices can be used to create the
network topology. Currently, only the EIS8-100T and EIS6-100T/FT
switching hubs from Contemporary Controls are available. The path through
the Ethernet/IP network from any one UUKL device to another must use only
UL 864 Listed infrastructure devices. The Ethernet/IP Smoke-Control
System can coexist with the non-UL 864 networks as long as they are
isolated from those networks through the use of UL 864 Listed IP
infrastructure devices. Refer to Chapter 5, Restrictions and General
Comments, for additional information.
Note: At no time can any smoke control signals be passed over the public
Internet.
Page 42
Chapter 2
Wiring Requirements
Since the I/O wiring between the I/A Series BACnet controllers and the FSCS
(when an I/O wiring interface is used) and the UOJZ Fire Alarm Panel is
unsupervised, the I/A Series BACnet controllers used for this purpose must be
mounted within 20 ft of the panel to which they are connected. The I/O wiring must
be run in conduit. The table below (Table–2.2) lists the general requirements for
the wiring associated with an I/A Series BACnet smoke-control application.
Table–2.2 Wiring Requirements
Wiring Status
Ethernet/IP Supervised by block programming
Supervised by block programming. When
EIA-485 ADI ModBus
MS/TP Bus Supervised by block programming
I/O to FSCS
I/O to UOJZ FAP Contacts
Remaining I/O Unsupervised
MNB-1000 is mounted external to the FSCS, wiring
must be run in conduit and controller must be
located within 20 ft. of the panel.
Unsupervised, wiring must be run in conduit and
controllers must be located within 20 ft. of the
panel.
Unsupervised, wiring must be run in conduit and
controllers must be located within 20 ft. of the
panel.
Central System Interface and Overlay Devices
When UNC, Web Server, and/or other central-system type interfaces are attached
to the Ethernet/IP network with the ability to access the smoke-control system,
they must be isolated from the network through the use of UL 864 Listed IP
infrastructure devices (Figure–2.3). This isolation is required by UL because these
devices, PC’s and/or interfaces, are not UL 864 Listed. Therefore these devices
cannot be used for smoke-control purposes.
Refer to Chapter 5, Restrictions and General Comments, for additional
information.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 43
High-rise Smoke Control
Ethernet/IP
Ethernet/IP
Ethernet/IP
Web Access-1
(Internet Explorer)
Web Access-2
(Internet Explorer)
MS/TP
Converter
To remainder of
building's IT
network that is
not UUKL
To Any additional
controllers that are
part of the UUKL
control system
UNC-1
Instance=5000
ENC-2
Instance=4000
EIS8-100T
Switching Hub
EIS6-100T/FT
Switching Hub
WP Tech and Tools
(WP Tech, Commissioning
Tool, and Flow Balance Tool)
Connections for
programming,
commissioning,
and servicing
NW # 864
NW # 864
NW # 864
NW # 3
To damper
position proof
switches
I/O
I/O
EOL
JPR
EOL
JPR
EOL
JPR
To MNB-300
Instance=3001
To MNB-300
Instance=3001
MNB-1000
Instance=3000
MS/TP Addr=0
MNB-1000
Instance=1000
MS/TP Addr=0
MNB-1000
Instance=2000
Remote I/O Bus
(EIA-485, ADI ModBus)
To FSCS
To Central AHU
control and end
process verification
devices
NW # 1
2
3
3
3
3
3
3
4
1
1
4
4
4
5
6
5
6
5
6
7
2
3
4
Key
EOL JPR End-of-line resistor and/or bias
resistors are engaged through
on-board jumpers.
Remote I/O Inputs and outputs remotely
provided by the ADI ModBus
interface. The Remote I/O Port
refers to the top EIA-485 port on
the MNB-1000.
I/O Discrete input and output wiring to
or from controlled or monitored
devices.
NW Network
1 At no time can any smoke control signals be
passed over the public Internet.
2 The UL 864 Ethernet switches shown must be
installed in UL-50 enclosures.
3 The UL 864 Listed Ethernet switches can be
used to provide isolation of non-UUKL devices
from the UUKL Ethernet network. Refer to
Chapter 5, "Restrictions and General
Comments," for additional information
regarding the use of Ethernet/IP networks and
approved devices.
4 The path through the Ethernet/IP network from any one UUKL device to
another must only use UL 864 Listed Ethernet/IP infrastructure devices.
5 All UUKL controllers must be mounted in approved enclosures. Refer to
Chapter 5, "Restrictions and General Comments," for additional information.
6 See "Wiring Requirements" in this chapter.
7 The ADI ModBus interface to the ADI FSCS uses the Remote I/O Bus of the
MNB-1000, not the MSTP Bus.
8 Remote I/O Bus wiring must adhere to the installation requirements defined in
Chapter 5, "Restrictions and General Comments".
Remote I/O
Port (ADI)
8
Note: Only specific UL wiring and installation
requirements are shown. For complete
installation and wiring requirements,
refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide,
F-27360, and other appropriate
documentation listed in Appendix C.
Figure–2.3 Ethernet/IP Network Topology.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 27
Page 44
Chapter 2
MNB-Vx Topology In this application, each floor has eight MNB-Vx controllers that control the
VAV terminal boxes (Figure–2.4). During normal occupied mode, each
MNB-Vx modulates its primary damper and stages the electric reheat coils,
as required, to maintain their individual zone temperature setpoints. During
the unoccupied mode, the terminal boxes either maintain their respective
unoccupied zone temperature setpoints or drive to a fixed position. Although
the MNB-Vx controllers are controlling individual spaces within a floor, each
complete floor is considered a smoke-control zone.
In some applications, when MNB-Vx controllers are used to control the
supply air to a smoke-control zone, a separate supply air damper must be
installed in the common supply duct to each floor/zone. These dampers are
used in this application and are required to guarantee acceptable damper
response times. The dedicated supply air damper is used to close the supply
air to its respective floor when it is considered the smoke zone. Used in
conjunction with the dedicated exhaust air damper, it causes the zone to
become negatively pressurized. Otherwise, this damper is always fully open.
In this example, these dampers are controlled by a spare DO point on an
MNB-Vx associated with the respective smoke-control zone.
A separate exhaust air damper must be installed in the common exhaust
duct to each floor or zone. The dedicated exhaust air damper is used to
open the exhaust air to its respective floor when it is considered the smoke
zone. Used in conjunction with the dedicated return air damper, it causes the
zone to become negatively pressurized. Otherwise, this damper is always
fully open. The exhaust dampers are also controlled by a spare DO point on
an MNB-Vx associated with the respective smoke-control zone.
The MNB-Vx controllers modulate their terminal box primary air dampers, as
required, to provide positive pressurization to all smoke-control zones.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL
is based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone
drops below 50% of its maximum with its dedicated exhaust damper fully
open. Sufficient differential pressure must be achieved to ensure smoke
spread is confined to the zone in which the fire originated. In all cases,
exhaust and supply air dampers should continue to be driven to their
full-open and full-closed positions.
MS/TP Bus Requirements
Typically, MS/TP repeaters are used to provide isolation between UUKL
Listed and non-UUKL Listed devices, or to extend the maximum distance of
the bus. The MS/TP bus can support up to a maximum of 128 devices.
Because each TAC I/A Series MicroNet BACnet controller is only a 1/4-load
node, a repeater is not necessary to support the maximum number of nodes,
or to increase the number of nodes that can be connected to the bus. In
cases where third-party devices are involved, a repeater may be used to
increase the number of devices that can be connected to the bus. In the
application discussed here, the B-LINK-AC-S repeater is used to extend the
distance of the MS/TP bus.
For additional repeater information, refer to Chapter 5, Restrictions and
General Comments.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
28
Page 45
Floor 5 Smoke Control Zone
Floor 4 Smoke Control Zone
Floor 3 Smoke Control Zone
Floor 2 Smoke Control Zone
Floor 1 Smoke Control Zone
MS/TP Bus
*
EOL
MNB-V2
Instance=1008
MS/TP Addr=08
MNB-V2
Instance=1007
MS/TP Addr=07
MNB-V2
Instance=1006
MS/TP Addr=06
MNB-V2
Instance=1005
MS/TP Addr=05
MNB-V2
Instance=1004
MS/TP Addr=04
MNB-V2
Instance=1003
MS/TP Addr=03
MNB-V2
Instance=1002
MS/TP Addr=02
MNB-V2
Instance=1001
MS/TP Addr=01
MNB-V2
Instance=1009
MS/TP Addr=09
MNB-V2
Instance=1010
MS/TP Addr=10
MNB-V2
Instance=1011
MS/TP Addr=11
MNB-V2
Instance=1012
MS/TP Addr=12
MNB-V2
Instance=1013
MS/TP Addr=13
MNB-V2
Instance=1014
MS/TP Addr=14
MNB-V2
Instance=1015
MS/TP Addr=15
MNB-V2
Instance=1016
MS/TP Addr=16
MNB-V2
Instance=1024
MS/TP Addr=24
MNB-V2
Instance=1023
MS/TP Addr=23
MNB-V2
Instance=1022
MS/TP Addr=22
MNB-V2
Instance=1021
MS/TP Addr=21
MNB-V2
Instance=1020
MS/TP Addr=20
MNB-V2
Instance=1019
MS/TP Addr=19
MNB-V2
Instance=1018
MS/TP Addr=18
MNB-V2
Instance=1017
MS/TP Addr=17
MNB-V2
Instance=1025
MS/TP Addr=25
MNB-V2
Instance=1026
MS/TP Addr=26
MNB-V2
Instance=1027
MS/TP Addr=27
MNB-V2
Instance=1028
MS/TP Addr=28
MNB-V2
Instance=1029
MS/TP Addr=29
MNB-V2
Instance=1030
MS/TP Addr=30
MNB-V2
Instance=1031
MS/TP Addr=31
MNB-V2
Instance=1032
MS/TP Addr=32
MNB-V2
Instance=1040
MS/TP Addr=40
MNB-V2
Instance=1039
MS/TP Addr=39
MNB-V2
Instance=1038
MS/TP Addr=38
MNB-V2
Instance=1037
MS/TP Addr=37
MNB-V2
Instance=1036
MS/TP Addr=36
MNB-V2
Instance=1035
MS/TP Addr=35
MNB-V2
Instance=1034
MS/TP Addr=34
MNB-V2
Instance=1033
MS/TP Addr=33
To MNB-1000
(Instance=1000)
Key
EOL End-of-line resistor, 120 Ω (part
number EMSC-546).
*
See "MS/TP Requirements" in
this chapter.
Note: Only specific UL wiring and installation requirements
are shown. For complete installation and wiring
requirements, refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide, F-27360, and
other appropriate documentation listed in Appendix C.
Note: All references to the MNB-V1 equally apply to the
MNB-V1-2 and all references to the MNB-V2 equally
apply to the MNB-V2-2.
Figure–2.4 MNB-V1 and MNB-V2 Controller Topology.
High-rise Smoke Control
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 29
Page 46
Chapter 2
MNB-1000 Interface to FSCS
The MNB-1000 (Instance 2000) controller provides a complete interface to
the FSCS through its EIA-485 (RS-485) ADI ModBus interface (Figure–2.5).
It controls all the FSCS LEDs and monitors all the FSCS override switches.
The FSCS (panel) Enable switch functionality is also enforced through
programming in the MNB-1000 controller. Refer to Chapter 5, Restrictions
and General Comments, for an example of this programming and for
additional information on the FSCS interface.
When interfaced to the ADI FSCS, the MNB-1000 controller and its power
supply are mounted inside the FSCS enclosure, eliminating the need for
separate enclosures. This controller functions as the master of the
smoke-control network. It monitors communications to all of the controllers
that are part of the smoke-control system, distributes and receives global
information between controllers in the network, initiates smoke-control
sequences based on information received from the appropriate controllers,
and integrates the FSCS functionality into the system. Optionally, it can also
perform HVAC control functions.
Note: When using I/O points to interface to a UL 864 UUKL/UUKL7 Listed
FSCS in place of using an ADI FSCS that supports the ADI ModBus
protocol, many additional controllers will be required. Each installation must
be carefully assessed to ensure that adequate quantities of devices have
been allotted, to perform the necessary control and monitoring functions.
Refer to "Job Estimating" on page 78 for point calculating specifics.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
30
Page 47
High-rise Smoke Control
Key
EOL JPRa End-of-line resistor is engaged through an on-board
jumper on the MNB-1000. Refer to the MicroNet
BACnet MNB-1000 Plant Controller Installation
Instructions, F-27347, for additional information.
Remote I/O Inputs and outputs remotely provided by the ADI
ModBus interface. The Remote I/O Port refers to the top
EIA-485 port on the MNB-1000.
EOL JPRb End-of-line resistor is engaged through an on-board
jumper on the ADI FSCS. Refer to the documentation
shipped with the unit.
Note: Only specific UL wiring and installation requirements
are shown. For complete installation and wiring
requirements, refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide, F-27360, and
other appropriate documentation listed in Appendix C.
1 In this example, the MNB-1000 controller shown is
mounted inside the ADI FSCS enclosure, along with its
dedicated power supply. This is an option that can be
specified when ordering the ADI FSCS. Refer to
Chapter 5, "Restrictions and General Comments," for
additional information regarding the FSCS.
2 The UOJZ Listed N.O. contacts from the Fire Alarm
Panel (FAP) are wired to MNB-300 controllers. As an
option, additional contact inputs can be specified when
ordering the ADI FSCS, allowing the FAP contacts to be
wired directly to the FSCS. Should this option be used,
these controllers must be mounted within 20 ft. of the
FAP, and the I/O wiring must be run in conduit because
the I/O wiring between the FAP and the FSCS is
unsupervised.
3 All UUKL controllers must be mounted inside approved
enclosures. Refer to Chapter 5, "Restrictions and
General Comments" for additional information. When
the ADI FSCS is ordered with the MNB-1000 and its
power supply mounted internally, no additional
enclosures are required.
4 The path through the Ethernet/IP network from any one
UUKL device to another must only use UL 864 Listed
Ethernet/IP infrastructure devices.
5 If individual controllers use hard-wired I/O points to
interface to the FSCS, these controllers must be
mounted within 20 ft. of the FAP, and the I/O wiring
must be run in conduit because the I/O wiring is
unsupervised.
6 The ADI ModBus interface to the ADI FSCS uses the
Remote I/O Bus of the MNB-1000, not the MSTP Bus.
7 Remote I/O Bus wiring must adhere to the installation
requirements defined in Chapter 5, "Restrictions and
General Comments".
EOL
JPRb
Remote I/O Bus
(EIA-485, ADI ModBus)
EOL
JPRa
1
3
6
7
2
5
4
MNB-1000
Instance=2000
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
Remote I/O
Port (ADI)
Figure–2.5 MNB-1000 Interface to FSCS.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 31
Page 48
Chapter 2
Fire Alarm Panel Interface and Remaining System Topology
The MNB-1000 (Instance 3000) and the controllers beneath it provide
additional controlling and monitoring functions, as well as the Fire Alarm
Panel (FAP) interface. These controllers operate as follows:
• The MNB-1000 (Instance 3000) controller monitors the damper
proof-of-position switches for the five dedicated supply air dampers and
three of the dedicated exhaust air dampers associated with the
smoke-control zones. It distributes and receives global information
between controllers in the network, monitors communications to all of
the controllers beneath it, and initiates smoke-control sequences based
on information received from the appropriate controllers.
• The MNB-300 (Instance 3001) controller monitors the damper
proof-of-position switches for the remaining two dedicated exhaust air
dampers associated with the smoke-control zones. It distributes them to
the remaining controllers as required for smoke-control purposes.
• The MNB-300 (Instance 3002) controller interfaces to the UOJZ Fire
Alarm Panel to monitor stairwell duct smoke alarm and pull station
contacts. It provides control of the stairwell pressurization systems and
receives or distributes information to or from controllers as required for
smoke-control purposes.
• The MNB-300 (Instance 3003) controller also interfaces to the UOJZ
Fire Alarm Panel to monitor smoke alarm contacts associated with
Floors 1-5. It distributes this information to controllers as required for
smoke-control purposes.
• The B-LINK-AC MS/TP repeater is used to extend the distance of the
MS/TP bus and provide isolation between UUKL and non-UUKL Listed
devices. In this example, its main purpose is to isolate the trunk from
non-UUKL Listed controllers that are used for HVAC purposes and
perform no functions associated with smoke control.
• The remaining two devices (Instances 3004 and 3005), are not UUKL
Listed. They are isolated from the UUKL Listed controllers through use
of the B-LINK-AC repeater. These controllers perform HVAC functions
that are unrelated to smoke control.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
32
Page 49
MS/TP Bus
Figure–2.6 Fire Alarm Panel and Remaining Controllers.
High-rise Smoke Control
To MNB-1000
Instance=3000
*
UOJZ Listed
Fire Alarm Panel
SD
SD
SD
SD
SD
SD
SD
PS
PS
Floor 1 Smoke Alarm
Floor 2 Smoke Alarm
Floor 3 Smoke Alarm
Floor 4 Smoke Alarm
Floor 5 Smoke Alarm
Stair 1 Smoke Alarm
Stair 2 Smoke Alarm
Pull Station 1
Pull Station 2
1 Because the I/O wiring between the I/A Series BACnet
controllers and the UOJZ Listed Fire Alarm Panel (FAP) is
unsupervised, these controllers must be mounted within 20 ft.
of the FAP, and the I/O wiring must be run in conduit.
Note: Only specific UL wiring and installation requirements
are shown. For complete installation and wiring
requirements, refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide, F-27360, and
other appropriate documentation listed in Appendix C.
I/O
MNB-300
Instance=3001
MS/TP Addr=1
(Damper End Switch Proof)
MNB-300
I/O
Instance=3002
MS/TP Addr=2
(Stairwell Pressurization, Smoke
1
I/O
Alarms, and Pull Stations)
MNB-300
Instance=3003
MS/TP Addr=3
(Floor 1, 5 Smoke Alarms)
RS-232
RD TD
300
1200
2400
Baud Rate
9600
B-LINK-AC
19200
38400
EOL
Andover Controls
76800
Spare
RS-485
RD TD
5
RD TD
Power
4
+
RD TD
–
SHLD
3
+
RD TD
–
SHLD
2
+
RD TD
–
SHLD
1
+
–
SHLD
+
–
SHLD (Input)
L
N
Line Voltage
Selector
B-LINK-AC
MS/TP Repeater
115
(Used for MS/TP Isolation)
EOL
Non-UUKL Device
Instance=3004
MS/TP Addr=4
Key
EOL End-of-line resistor, 120 Ω (part no. EMSC-546)
See "MS/TP Requirements" in this chapter.
*
I/O Discrete input and output wiring to or from controlled
or monitored devices.
EOL
Non-UUKL Device
Instance=3005
MS/TP Addr=5
Comments
Always refer to the NFPA 92A, NFPA 92B, NFPA 72, and
UL 864 UUKL/UUKL7 standards for additional Smoke-Control Systems
information. Additionally, general system application comments and
restrictions are provided in Chapter 5, Restrictions and General Comments
and should be thoroughly reviewed to ensure compliance with the UL listing.
It is the responsibility of the field office to work with the smoke-control
system designer and gain the smoke-control system approval from the
Authority Having Jurisdiction (AHJ).
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 33
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Chapter 2
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 51
Chapter 3
Warehouse Smoke Control
Purpose
This application provides guidelines for using I/A Series Micronet BACnet
controllers in a single story warehouse (or similar single-story buildings with
large open spaces) that require the UL 864 UUKL/UUKL7 listing for
Smoke-Control Systems. This application utilizes only nondedicated
smoke-control equipment. Multiple MNB-1000 controllers are used to
perform the HVAC functions when in normal control mode. When in the
smoke-control mode, they perform the required smoke-control sequences
by controlling the individual air handling unit (AHU) fans and dampers
(supply, exhaust, and return). One MNB-1000 controller monitors the N.O.
relay contacts of a UOJZ Listed fire alarm panel for automatic activation of
the smoke-control sequences, and monitors the UUKL Listed Firefighter’s
Smoke Control Station (FSCS) for manual activation and overrides. This
controller also provides control of the FSCS visual and audible status
indicators.
Sequence of Operation
Normal HVAC Control
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 35
Under normal conditions, each AHU follows an occupied schedule that
determines when that AHU operates. In the case of the warehouse, a central
occupied schedule is used for all of the units. During the unoccupied mode,
the outdoor and exhaust air dampers are in the full-closed positions. The
return air dampers are in the full-open positions. The supply and return fans
are commanded OFF. During the occupied mode, the supply and return fans
are commanded ON. The outdoor, exhaust, and return air dampers
modulate in conjunction with typical heating and/or cooling coils or
equipment to maintain the zone temperature setpoint associated with the
respective AHU.
Each AHU can have a wide variety of additional control sequences that
determine its operation and establish its operating priorities (for example,
low limit stats and minimum outdoor air). One MNB-1000 controller is used
for each AHU. Each one provides the basic control of the AHU and the
monitoring of end process verification sensors, such as flow switches and
position indication switches.
Page 52
Chapter 3
The Fire Alarm Panel (i.e. Listed Fire Alarm Control Unit) is the primary indicator
for fire alarm conditions. It is also the primary initiator of the automatic smoke/fire
alarm sequence. Upon detection of smoke or fire, a set of contacts in the Fire
Alarm Panel (for the zone affected) close, indicating to the I/A Series BACnet
building automation system that a smoke/fire condition exists. In this application, a
smoke detector is provided for each zone (smoke-control zone) and each zone
consists of the area served by a single AHU. The contacts from the Fire Alarm
Panel for the associated smoke detectors are monitored by the MNB-1000
controller associated with the FSCS.
Note: Any UOJZ listed fire alarm panel with programmable N.O. relay contacts
can be used with I/A Series BACnet controllers.
The Automation Displays, Inc. Firefighter’s Smoke Control Station (i.e. Listed
Smoke Control Panel) is the primary indicator for the status of all smoke control
and related HVAC equipment. It also provides the interface for manual activation
commands and overrides for all smoke-control related equipment. An MNB-1000
controller is mounted internal to the FSCS and provides the ADI ModBus (control)
interface to the FSCS. This controller is the central coordinator of all
smoke-control activity. All commands issued from the FSCS are monitored and
distributed throughout the network as required to implement the manual
smoke-control sequences and overrides. The status of all of the smoke-control
systems and equipment, as well as HVAC monitored trouble signals, are returned
to the FSCS for visual indication and, in some cases, audible annunciation. Spare
I/O points that exist on this controller may be used for other control purposes, if
required.
Smoke Control Sequences
Note: Any UUKL listed FSCS can be used with I/A Series BACnet controllers, but
only the Automation Displays, Inc. unit supports the ADI ModBus interface. When
an FSCS from other vendors is used, many additional controllers will be required
to provide the individual I/O point interfaces.
In this application, the complete smoke-control system is considered
nondedicated. Therefore, the smoke-control equipment does not require an
automatic self-test. Since this equipment consists of HVAC components that are
operated on a regular basis, the normal “comfort” level associated with the
operability or inoperability of the equipment is considered an acceptable means of
maintaining system integrity. Fan operation is verified using differential pressure
sensors. Supply, exhaust, and return air damper positions are verified by
monitoring end-of-travel switches.
This application uses only one type of smoke-control system to implement the
smoke-control strategy. This system consists of zoned smoke control. Zoned
smoke control divides a building into a number of zones for the purpose of
inhibiting smoke movement.
smoke barriers. In the event of a fire, pressure differences and airflows produced
by mechanical fans and operating dampers are used to limit the smoke to the
zone in which the fire originated.
74.National Fire Protection Association, Inc., NFPA 92A, Standard for Smoke-Control
Systems Utilizing Barriers and Pressure Differences, NFPA 92A, 2009 ed., chap. 5,
para. 5.5.1.1.
74
The zones are separated from each other by
75
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 53
Warehouse Smoke Control
Each area of the warehouse that is served by an AHU is considered a
smoke-control zone. When smoke is detected in any zone, all of the
nonsmoke zones that are contiguous to the smoke zone, or optionally, all
nonsmoke zones in the building,
is exhausted from the smoke zone. Pressurization of the noncontiguous
(optional) smoke-control zones is dependent upon the smoke-control
system design and its associated specification. Regardless of whether or not
the noncontiguous smoke-control zones are positively pressurized, sufficient
differential pressure must be achieved to limit smoke spread to the zone in
which the fire originated.
Anytime a smoke/fire detector trips, an automatic smoke-control sequence is
initiated. For example, if the smoke/fire detector for smoke-control Zone 5
trips first, the automatic smoke-control sequence is initiated in the following
manner:
1. The AHU-5 supply fan is commanded OFF and the return fan is
commanded ON. The return and outdoor air dampers are driven to their
full-closed positions. The exhaust air damper is driven to the full-open
position. This prevents any outdoor or return air from being delivered, by
AHU-5, to the zone reporting the smoke condition. It also allows
maximum exhausted air to be expelled from the smoke zone.
76
are positively pressurized and the smoke
2. The AHU-1, AHU-2, AHU-3, AHU-4, and AHU-6 supply fans are
commanded ON and their return fans are commanded OFF. Their
associated return and exhaust air dampers are driven to the full-closed
positions. Their outdoor air dampers are driven full-open. This allows
outdoor air to be delivered to each of the smoke-control zones that are
contiguous to the zone reporting the smoke condition. This fresh air is
used to positively pressurize the nonsmoke zones.
3. The automatic smoke-control sequence takes priority over the normal
HVAC control sequences and any HVAC control overrides. Static
pressure high limits and duct smoke detectors on supply air systems
should not be automatically overridden.
77
4. Once the automatic activation has occurred, subsequent alarm signals
that would normally initiate an automatic smoke-control sequence will
annunciate only. (For example if, in addition to the AHU-5 smoke/fire
detector, the AHU-6 detector also trips, no change to the smoke-control
sequence occurs and the AHU-6 smoke condition also annunciates at
the FSCS.)
5. At any time, the FSCS is capable of overriding either partially, or in full,
any automatic activation of a smoke-control sequence that may be in
process.
78
6. The communications between all of the I/A Series BACnet controllers
that are part of the smoke-control sequences must be monitored. If the
communications between any of these controllers fails, at any time, the
system trouble LED at the FSCS must illuminate and an audible signal
must be generated.
79
75.NFPA 92A, 2009 ed., annex A, para. A.5.5.
76.NFPA 92A, 2009 ed., annex A, para. A.5.5.1.1.1.
77.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.2 and 6.4.5.2.1.2.
78.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 37
Page 54
Chapter 3
7. If any of the smoke-control equipment proof sensors fail to operate within a
specified period of time during the smoke-control sequence or when under
control of the FSCS, the system trouble LED at the FSCS illuminates and an
audible signal is generated.
If the smoke/fire detector for AHU-6 trips first, the automatic smoke-control
sequence is initiated in the following manner:
1. The AHU-6 supply fan is commanded OFF and the return fan is commanded
ON. The return and outdoor air dampers are driven to their full-closed
positions. The exhaust air damper is driven to the full-open position. This
prevents any outdoor or return air from being delivered, by AHU-6, to the zone
reporting the smoke condition. It also allows maximum exhausted air to be
expelled from the smoke zone, and negative pressurization in the area where
the smoke was detected.
2. The AHU-1, AHU-2, AHU-3, AHU-4 and AHU-5 supply fans are commanded
ON and their return fans are commanded OFF. Their associated return and
exhaust air dampers are driven to the full-closed positions. The outdoor air
dampers are driven full-open. This allows outdoor air to be delivered to each
of the smoke-control zones. This outdoor air is used to positively pressurize the
nonsmoke zones. Controlling AHU-3 and AHU-4 in this manner is considered
optional since these zones are not contiguous to the smoke zone.
3. The automatic smoke-control sequence takes priority over the normal HVAC
control sequences and any HVAC control overrides. Static pressure high limits
and duct smoke detectors on supply air systems should not be automatically
overridden.
80
4. Once the automatic activation has occurred, subsequent alarm signals that
would normally initiate an automatic smoke-control sequence will annunciate
only. (For example if, in addition to the AHU-6 smoke/fire detector, the AHU-2
detector also trips, no change to the smoke-control sequence occurs and the
AHU-2 smoke condition also annunciates at the FSCS.)
5. At any time, the FSCS is capable of overriding either partially, or in full, any
automatic activation of a smoke-control sequence that may be in process.
81
6. The communications between all of the I/A Series BACnet controllers that are
part of the smoke-control sequences must be monitored. If the
communications between any of these controllers fails, at any time, the system
trouble LED at the FSCS must illuminate and an audible signal must be
generated.
82
7. If any of the smoke-control equipment proof sensors fail to operate within a
specified period of time during the smoke-control sequence or when under
control of the FSCS, the system trouble LED at the FSCS illuminates and an
audible signal is generated.
79.Underwriters Laboratories Inc., UL 864, Control Units and Accessories for Fire Alarm
Systems, 9th ed. (2003), para’s 48.5, 49.4, 49.6, and 49.7.
80.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.2 and 6.4.5.2.1.2.
81.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
82.UL 864, 9th ed., para’s 48.5, 49.4, 49.6, and 49.7.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
38
Page 55
Warehouse Smoke Control
Smoke-Control System Configuration Schedule
Each smoke-control system configuration should be defined in a schedule.83 The
schedule should list all dedicated and nondedicated equipment and show the
equipment response for each sensor that activates an automatic smoke-control
sequence. An example schedule for this application is shown below (Table–3.1).
Note:
• According to NFPA 92A, only the smoke zones that are contiguous to the
zone reporting the smoke condition have to be positively pressurized. For this
application, all non-smoke zones are being positively pressurized.
• Pressurization of the noncontiguous (optional) smoke-control zones is
dependent upon the smoke-control system design and its associated
specification. Regardless of whether or not noncontiguous smoke-control
zones are positively pressurized, sufficient differential pressure must be
achieved to ensure smoke spread is confined to the zone in which the fire
originated.
Table–3.1 Schedule for Smoke-Control System Configuration .
Zone 1
Nondedicated Smoke
Control Equipment
AHU-1 Supply Fan OFF ON ON ON ON ON
AHU-1 Return Fan ON OFF OFF OFF OFF OFF
AHU-1 O.A. Damper Full Closed Full Open Full Open Full Open Full Open Full Open
AHU-1 Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Closed
AHU-1 Exhaust Damper Full Open Full Closed Full Closed Full Closed Full Closed Full Closed
Smoke Control Zone 1 Neg. Press. Pos. Press. Pos. Press. Pos. Press. Pos. Press. Pos. Press.
AHU-2 Supply Fan ON OFF ON ON ON ON
AHU-2 Return Fan OFF ON OFF OFF OFF OFF
AHU-2 O.A. Damper Full Open Full Closed Full Open Full Open Full Open Full Open
AHU-2 Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Closed
AHU-2 Exhaust Damper Full Closed Full Open Full Closed Full Closed Full Closed Full Closed
Smoke Control Zone 2 Pos. Press. Neg. Press. Pos. Press. Pos. Press. Pos. Press. Pos. Press.
AHU-3 Supply Fan ON ON OFF ON ON ON
AHU-3 Return Fan OFF OFF ON OFF OFF OFF
AHU-3 O.A. Damper Full Open Full Open Full Closed Full Open Full Open Full Open
AHU-3 Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Closed
AHU-3 Exhaust Damper Full Closed Full Closed Full Open Full Closed Full Closed Full Closed
Smoke Control Zone 3 Pos. Press. Pos. Press. Neg. Press. Pos. Press. Pos. Press. Pos. Press.
AHU-4 Supply Fan ON ON ON OFF ON ON
AHU-4 Return Fan OFF OFF OFF ON OFF OFF
AHU-4 O.A. Damper Full Open Full Open Full Open Full Closed Full Open Full Open
AHU-4 Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Closed
AHU-4 Exhaust Damper Full Closed Full Closed Full Closed Full Open Full Closed Full Closed
Smoke
Detector
in Alarm
Zone 2
Smoke
Detector
in Alarm
Zone 3
Smoke
Detector
in Alarm
Zone 4
Smoke
Detector
in Alarm
Zone 5
Smoke
Detector
in Alarm
Zone 6
Smoke
Detector
in Alarm
83.NFPA 92A, 2009 ed., chap. 6, para 6.4.5.3 and annex A, para A.6.4.5.3.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 39
Page 56
Chapter 3
Table–3.1 Schedule for Smoke-Control System Configuration (Continued).
Zone 1
Nondedicated Smoke
Control Equipment
Smoke Control Zone 4 Pos. Press. Pos. Press. Pos. Press. Neg. Press. Pos. Press. Pos. Press.
AHU-5 Supply Fan ONONONONOFFON
AHU-5 Return Fan OFF OFF OFF OFF ON OFF
AHU-5 O.A. Damper Full Open Full Open Full Open Full Open Full Closed Full Open
AHU-5 Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Closed
AHU-5 Exhaust Damper Full Closed Full Closed Full Closed Full Closed Full Open Full Closed
Smoke Control Zone 5 Pos. Press. Pos. Press. Pos. Press. Pos. Press. Neg. Press. Pos. Press.
AHU-6 Supply Fan ONONONONONOFF
AHU-6 Return Fan OFF OFF OFF OFF OFF ON
AHU-6 O.A. Damper Full Open Full Open Full Open Full Open Full Open Full Closed
AHU-6 Return Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Closed
AHU-6 Exhaust Damper Full Closed Full Closed Full Closed Full Closed Full Closed Full Open
Smoke Control Zone 6 Pos. Press. Pos. Press. Pos. Press. Pos. Press. Pos. Press. Neg. Press.
Smoke
Detector
in Alarm
Zone 2
Smoke
Detector
in Alarm
Zone 3
Smoke
Detector
in Alarm
Zone 4
Smoke
Detector
in Alarm
Zone 5
Smoke
Detector
in Alarm
Zone 6
Smoke
Detector
in Alarm
Firefighter’s Smoke Control Station (FSCS)
The requirements of the FSCS are similar to the ones shown in Chapter 2. The
graphic depiction and smoke-control equipment used changes based on the
sequence of operation for this application.
System Topologies
Warehouse Building Layout
In this application there are six individual AHUs, with each controlling the space
temperatures for their associated zone (Figure–3.1 and Figure–3.2). Each AHU is
controlled by a single MNB-1000 controller. These devices (Instances 10 through
60) monitor and control all of the I/O points that provide the normal HVAC control
(including control priorities such as low limit stats, filter, etc.). Additionally, the end
process verification sensors for the smoke-control equipment are monitored.
These sensors would typically consist of flow switches and end switches that are
associated with the supply and return fans, as well as the supply, return, and
exhaust dampers. The proof sensor information is distributed throughout the
network as required to perform the smoke-control strategies and update the
FSCS. Events that initiate automatic and manual activation of smoke-control
strategies are monitored by a separate MNB-1000 (Instance 70) controller in the
network. It distributes the information to these controllers for implementation and
subsequent feedback. Each zone controlled by an AHU is considered a
smoke-control zone; therefore, the warehouse has six smoke-control zones.
The MNB-1000 (Instance 70) controller provides a complete interface to the
FSCS through its EIA-485 (RS-485) ADI ModBus interface. It is mounted inside
the FSCS, along with its power supply. This controller functions as the master of
the Smoke Control network because it monitors communications to all the
controllers that are part of the smoke-control system, distributes and receives
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
40
Page 57
Warehouse Smoke Control
global information between controllers in the network, initiates smoke-control
sequences based on information received from the appropriate controllers, and
provides additional HVAC control.
Ethernet/IP Infrastructure
Any UL 864 Listed IP infrastructure devices can be used to create the network
topology. Currently, the only available units are the EIS8-100T and EIS6-100T/FT
switching hubs from Contemporary Controls. The path through the Ethernet/IP
network from any one UUKL device to another must use only UL 864 Listed
infrastructure devices. The Ethernet/IP Smoke-Control System can coexist with
the non-UL 864 networks, as long as they are isolated from those networks
through the use of UL 864 Listed IP infrastructure devices. Refer to Chapter 5,
Restrictions and General Comments, for additional information.
Note: At no time can any smoke control signals be passed over the public
Internet.
Wiring Requirements
Since the I/O wiring between the I/A Series BACnet controllers and the FSCS
(when an I/O wiring interface is used) and the UOJZ Fire Alarm Panel is
unsupervised, the I/A Series BACnet controllers used for this purpose must be
mounted within 20 ft of the panel to which they are connected. The I/O wiring must
be run in conduit. Table–3.2, below, lists the general requirements for the wiring
associated with an I/A Series BACnet smoke-control application.
Table–3.2 Wiring Requirements.
Wiring Status
Ethernet/IP Supervised by block programming
Supervised by block programming. When MNB-1000 is
EIA-485 ADI ModBus
MS/TP Bus Supervised by block programming
I/O to FSCS
I/O to UOJZ FAP Contacts
mounted external to the FSCS, wiring must be run in
conduit and controller must be located within 20 ft. of the
panel.
Unsupervised, wiring must be run in conduit and controllers
must be located within 20 ft. of the panel.
Unsupervised, wiring must be run in conduit and controllers
must be located within 20 ft. of the panel.
Remaining I/O Unsupervised
Central System Interface and Overlay Devices
When a UNC, Web Server, and/or other central-system type interfaces are
attached to the Ethernet/IP network with the ability to access the smoke-control
system, they must be isolated from the network through the use of UL 864 Listed
IP infrastructure devices (Figure–3.2). This isolation is required by UL because
these devices, PC’s and/or interfaces, are not UL 864 Listed. Therefore these
devices cannot be used for smoke-control purposes.
Refer to Chapter 5, Restrictions and General Comments, for additional
information.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 41
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Chapter 3
AHU-1
Smoke Control
Zone 1
AHU-2
Smoke Control
Zone 2
AHU-3
Smoke Control
Zone 3
AHU-4
Smoke Control
Zone 4
AHU-5
Smoke Control
Zone 5
AHU-6
Smoke Control
Zone 6
EOL
JPR
Remote I/O Bus
(EIA-485, ADI ModBus)
To FSCS
To available ports
on UL 864 Listed
Ethernet/IP
Switching Hub
Note: Only specific UL wiring and installation requirements are shown. For
complete installation and wiring requirements, refer to the I/A Series
MicroNet BACnet Wiring and Networking Practices Guide, F-27360,
and other appropriate documentation listed in Appendix C.
Remote I/O
Port (ADI)
1
2
1 The ADI ModBus interface to the ADI FSCS
uses the Remote I/O Bus of the MNB-1000,
not the MSTP Bus.
2 Remote I/O Bus wiring must adhere to the
installation requirements defined in Chapter 5,
"Restrictions and General Comments".
Key
EOL JPR End-of-line resistor and/or bias resistors
are engaged through on-board jumpers.
Remote I/O Inputs and outputs remotely provided by
the ADI ModBus interface. The Remote
I/O Port refers to the top EIA-485 port
on the MNB-1000.
I/O Discrete input and output wiring to or
from controlled or monitored devices.
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
MNB-1000
Instance=10
MS/TP Addr=0
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
MNB-1000
Instance=20
MS/TP Addr=0
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
MNB-1000
Instance=40
MS/TP Addr=0
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
MNB-1000
Instance=50
MS/TP Addr=0
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
MNB-1000
Instance=60
MS/TP Addr=0
MNB-1000
Instance=30
MS/TP Addr=0
MNB-1000
Instance=70
Figure–3.1 Warehouse Building Layout.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Warehouse Smoke Control
MNB-1000 Interface to FSCS
The MNB-1000 (Instance 70) controller provides a complete interface to the
FSCS through its EIA-485 (RS-485) ADI ModBus interface (Figure–3.3). It
controls all the FSCS LEDs and monitors all the FSCS override switches. The
FSCS (panel) Enable switch functionality is also enforced through programming in
the MNB-1000 controller. Refer to Chapter 5, Restrictions and General Comments
for an example of this programming and for additional information on the FSCS
interface.
When interfaced to the ADI FSCS, the MNB-1000 controller and its power supply
are mounted inside the FSCS enclosure, eliminating the need for separate
enclosures. This controller functions as the master of the smoke-control network.
It monitors communications to all of the controllers that are part of the
smoke-control system, distributes and receives global information between
controllers in the network, initiates smoke-control sequences based on
information received from the appropriate controllers, and integrates the FSCS
functionality into the system. Optionally, it can also perform HVAC control
functions.
Note: When using I/O points to interface to a UL 864 UUKL/UUKL7 Listed FSCS
in place of using an ADI FSCS that supports the ADI ModBus protocol, many
additional controllers will be required. Each installation must be carefully
assessed to ensure that adequate quantities of devices have been allotted to
perform the necessary control and monitoring functions. Refer to "Job Estimating"
on page 78 for point calculating specifics.
Fire Alarm Panel Interface
The UOJZ Listed N.O. contacts from the Fire Alarm Panel are wired directly to
contact inputs of the FSCS (Figure–3.3). When ordering the ADI FSCS, contact
inputs can be specified for this purpose. When this option is used, the FSCS and
the FAP device supplying the contacts must be mounted within 20 ft. of each
other, and the I/O wiring must be run in conduit because the I/O wiring is
unsupervised.
When the FAP is interfaced to the FSCS in this manner, the statuses of the smoke
alarms are received from the FSCS by the MNB-1000 (Instance 70) controller and
distributed throughout the network, as required, to support the smoke-control
sequence.
Note: When using controller I/O points to interface to UOJZ Listed N.O. contacts
from a Fire Alarm Panel (instead of contact inputs of the ADI FSCS), several
additional controllers will be required. Each installation must be carefully
assessed to ensure that adequate quantities of devices have been allotted to
perform the necessary control and monitoring functions. Refer to "Job Estimating"
on page 78 for point calculating specifics.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 43
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Chapter 3
Ethernet/IP
Ethernet/IP
Ethernet/IP
Web Access-1
(Internet Explorer)
Web Access-2
(Internet Explorer)
To remainder of
building's IT
network that is
not UUKL
To Any additional
controllers that are
part of the UUKL
control system
UNC-1
(UNC-520-2)
Instance=5000
EIS8-100T
Switching Hub
EIS6-100T/FT
Switching Hub
NW # 864
I/O
MNB-1000
Instance=10
To AHU-1 control
and end process
verification devices
2
1
1
3
3
3
3
4
2
3
4
4
5
6
NW # 864
I/O
MNB-1000
Instance=20
To AHU-1 control
and end process
verification devices
4
5
6
NW # 864
I/O
MNB-1000
Instance=30
MNB-1000
Instance=40
To AHU-1 control
and end process
verification devices
4
5
6
NW # 864
I/O
To AHU-1 control
and end process
verification devices
4
5
6
NW # 864
I/O
MNB-1000
Instance=50
To AHU-1 control
and end process
verification devices
4
5
6
NW # 864
I/O
MNB-1000
Instance=60
To AHU-1 control
and end process
verification devices
4
5
6
EOL
JPR
MNB-1000
Instance=70
Remote I/O Bus
(EIA-485, ADI ModBus)
To FSCS
4
5
6
Note: Only specific UL wiring and installation
requirements are shown. For complete
installation and wiring requirements, refer
to the I/A Series MicroNet BACnet Wiring
and Networking Practices Guide,
F-27360, and other appropriate
documentation listed in Appendix C.
1 At no time can any smoke control signals
be passed over the public Internet.
2 The UL 864 Ethernet switches shown
must be installed in UL-50 enclosures.
3 The UL 864 Listed Ethernet switches can be used to provide isolation of
non-UUKL devices from the UUKL Ethernet network. Refer to Chapter 5,
"Restrictions and General Comments," for additional information regarding the
use of Ethernet/IP networks and approved devices.
4 The path through the Ethernet/IP network from any one UUKL device to
another must only use UL 864 Listed Ethernet/IP infrastructure devices.
5 All UUKL controllers must be mounted in approved enclosures. Refer to
Chapter 5, "Restrictions and General Comments," for additional information.
6 See "Wiring Requirements" in this chapter.
7 The ADI ModBus interface to the ADI FSCS uses the Remote I/O Bus of the
MNB-1000, not the MSTP Bus.
8 Remote I/O Bus wiring must adhere to the installation requirements defined
in Chapter 5, "Restrictions and General Comments".
Remote I/O
Port (ADI)
7
8
Key
EOL JPR End-of-line resistor and/or bias
resistors are engaged through
on-board jumpers.
Remote I/O Inputs and outputs remotely provided
by the ADI ModBus interface. The
Remote I/O Port refers to the top
EIA-485 port on the MNB-1000.
I/O Discrete input and output wiring to or
from controlled or monitored devices.
NW Network
Figure–3.2 Ethernet/IP Network Topology.
44
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
Page 61
Warehouse Smoke Control
Figure–3.3 FSCS Interface, UOJZ Fire Alarm Panel Interface, and Related MNB-1000 Controller.
UOJZ Listed
Fire Alarm Panel
SD
SD
SD
SD
SD
SD
1 In this example, the MNB-1000 controller shown is
mounted inside the ADI FSCS enclosure, along with
its dedicated power supply. This is an option that can
be specified when ordering the ADI FSCS. Refer to
Chapter 5, "Restrictions and General Comments," for
additional information regarding the FSCS.
2 The UOJZ Listed N.O. contacts from the Fire Alarm Panel
(FAP) are wired directly to contact inputs of the FSCS. When
ordering the ADI FSCS, contact inputs can be specified for this
purpose. When this option is used, the FAP device with the
contacts and the FSCS must be mounted within 20 ft. of each
other, and the I/O wiring must be run in conduit because the
I/O wiring is unsupervised.
3 All UUKL controllers must be mounted inside approved
enclosures. Refer to Chapter 5, "Restrictions and General
Comments" for additional information. When the ADI FSCS is
ordered with the MNB-1000 and its power supply mounted
internally, no additional enclosures are required.
4 The path through the Ethernet/IP network from any one UUKL
device to another must only use UL 864 Listed Ethernet/IP
infrastructure devices.
5 If individual controllers use hard-wired I/O points to interface to
the FSCS, these controllers must be mounted within 20 ft. of
the FAP, and the I/O wiring must be run in conduit because
the I/O wiring is unsupervised.
6 The ADI ModBus interface to the ADI FSCS uses the
Remote I/O Bus of the MNB-1000, not the MSTP Bus.
7 Remote I/O
requirements defined in Chapter 5, "Restrictions and General
Comments".
Note: Only specific UL wiring and installation
requirements are shown. For complete
installation and wiring requirements,
refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide,
F-27360, and other appropriate
documentation listed in Appendix C.
Zone 1 Smoke Alarm
Zone 2 Smoke Alarm
Zone 3 Smoke Alarm
Zone 4 Smoke Alarm
Zone 5 Smoke Alarm
Zone 6 Smoke Alarm
Bus wiring must adhere to the installation
I/O
2
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
(EIA-485, ADI ModBus)
4
Remote I/O Bus
6
7
EOL JPRb
Remote I/O
Port (ADI)
EOL
JPRa
Smoke Control Panel
AHU-1
AHU-2
AHU-3
Zone 1
AHU-6
Zone 2
AHU-5
Zone 3
AHU-4
Zone 6
Zone 5
Zone 4
Key
EOL JPRa End-of-line resistor is engaged through an
EOL JPRb End-of-line resistor is engaged through an
Remote I/O Inputs and outputs remotely provided by the
I/O Discrete input and output wiring to or from
on-board jumper on the MNB-1000. Refer to the
MicroNet BACnet MNB-1000 Plant Controller
Installation Instructions, F-27347, for additional
information.
on-board jumper on the ADI FSCS. Refer to the
documentation shipped with the unit.
ADI ModBus interface. The Remote I/O Port
refers to the top EIA-485 port on the MNB-1000.
controlled or monitored devices.
MNB-1000
Instance=70
1
3
5
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 45
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Chapter 3
Comments
Always refer to the NFPA 92A, NFPA 92B, NFPA 72, and
UL 864 UUKL/UUKL7 standards for additional Smoke-Control Systems
information. Additionally, general system application comments and
restrictions are provided in Chapter 5, Restrictions and General Comments
and should be thoroughly reviewed to ensure compliance with the UL listing.
It is the responsibility of the field office to work with the smoke-control
system designer and gain the smoke-control system approval from the
Authority Having Jurisdiction (AHJ).
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Chapter 4
Campus Smoke Control
Purpose
This application provides guidelines for using I/A Series MicroNet BACnet
controllers on a large campus that requires the UL 864 UUKL/UUKL7 listing
for Smoke-Control Systems. This application uses MNB-300, MNB-Vx, and
MNB-1000 controllers that perform the HVAC functions when in normal
control mode. When in the smoke-control mode, they perform the required
smoke-control sequences by controlling the individual terminal boxes,
dedicated smoke-control dampers, and central air handling unit (AHU) fans.
Additionally, they control all supply, exhaust, and return air dampers, and
provide the feedback of all required end-process verification. The I/A Series
BACnet controllers monitor N.O. relay contacts of a UOJZ Listed fire alarm
panel for automatic activation of the smoke-control sequences, and monitor
UUKL Listed Firefighter’s Smoke Control Stations (FSCS) for manual
activations and overrides. This example uses multiple ADI FSCSs that
support the ADI ModBus interface to their respective MNB-1000 controllers.
Each interface provides control of all of the FSCS’s visual and audible status
indicators, as well as receipt of the FSCS’s override commands, eliminating
the need to allocate numerous additional controllers to interface to the FSCS
through individual I/O points.
Sequence of Operation
Normal HVAC Control
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 47
Note: This application example assumes that each of the campus buildings
are identical, therefore, the control equipment and sequences are the same
for each building.
Under normal conditions, the central AHU for each building follows an
occupied schedule that determines when the AHU operates. During the
unoccupied mode, the outdoor and exhaust air dampers are in the
full-closed position. The return air damper is in the full-open position. The
supply and return fans are commanded OFF. During the occupied mode, the
supply and return fans are commanded ON and the outdoor, exhaust, and
return air dampers modulate as required to maintain a mixed air temperature
setpoint. The central AHU can have a wide variety of additional control
sequences that determine its operation and establish its operating priorities
(for example, low limit stats and minimum outdoor air).
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Chapter 4
Each supply damper in a room consists of a terminal box controlled by an
MNB-V2 and a dedicated motor-driven damper controlled by a digital output
(DO) point from the same MNB-V2. The dedicated supply air damper
remains in the full-open position at all times, unless commanded otherwise
as a result of a smoke-control related condition. During normal, occupied
mode conditions, the terminal box supply dampers maintain their respective
zone temperature setpoints by modulating the primary air dampers and the
hot water reheat. During the unoccupied mode, the terminal boxes either
maintain their unoccupied zone temperature setpoints or drive to a fixed
position.
Note: UL’s acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone
drops below 50% of its maximum with its dedicated exhaust damper fully
open. If the damper’s response time is acceptable (less than 75 seconds)
under this condition, and proper pressurization is achieved, dedicated
supply air dampers are not necessary solely to meet response time
requirements. In all cases, exhaust and supply air dampers should continue
to be driven to their full-open and full-closed positions. The smoke-control
system’s design and its associated specification will dictate whether
additional requirements apply to the supply air dampers.
The exhaust air dampers associated with each room (smoke-control zone)
are considered dedicated smoke-control systems. These dampers are
always in the full-open position unless commanded otherwise due to a
smoke-control situation. The dampers are controlled by digital output (DO)
points from the MNB-V2 controllers in their respective zones.
The Fire Alarm Panel (i.e. Listed Fire Alarm Control Unit) is the primary
indicator for fire alarm and smoke detector conditions. It is also the primary
initiator of the automatic smoke or fire alarm sequence. Upon detection of
smoke and/or fire, a set of contacts in the Fire Alarm Panel (for the zone
affected) close, indicating to the building automation system that a smoke or
fire condition exists. In this application, a smoke detector is provided for
each room (smoke-control zone). The contacts from the Fire Alarm Panel for
the associated smoke detectors are monitored by the FSCS’s MNB-1000
controllers. A single fire alarm panel may be located in a central building that
handles all the remote buildings, or a separate fire alarm panel can be
located in each protected building. The application of the panels is
dependent upon the UL listings and NFPA 72 codes for which the panels are
approved. In this application, a separate Fire Alarm Panel is located in each
building. Check with the fire alarm panel’s manufacturer to determine which
listings and approvals apply to the specific models. For additional
information, refer to the applicable UL and NFPA 72 codes.
Note: Any UOJZ Listed fire alarm panel with programmable N.O. relay
contacts can be used with I/A Series BACnet controllers.
The ADI Firefighter's Smoke Control Station (i.e. Listed Smoke Control
Panel) is the primary indicator for the status of all smoke control and related
HVAC equipment. It also provides the interface for manual activation
commands and overrides for all smoke-control related equipment. An
MNB-1000 controller is mounted internal to the FSCS and provides the ADI
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
48
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Campus Smoke Control
ModBus (control) interface to the FSCS. All commands issued from the
FSCS are monitored and distributed throughout the network as required to
implement the manual smoke-control sequences and overrides. The status
of all of the smoke-control systems and equipment, as well as HVAC
monitored trouble signals, are returned to the FSCS for visual indication, and
in some cases, audible annunciation. Each MNB-1000 on an FSCS will be
the central coordinator of all smoke-control activity for its respective building.
Note: Any UUKL Listed FSCS can be used with I/A Series BACnet
controllers, but only the unit from Automation Displays, Inc. supports the ADI
ModBus interface. When an FSCS from other vendors is used, many
additional controllers will be required to provide the individual I/O point
interfaces.
During normal operating conditions, the nondedicated smoke-control
equipment does not require an automatic self-test since this equipment
consists of HVAC components that are operated on a regular basis. The
normal “comfort” level associated with the operability or inoperability of the
equipment is considered an acceptable means of maintaining system
integrity.
Dedicated smoke-control equipment, however, is used only when a
smoke-control situation occurs, therefore an automatic weekly self-test of
each dedicated smoke-control function is required. In this application, fan
operation is verified using differential pressure sensors. The MNB-V2
damper position is verified by monitoring the cubic feet per minute (CFM)
flow from the terminal box and/or its integral damper position feedback.
Damper end switches are used to verify the end stroke of all dedicated
supply and exhaust motor-driven dampers. All end process verifications of
the dedicated zone dampers are monitored by UI points on the MNB-V2
controller associated with each zone. If a valid proof of each function occurs,
no annunciation needs to take place. Otherwise, if the expected proof
sensor does not operate as required, an audible trouble signal is generated
and an LED is illuminated at the FSCS indicating the specific device that did
not operate.
Smoke Control Sequences
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 49
In this application, zoned smoke-control systems are used to implement the
smoke-control strategies. Both dedicated and nondedicated smoke-control
equipment are utilized as part of the zoned smoke-control systems.
Zoned smoke control divides a building into a number of zones for the
purpose of inhibiting smoke movement.
each other by smoke barriers. In the event of a fire, pressure differences and
airflows produced by mechanical fans and operating dampers limit the
smoke to the zone in which the fire originated.
In this application, each room on each floor of a building is considered a
smoke-control zone. When smoke is detected in any zone, all of the
nonsmoke zones that are contiguous to the smoke zone, and optionally, all
84.National Fire Protection Association, Inc., NFPA 92A, Standard for Smoke-Control
Systems Utilizing Barriers and Pressure Differences, NFPA 92A, 2009 ed.,
chap. 5, para. 5.5.1.1.
85.NFPA 92A, 2009 ed., annex A, para. A.5.5.
84
The zones are separated from
85
Page 66
Chapter 4
nonsmoke zones in the building,86 are positively pressurized and the smoke is
exhausted from the smoke zone. Pressurization of the noncontiguous (optional)
smoke-control zones is dependent upon the smoke-control system design and its
associated specification. Regardless of whether or not the noncontiguous
smoke-control zones are positively pressurized, sufficient differential pressure
must be achieved to limit smoke spread to the zone in which the fire originated.
Note: It is assumed that the smoke-control systems designer has considered all
internal perimeters of the smoke-control zones such as corridors, restrooms, and
closets. These internal perimeters require adequate pressurization that may not
be achievable without supplementary fans or other mechanical equipment.
Anytime a smoke/fire detector trips, an automatic smoke-control sequence is
initiated. For example, if the smoke/fire detector for Zone 6 of a building trips first,
the automatic smoke-control sequence is initiated in the following manner.
1. The central AHU supply and return fans are commanded ON, the return air
damper is driven to the full-closed position and the outdoor air and exhaust air
dampers are driven to their full-open positions. This allows maximum outdoor
air to be delivered to the nonsmoke zones. It also allows maximum exhausted
air to be expelled from the zone reporting the smoke condition.
2. The dedicated exhaust air dampers for Zones 1, 2, 3, 5, 7, 9, 10, and 11 (zones
contiguous to the smoke zone) are driven to the full-closed position while the
exhaust air damper for Zone 6 (smoke zone) is driven to the full-open position.
Optionally, the dedicated exhaust air dampers for the noncontiguous
smoke-control zones may also be driven to the full-closed position.
3. The terminal box supply air damper and its associated dedicated supply
damper for Zone 6 are driven to the full-closed position. This causes the smoke
zone to become negatively pressurized.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open.
Sufficient differential pressure must be achieved to ensure smoke spread is
confined to the zone in which the fire originated. In all cases, exhaust and supply
air dampers should continue to be driven to their full-open and full-closed
positions.
4. The terminal box supply air dampers and their associated dedicated supply
dampers for Zones 1, 2, 3, 5, 7, 9, 10, and 11 (zones contiguous to the smoke
zone) modulate open. The CFM flow supplied to these zones causes them to
be positively pressurized. The terminal box supply dampers continue to
modulate open until they reach the full-open position. Optionally, the terminal
box supply air dampers for the noncontiguous smoke-control zones may also
modulate open until their respective zones are positively pressurized.
86.NFPA 92A, 2009 ed., annex A, para. A.5.5.1.1.1.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
50
Page 67
Campus Smoke Control
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open.
Sufficient differential pressure must be achieved to ensure smoke spread is
confined to the zone in which the fire originated. In all cases, exhaust and supply
air dampers should continue to be driven to their full-open and full-closed
positions.
5. The automatic smoke-control sequence takes priority over the normal HVAC
control sequences and any HVAC control overrides. Static pressure high limits
and duct smoke detectors on supply air systems should not be automatically
overridden.
6. Once the automatic activation has occurred, subsequent alarm signals that
would normally initiate an automatic smoke-control sequence will annunciate
only. (For example if, in addition to the Zone 6 smoke/fire detector, the Zone 10
detector also trips, no change to the smoke-control sequence occurs and the
Zone 10 smoke condition also annunciates at the FSCS.)
87
7. At any time, the FSCS is capable of overriding either partially, or in full, any
automatic activation of a smoke-control sequence that may be in process.
88
8. The communications between all of the I/A Series BACnet controllers that are
part of the smoke-control sequences must be monitored. If the
communications between any of these controllers fails at any time, the system
trouble LED at the FSCS must illuminate and an audible signal must be
generated.
89
9. If any of the smoke-control equipment proof sensors fail to operate within a
specified period of time during the smoke-control sequence or when under
control of the FSCS, the system trouble LED at the FSCS illuminates and an
audible signal is generated. If the failed smoke-control equipment is dedicated,
its associated trouble LED also illuminates.
Alternately, if the smoke/fire detector for Zone 10 trips first, the automatic
smoke-control sequence is initiated in the following manner.
1. The central AHU supply and return fans are commanded ON, the return air
damper is driven to the full-closed position and the outdoor air and exhaust air
dampers are driven to their full-open positions. This allows maximum outdoor
air to be delivered to the nonsmoke zones. It also allows maximum exhausted
air to be expelled from the zone reporting the smoke condition.
2. The dedicated exhaust air dampers for Zones 5, 6, 7, 9, and 11 (zones
contiguous to the smoke zone) are driven to the full-closed position while the
exhaust air damper for Zone 10 (smoke zone) is driven to the full-open
position. Optionally, the dedicated exhaust air dampers for the noncontiguous
smoke-control zones may also be driven to the full-closed position.
87.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.2 and 6.4.5.2.1.2.
88.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
89.UUnderwriters Laboratories Inc., UL 864, Control Units and Accessories for Fire Alarm
Systems, 9th ed. (2003), para’s 48.5, 49.4, 49.6, and 49.7.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 51
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Chapter 4
3. The terminal box supply air damper and its associated dedicated supply
damper for Zone 10 are driven to the full-closed position. This causes the
smoke zone to become negatively pressurized.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open.
Sufficient differential pressure must be achieved to ensure smoke spread is
confined to the zone in which the fire originated. In all cases, exhaust and supply
air dampers should continue to be driven to their full-open and full-closed
positions.
4. The terminal box supply air dampers and their associated dedicated supply
dampers for Zones 5, 6, 7, 9, and 11 (zones contiguous to the smoke zone)
modulate open. The CFM flow supplied to these zones causes them to be
positively pressurized. The terminal box supply dampers continue to modulate
open until they reach the full-open position. Optionally, the terminal box supply
air dampers for the noncontiguous smoke-control zones may also modulate
open until their respective zones are positively pressurized.
Note: The UL acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open.
Sufficient differential pressure must be achieved to ensure smoke spread is
confined to the zone in which the fire originated. In all cases, exhaust and supply
air dampers should continue to be driven to their full-open and full-closed
positions.
5. The automatic smoke-control sequence takes priority over the normal HVAC
control sequences and any HVAC control overrides. Static pressure high limits
and duct smoke detectors on supply air systems should not be automatically
overridden.
90
6. Once automatic activation has occurred, subsequent alarm signals that would
normally initiate an automatic smoke-control sequence will annunciate only.
(For example if, in addition to the Zone 10 smoke/fire detector, the Zone 7
detector also trips, no change to the smoke-control sequence occurs and the
Zone 7 smoke condition also annunciates at the FSCS.)
7. At any time, the FSCS is capable of overriding either partially, or in full, any
automatic activation of a smoke-control sequence that may be in process.
91
8. The communications between all of the I/A Series BACnet controllers that are
part of the smoke-control sequences must be monitored. If the
communications between any of these controllers fails at any time, the system
trouble LED at the FSCS must illuminate and an audible signal must be
generated.
90.NFPA 92A, 2009 ed., chap. 6, para’s 6.4.2 and 6.4.5.2.1.2.
91.NFPA 92A, 2009 ed., chap. 6, para 6.4.3.7.11.
92.UL 864, 9th ed., para’s 48.5, 49.4, 49.6, and 49.7.
92
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
52
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Campus Smoke Control
9. If any of the smoke-control equipment proof sensors fail to operate within a
specified period of time during the smoke-control sequence or when under
control of the FSCS, the system trouble LED at the FSCS illuminates and an
audible signal generates. If the failed smoke-control equipment is dedicated,
its associated trouble LED also illuminates.
Smoke-Control System Configuration Schedule
Each smoke-control system configuration should be defined in a schedule.93 The
schedule should list all dedicated and nondedicated smoke-control equipment
and show the equipment response for each sensor that activates an automatic
smoke-control sequence. An example schedule for this application is shown
below (Table–4.1).
(Opn = Open, Clsd = Closed, “+” = Pos. Press., “-” = Neg. Press.
F.O. = Full Open, F.C. = Full Closed, Terminal Box = VAV Box)
Note:
• According to NFPA 92A, only the smoke zones that are contiguous to the
zone reporting the smoke condition have to be positively pressurized. For this
application, all non-smoke zones are being positively pressurized.
• Pressurization of the noncontiguous (optional) smoke-control zones is
dependent upon the smoke-control system design and its associated
specification. Regardless of whether or not noncontiguous smoke-control
zones are positively pressurized, sufficient differential pressure must be
achieved to ensure smoke spread is confined to the zone in which the fire
originated.
93.NFPA 92A, 2009 ed., chap. 6, para 6.4.5.3 and annex A, para A.6.4.5.3.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 53
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Chapter 4
Table–4.1 Schedule for Smoke-Control System Configuration .
Dedicated and
Nondedicated Smoke
Control Equipment
AHU Supply Fan ON ON ON ON ON ON ON ON ON ON ON ON
AHU Return Fan OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF
AHU O.A. Damper F.O. F.O. F.O. F.O. F.O. F.O. F.O. F.O. F.O. F.O. F.O. F.O.
AHU Return Damper F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C.
AHU Exhaust Damper F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C. F.C.
Zone 1 Exhaust Damper Opn Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd
Zone 1 Supply Damper Clsd Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn
Zone 1 VAV Box Supply Clsd Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn
Zone 1 -+++++++++++
Zone 2 Exhaust Damper Clsd Opn Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd
Zone 2 Supply Damper Opn Clsd Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn
Zone 2 VAV Box Supply Opn Clsd Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn
Zone 2 + - ++++++++++
Zone 3 Exhaust Damper Clsd Clsd Opn Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd
Zone 3 Supply Damper Opn Opn Clsd Opn Opn Opn Opn Opn Opn Opn Opn Opn
Zone 3 VAV Box Supply Opn Opn Clsd Opn Opn Opn Opn Opn Opn Opn Opn Opn
Zone 3 ++ - +++++++++
Zone 4 Exhaust Damper Clsd Clsd Clsd Opn Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd
Zone 4 Supply Damper Opn Opn Opn Clsd Opn Opn Opn Opn Opn Opn Opn Opn
Zone 4 VAV Box Supply Opn Opn Opn Clsd Opn Opn Opn Opn Opn Opn Opn Opn
Zone 4 +++ - ++++++++
Zone 5 Exhaust Damper Clsd Clsd Clsd Clsd Opn Clsd Clsd Clsd Clsd Clsd Clsd Clsd
Zone 5 Supply Damper Opn Opn Opn Opn Clsd Opn Opn Opn Opn Opn Opn Opn
Zone 5 VAV Box Supply Opn Opn Opn Opn Clsd Opn Opn Opn Opn Opn Opn Opn
Zone 5 ++++ - +++++++
Zone 6 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Opn Clsd Clsd Clsd Clsd Clsd Clsd
Zone 6 Supply Damper Opn Opn Opn Opn Opn Clsd Opn Opn Opn Opn Opn Opn
Zone 6 VAV Box Supply Opn Opn Opn Opn Opn Clsd Opn Opn Opn Opn Opn Opn
Zone 6 +++++ - ++++++
Zone 7 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Clsd Opn Clsd Clsd Clsd Clsd Clsd
Zone 7 Supply Damper Opn Opn Opn Opn Opn Opn Clsd Opn Opn Opn Opn Opn
Zone 7 VAV Box Supply Opn Opn Opn Opn Opn Opn Clsd Opn Opn Opn Opn Opn
Zone 7 ++++++ - +++++
Zone 8 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Clsd Clsd Opn Clsd Clsd Clsd Clsd
Zone 8 Supply Damper Opn Opn Opn Opn Opn Opn Opn Clsd Opn Opn Opn Opn
Zone 8 VAV Box Supply Opn Opn Opn Opn Opn Opn Opn Clsd Opn Opn Opn Opn
Zone 8 +++++++ - ++++
Zone 9 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Opn Clsd Clsd Clsd
Zone 9 Supply Damper Opn Opn Opn Opn Opn Opn Opn Opn Clsd Opn Opn Opn
Zone 9 VAV Box Supply Opn Opn Opn Opn Opn Opn Opn Opn Clsd Opn Opn Opn
Zone 9 ++++++++ - +++
Zone 10 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Opn Clsd Clsd
Zone 10 Supply Damper Opn Opn Opn Opn Opn Opn Opn Opn Opn Clsd Opn Opn
Zone 10 VAV Box Supply Opn Opn Opn Opn Opn Opn Opn Opn Opn Clsd Opn Opn
Zone 10 +++++++++ - ++
Zone 11 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Opn Clsd
Zone 11 Supply Damper Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Clsd Opn
Zone 11 VAV Box Supply Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Clsd Opn
Zone 11 ++++++++++- +
Zone 12 Exhaust Damper Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Clsd Opn
Zone 12 Supply Damper Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Clsd
Zone 12 VAV Box Supply Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Opn Clsd
Zone 12 +++++++++++ -
123456789101112
Smoke Detector Zones In Alarm
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
54
Page 71
Firefighter’s Smoke Control Station (FSCS)
The requirements of the FSCS are similar to the ones shown in Chapter 2. The
graphic depiction and smoke-control equipment used changes based on the
sequence of operation for this application.
System Topologies
Campus Smoke Control
Campus Topology with MNB-1000 Controllers
The MNB-1000 (Instance 100) controller provides the central AHU control,
monitors end process verification devices, distributes and receives global
information between controllers in the network, monitors communications to all of
the controllers beneath it, and initiates smoke-control sequences based on
information received from the appropriate controllers (Figure–4.1). Its MS/TP
communication trunk connects to the MNB-Vx controllers that provide HVAC
control of the occupied spaces. These MNB-Vx controllers also control the
dedicated supply and exhaust air smoke dampers to each smoke-control zone;
and monitor the proof-of-position switches for the dedicated dampers.
The MNB-1000 (Instance 150) controller provides a complete interface to the
FSCS through its EIA-485 (RS-485) ADI ModBus interface. It is mounted inside
the FSCS, along with its power supply. This controller functions as the master of
the smoke-control network in the building where it is installed. It monitors
communications to all of the controllers that are part of the smoke-control system,
distributes and receives global information between controllers in the network,
and initiates smoke-control sequences based on information received from the
appropriate controllers. Additionally, it’s UI and DI points interface to the N.O.
contacts of the UOJZ Fire Alarm Panel to monitor each zone’s smoke or fire
detector.
Note:
• In this example application, all seven buildings have the same basic controller
requirements and topology. Therefore, the explanations describe only one
building (Building 1) as a representative example.
• To simplify the application, only a minimal number of controllers are shown for
each building. The actual number required depends on the actual size and
programming complexity of the job.
Ethernet/IP Infrastructure
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 55
Any UL 864 Listed IP infrastructure devices can be used to create the network
topology. Currently, the only available units are the EIS8-100T and EIS6-100T/FT
switching hubs from Contemporary Controls. The path through the Ethernet/IP
network from any one UUKL device to another must use only UL 864 Listed
infrastructure devices. The Ethernet/IP Smoke-Control System can coexist with
the non-UL 864 networks, as long as they are isolated from those networks
through the use of UL 864 Listed IP infrastructure devices. Refer to Chapter 5,
Restrictions and General Comments, for additional information. In this example
(Figure–4.1 and Figure–4.2), the fiber optic feature of the EIS6-100T/FT switching
Page 72
Chapter 4
hubs is used to connect the individual buildings, thus creating a fiber backbone.
Once inside a building, the smoke-control system’s infrastructure is expanded
through the use of EIS8-100T switching hubs.
Note: At no time can any smoke control signals be passed over the public
Internet.
Wiring Requirements
Because the I/O wiring between the I/A Series BACnet controllers and the FSCS
(when an I/O wiring interface is used) and the UOJZ Fire Alarm Panel is
unsupervised, the I/A Series BACnet controllers used for this purpose must be
mounted within 20 ft of the panel to which they are connected. The I/O wiring must
be run in conduit. Table–4.2, below, lists the general requirements for the wiring
associated with an I/A Series BACnet smoke-control application.
Table–4.2 Wiring Requirements.
Wiring Status
Ethernet/IP Supervised by block programming
Supervised by block programming. When
MNB-1000 is mounted external to the
EIA-485 ADI ModBus
MS/TP Bus Supervised by block programming
I/O to FSCS
I/O to UOJZ FAP Contacts
Remaining I/O Unsupervised
FSCS, wiring must be run in conduit and
controller must be located within 20 ft. of
the panel.
Unsupervised, wiring must be run in
conduit and controllers must be located
within 20 ft. of the panel.
Unsupervised, wiring must be run in
conduit and controllers must be located
within 20 ft. of the panel.
Central System Interface and Overlay Devices
When a UNC, Web Server, and/or other central-system type interfaces are
attached to the Ethernet/IP network with the ability to access the smoke-control
system, they must be isolated from the network through the use of UL 864 Listed
IP infrastructure devices (Figure–4.2). This isolation is required by UL because
these devices, PC’s and/or interfaces, are not UL 864 Listed. Therefore these
devices cannot be used for smoke-control purposes.
Refer to Chapter 5, Restrictions and General Comments, for additional
information.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
56
Page 73
Campus Smoke Control
Figure–4.1 Campus Topology with MNB-1000 Controllers.
To MNB-1000 on FSCS
and additional UUKL
MNB-1000
Instance=400
To MNB-1000 on FSCS
and additional UUKL
MNB-1000
Instance=300
To MNB-1000 on FSCS
and additional UUKL
MNB-1000
Instance=200
controllers
EOL
JPR
MS/TP Bus
(EIA-485)
controllers
EOL
JPR
MS/TP Bus
(EIA-485)
controllers
EOL
JPR
MS/TP Bus
(EIA-485)
EIS6-100T/FT
Switching Hub
EIS6-100T/FT
Switching Hub
EIS6-100T/FT
Switching Hub
Building 4 - Administration
To remainder of building's IT
network that is not UUKL
FSCS
FAP
Building 3
To remainder
of building's IT
network that is
not UUKL
FSCS
and
FAP
Building 2
To remainder
of building's IT
network that is
not UUKL
FSCS
and
FAP
1
1
1
Building 5
To remainder
of building's IT
network that is
not UUKL
FSCS
and
FAP
Building 6
To remainder
of building's IT
network that is
not UUKL
FSCS
and
FAP
EOL JPR End-of-line resistor and/or bias resistors
and
are engaged through on-board jumpers
Note: Only specific UL wiring and installation
requirements are shown. For complete
installation and wiring requirements,
refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices
Guide, F-27360, and other appropriate
documentation listed in Appendix C.
To MNB-1000 on FSCS
and additional UUKL
controllers
EOL
JPR
EIS6-100T/FT
Switching Hub
EIS6-100T/FT
Switching Hub
MS/TP Bus
(EIA-485)
To MNB-1000 on FSCS
and additional UUKL
controllers
EOL
JPR
MS/TP Bus
(EIA-485)
Key
MNB-1000
Instance=500
MNB-1000
Instance=600
To MNB-1000 on FSCS
and additional UUKL
MNB-1000
Instance=100
controllers
EOL
JPR
MS/TP Bus
(EIA-485)
EIS6-100T/FT
Switching Hub
Building 1
To remainder
of building's IT
network that is
not UUKL
FSCS
and
FAP
Building 7
To remainder
of building's IT
network that is
not UUKL
1
FSCS
and
FAP
1 In the example shown here, the communications
connections between buildings use fiber optic cabling,
for lightning protection.
To MNB-1000 on FSCS
and additional UUKL
EIS6-100T/FT
Switching Hub
controllers
EOL
JPR
MS/TP Bus
(EIA-485)
MNB-1000
Instance=700
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 57
Page 74
Chapter 4
Note: All references to the MNB-V1 equally apply to
the MNB-V1-2 and all references to the MNB-V2
equally apply to the MNB-V2-2.
Ethernet/IP
Ethernet/IP
Ethernet/IP
Web Access-1
(Internet Explorer)
Web Access-2
(Internet Explorer)
To remainder of
building's IT
network that is
not UUKL
To Any additional
controllers that are
part of the UUKL
control system
UNC-1
(UNC-520-2)
Instance=5000
EIS8-100T
Switching Hub
EIS6-100T/FT
Switching Hub
2
1
1
3
3
3
4
I/O
MNB-1000
Instance=100
MS/TP Addr=0
To Building 1 AHU
control and end
process verification
devices
4
5
6
EOL
JPR
EOL
JPR
MNB-1000
Instance=150
To FSCS
4
5
6
2
3
4
1 At no time can any smoke control signals be passed over
the public Internet.
2 The UL 864 Ethernet switches shown must be installed in
UL 50 enclosures.
3 The UL 864 Listed Ethernet switches can be used to
provide isolation of non-UUKL devices from the UUKL
Ethernet network. Refer to Chapter 5, "Restrictions and
General Comments," for additional information regarding
the use of Ethernet/IP networks and approved devices.
4 The path through the Ethernet/IP network from any one
UUKL device to another must only use UL 864 Listed
Ethernet/IP infrastructure devices.
5 All UUKL controllers must be mounted in approved
enclosures. Refer to Chapter 5, "Restrictions and
General Comments," for additional information.
6 See "Wiring Requirements" in this chapter.
7 The ADI ModBus interface to the ADI FSCS uses the
Remote I/O Bus of the MNB-1000, not the MSTP Bus.
8 Remote I/O Bus wiring must adhere to the installation
requirements defined in Chapter 5, "Restrictions and
General Comments"
To MNB-V2
Instance=101
NW #1
To next building
From previous building
Fiber Optic Trunks
Remote I/O Bus
(EIA-485, ADI ModBus)
7
8
Key
EOL JPR End-of-line resistor and/or bias resistors
are engaged through on-board jumpers.
Remote I/O Inputs and outputs remotely provided by
the ADI ModBus interface. The Remote
I/O Port refers to the top EIA-485 port
on the MNB-1000.
I/O Discrete input and output wiring to or
from controlled or monitored devices.
NW Network
Remote I/O
Port (ADI)
Figure–4.2 Ethernet/IP Network Topology—Typical of Each Building.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
58
Page 75
Campus Smoke Control
MNB-V2 Topology
Each building has a central AHU that serves the entire building and is controlled
by an MNB-1000. Each room has an MNB-V2 that controls the VAV terminal box
(Figure–4.3). During normal occupied conditions, each MNB-V2 modulates its
primary damper and the hot water reheat, as required, to maintain its zone
temperature setpoint. During the unoccupied mode, each terminal box either
maintains its respective unoccupied zone temperature setpoint or is driven to a
fixed position. Each room on a floor is considered a smoke-control zone. By
controlling the VAV box, the MNB-V2 controls the supply air to each zone. A
dedicated exhaust damper is required for each smoke-control zone and is
controlled by a spare DO point from the MNB-V2 serving its zone. The dedicated
exhaust dampers are always in the full-open position unless commanded
otherwise due to a smoke-control condition.
In this example, each smoke-control zone shows a dedicated supply damper that
is controlled by another spare DO point from the same MNB-V2. The dedicated
supply dampers remain in the full-open position at all times, unless commanded
otherwise as a result of a smoke-control related condition. This building layout is
typical for all the buildings on the campus.
Note: UL’s acceptance of the MNB-V1 and MNB-V2 controllers for UUKL is
based on the assumption that negative pressurization of a smoke zone is
considered accomplished when the total CFM flow supplied to the zone drops
below 50% of its maximum with its dedicated exhaust damper fully open. If the
damper’s response time is acceptable (less than 75 seconds) under this
condition, and proper pressurization is achieved, dedicated supply air dampers
are not necessary solely to meet response time requirements. In all cases,
exhaust and supply air dampers should continue to be driven to their full-open and
full-closed positions. The smoke-control system’s design and its associated
specification will dictate whether additional requirements apply to the supply air
dampers.
Damper end switches are used to verify the end stroke of all dedicated supply and
exhaust motor-driven dampers. All end process verification of the dedicated zone
dampers is monitored by UI points on the MNB-V2 controller associated with each
zone.
MS/TP Bus Requirements
A repeater is required for the MS/TP bus whenever there is a need to extend the
maximum distance of the bus or increase the number of devices that can be
connected to the bus. The B-LINK-AC repeater can be used for this purpose.
Refer to Chapter 5, Restrictions and General Comments for additional repeater
information.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 59
Page 76
Chapter 4
1st
Floor
2nd
Floor
3rd
Floor
Building Air Handling Unit
Exhaust Air
Damper
Outside Air
Damper
Supply FanReturn Fan
Return Air Damper
Zone 7
Supply Air
Damper
MNB-V2
Zone 6
Supply Air
Damper
MNB-V2
Zone 5
Supply Air
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
Exhaust
Damper
MNB-V2
Zone 8
Supply Air
Damper
MNB-V2
Zone 11
Supply Air
Damper
MNB-V2
Zone 10
Supply Air
Damper
MNB-V2
Zone 9
Supply Air
Damper
MNB-V2
Zone 12
Supply Air
Damper
MNB-V2
Zone 3
Supply Air
Damper
MNB-V2
Zone 2
Supply Air
Damper
MNB-V2
Zone 1
Supply Air
Damper
MNB-V2
Zone 4
Supply Air
Damper
MNB-V2
MNB-1000
Note: All references to the MNB-V1 equally apply to the MNB-V1-2 and all
references to the MNB-V2 equally apply to the MNB-V2-2.
Figure–4.3 Typical Building Topology.
60
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
Page 77
Campus Smoke Control
MNB-1000 Interface to FSCS
In a multi-building application such as this, a separate FSCS is typically
required for each protected premises or building. The following description is
typical of each building, with the only difference being the controller instance
numbers.
The MNB-1000 (Instance 150) controller (Building 1) provides a complete
interface to the FSCS through its EIA-485 (RS-485) ADI ModBus interface
(Figure–4.4). It controls all of the FSCS LEDs and monitors all of the FSCS
override switches. The FSCS (panel) Enable switch functionality is also
enforced through programming in the MNB-1000 controller. Refer to Chapter
5, Restrictions and General Comments for for an example of this
programming and for additional information on the FSCS interface.
When interfaced to the ADI FSCS, the MNB-1000 controller and its power
supply are mounted inside the FSCS enclosure, eliminating the need for
separate enclosures. This controller functions as the master of the
smoke-control network for the building where it is installed. One master
exists in each building. It monitors communications to all of the controllers
that are part of the smoke-control system, distributes and receives global
information between controllers in the network, initiates smoke-control
sequences based on information received from the appropriate controllers,
and integrates the FSCS functionality into the system.
Note: When using I/O points to interface to a UL 864 UUKL/UUKL7 Listed
FSCS in place of using an ADI FSCS that supports the ADI ModBus
protocol, many additional controllers will be required. Each installation must
be carefully assessed to ensure that adequate quantities of devices have
been allotted to perform the necessary control and monitoring functions.
Refer to "Job Estimating" on page 78 for point calculating specifics.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 61
Page 78
Chapter 4
EOL
To MNB-1000
(Instance=100)
Key
EOL End-of-line resistor, 120 Ω (part
number EMSC-546)
*
See "MS/TP Requirements" in
this chapter.
Smoke Control Zone 9Smoke Control Zone 10Smoke Control Zone 11Smoke Control Zone 12
MNB-V2
Instance=1012
MS/TP Addr=12
MNB-V2
Instance=1011
MS/TP Addr=11
MNB-V2
Instance=1010
MS/TP Addr=10
MNB-V2
Instance=109
MS/TP Addr=9
Smoke Control Zone 5Smoke Control Zone 6Smoke Control Zone 7Smoke Control Zone 8
MNB-V2
Instance=108
MS/TP Addr=8
MNB-V2
Instance=107
MS/TP Addr=7
MNB-V2
Instance=106
MS/TP Addr=6
MNB-V2
Instance=105
MS/TP Addr=5
Smoke Control Zone 1Smoke Control Zone 2Smoke Control Zone 3Smoke Control Zone 4
MNB-V2
Instance=104
MS/TP Addr=4
MNB-V2
Instance=103
MS/TP Addr=3
MNB-V2
Instance=102
MS/TP Addr=2
MNB-V2
Instance=101
MS/TP Addr=1
Floor 1
Floor 2
Floor 3
MS/TP Bus
*
Note: Only specific UL wiring and installation requirements
are shown. For complete installation and wiring
requirements, refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide, F-27360, and
other appropriate documentation listed in Appendix C.
Note: All references to the MNB-V1 equally apply to the
MNB-V1-2 and all references to the MNB-V2 equally
apply to the MNB-V2-2.
Figure–4.4 MNB-V2 Controller Topology—Typical of Each Building.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
62
Page 79
Campus Smoke Control
Fire Alarm Panel Interface
In this application, a separate Fire Alarm Panel (FAP) is located in each
building. Alternatively, a single FAP panel that handles all of the remote
buildings may be located in a central building, instead. The manner in which
the FAPs are applied is dependent upon the UL Listing and NFPA 72 codes
for which the panels are approved. Check with the FAP manufacturer to
determine which listings and approvals apply to specific models. For
additional information, refer to the applicable UL and NFPA codes. The
following description is typical of each building.
In Building 1, the UOJZ Listed N.O. contacts from the Fire Alarm Panel are
wired directly to contact inputs of the FSCS MNB-1000 (Figure–4.5). When
this option is used, the FSCS and the FAP device supplying the contacts
must be mounted within 20 ft. of each other, and the I/O wiring must be run
in conduit because the I/O wiring is unsupervised.
When the FAP is interfaced to the FSCS MNB-1000 in this manner, the
statuses of the smoke alarms are received by the MNB-1000 (Instance 150)
controller through its I/O points and distributed throughout the network, as
required, to support the smoke-control sequence.
Note: When using controller I/O points to interface to UOJZ Listed N.O.
contacts from a Fire Alarm Panel, several additional controllers will be
required. Each installation must be carefully assessed to ensure that
adequate quantities of devices have been allotted to perform the necessary
control and monitoring functions. Refer to "Job Estimating" on page 78 for
point calculating specifics.
Comments
Always refer to the NFPA 92A, NFPA 72, and UL 864 UUKL/UUKL7
standards for additional Smoke-Control Systems information. Additionally,
general system application comments and restrictions are provided in
Chapter 5, Restrictions and General Comments. This chapter should be
thoroughly reviewed to ensure compliance with the UL listing. It is the
responsibility of the field office to work with the smoke-control system
designer and gain the smoke-control system approval from the Authority
Having Jurisdiction (AHJ).
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 63
Page 80
2
UOJZ Listed
Fire Alarm Panel
SD
SD
SD
SD
SD
SD
Zone 1 Smoke Alarm
Zone 2 Smoke Alarm
Zone 3 Smoke Alarm
Zone 4 Smoke Alarm
Zone 5 Smoke Alarm
Zone 6 Smoke Alarm
SD
SD
SD
SD
SD
SD
Zone 7 Smoke Alarm
Zone 8 Smoke Alarm
Zone 9 Smoke Alarm
Zone 10 Smoke Alarm
Zone 11 Smoke Alarm
Zone 12 Smoke Alarm
Note: Only specific UL wiring and installation requirements
are shown. For complete installation and wiring
requirements, refer to the I/A Series MicroNet BACnet
Wiring and Networking Practices Guide, F-27360, and
other appropriate documentation listed in Appendix C.
Key
EOL JPRa End-of-line resistor is engaged through an on-board
jumper on the MNB-1000. Refer to the MicroNet
BACnet MNB-1000 Plant Controller Installation
Instructions, F-27347, for additional information.
EOL JPRb End-of-line resistor is engaged through an on-board
jumper on the FSCS. Refer to the documentation
shipped with the unit.
Remote I/O Inputs and outputs remotely provided by the ADI
ModBus interface. The Remote I/O Port refers to the
top EIA-485 port on the MNB-1000.
I/O Discrete input and output wiring to or from controlled
or monitored devices.
1 In this example, the MNB-1000 controller shown is
mounted inside the ADI FSCS enclosure, along with its
dedicated power supply. This is an option that can be
specified when ordering the ADI FSCS. Refer to Chapter
5, "Restrictions and General Comments," for additional
information regarding the FSCS.
2 The UOJZ Listed N.O. contacts from the Fire Alarm
Panel (FAP) are wired directly to contact inputs of the
FSCS MNB-1000 controller. When this option is used,
the FSCS and the FAP device with the contacts must be
mounted within 20 ft. of each other, and the I/O wiring
must be run in conduit because the I/O wiring is
unsupervised.
3 All UUKL controllers must be mounted inside approved
enclosures. Refer to Chapter 5, "Restrictions and
General Comments" for additional information. When the
ADI FSCS is ordered with the MNB-1000 and its power
supply mounted internally, no additional enclosures are
required.
4 The path through the Ethernet/IP network from any one
UUKL device to another must only use UL 864 Listed
Ethernet/IP infrastructure devices.
5 If individual controllers use hard-wired I/O points to
interface to the FSCS, these controllers must be
mounted within 20 ft. of the FAP, and the I/O wiring must
be run in conduit because the I/O wiring is unsupervised.
6 The ADI ModBus interface to the ADI FSCS uses the
Remote I/O Bus of the MNB-1000, not the MSTP Bus.
7 Remote I/O Bus wiring must adhere to the installation
requirements defined in Chapter 5, "Restrictions and
General Comments".
EOL
JPRb
Remote I/O Bus
(EIA-485, ADI ModBus)
EOL
JPRa
1
3
5
6
7
4
To available port
on UL 864 Listed
Ethernet/IP
Switching Hub
I/O
I/O
1st
Floor
2nd
Floor
3rd
Floor
Exhaust Air
Damper
Outside Air
Damper
Supply FanReturn Fan
Return Air Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Exhaust Air
Damper
Supply Air
Damper
Smoke Control Panel
Zone 5Zone 6Zone 7Zone 8
Zone 1Zone 2Zone 3Zone 4
Zone 9
Zone 10Zone 11Zone 12
Remote I/O
Port (ADI)
MNB-1000
Instance=150
Figure–4.5 FSCS Interface—UOJZ Fire Alarm Panel Interface and Related MNB-1000 Controller.
Chapter 4
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Chapter 5
Restrictions and General Comments
Purpose
This chapter lists restrictions associated with the application of I/A Series
MicroNet BACnet controllers to UL 864 UUKL/UUKL7 smoke-control
systems. These restrictions take precedence over existing I/A Series
BACnet literature and are required to meet the UL 864 UUKL/UUKL7
Listing. This chapter also includes general comments that may provide
additional insight or flexibility during the engineering process.
Restrictions
Software Access Levels
There are three primary tools used with I/A Series MicroNet BACnet
controllers: Flow Balance Tool, Commissioning Tool, and WorkPlace Tech
Tool (WP Tech).
Flow Balance Tool and Commissioning Tool
The Flow Balance Tool and Commissioning Tool use their own, built-in,
dual-level security configuration. Whenever either of these tools is used on a
UUKL job site, the security must be configured and enabled. The two
access levels are:
Manager Level: Anyone with manager-level access is considered to be at
the “programmer” level and not a “day-to-day operator”.
User Level: Anyone with user-level access is considered to be a
“day-to-day operator”. Typical changes made by the “day-to-day operator”
will not affect the smoke-control sequence.
For each access level, a password of at least five characters must be
assigned, "Auto-lock" must be enabled, and the "Auto-lock" time period must
be set at 30 minutes or less. The "Auto-lock" time period defines the period
of inactivity that must pass before the tool locks access to the program.
When the program is locked in this way, the user or manager must log back
into the system before operation can resume.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 65
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Chapter 5
WorkPlace Tech Tool
When using or leaving WP Tech at a UUKL job site, its security feature must be
configured and enabled through the Commissioning Tool. When using the security
feature with WP Tech, the following apply:
• The “Auto-lock” feature is not available.
• Only the manager level of access is valid. Users are not allowed to start
WP Tech.
• The “Auto-lock” feature associated with the manager level must be configured
and handled by the Windows
When running WP Tech at the job site, a dedicated Windows
be used. To define the password protection and “Auto-lock” aspects of each user
account, right-click the Windows desktop, and then use the Screen Saver tab of
the Windows Desktop Properties dialog box. Each account used for this purpose
must have a password of at least five characters, have "Auto-lock" enabled, and
have an "Auto-lock" time period of 30 minutes or less. These accounts must not
be used for any other purpose.
®
account used by the individual.
user account must
System Overrides
Overrides that Require Removal
If a person with manager-level (programmer-level) access overrides any values or
functions in the I/A Series BACnet controllers, in a manner that impedes the
automatic smoke-control functions or interferes with the FSCS’s absolutely
highest priority control over the system, then the overrides must be removed
before the system is returned to normal operation. This rule always applies,
whether the purpose of the override is for troubleshooting, service, programming,
or temporary control.
Overrides that Do Not Require Removal
Overrides do not need to be removed before the system is returned to normal
operation if they are initiated in a manner that does not impact the automatic
smoke-control functions or the ability of the FSCS to have absolutely highest
priority control over the system. Such overrides can be considered exceptions to
the restriction described above, in Overrides that Require Removal.
This exception is only applicable if all automatic smoke-control functions are
commanded through the BACnet priority level of “Automatic Life Safety (2)”, and
all FSCS commands are commanded through the BACnet priority level of “Manual
Life Safety (1)”.
Examples of these types of overrides include those initiated by any BACnet
device or tool, at a priority below the “Automatic Life Safety” level.
Input Priority Levels: In a BACnet input name, the numeral in brackets signifies
the level of priority. For example, the input name
that the input, “Manual Life Safety,” has the highest BACnet priority level.
“Automatic Life Safety (2)” means that this input has the second-highest priority
level, and so forth.
Manual Life Safety (1)” means
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Restrictions and General Comments
Approved Fire Alarm Panels
Approved Firefighter’s Smoke Control Stations
Any UOJZ listed fire alarm panel with programmable N.O. relay contacts can be
used with I/A Series BACnet controllers. The fire alarm panel (i.e. listed Fire Alarm
Control Unit) is the primary indicator for smoke and fire alarm conditions. These
panels are listed for the UOJZ category of the UL 864 standard. The dry contact
outputs from the UOJZ listed fire alarm panel can be wired directly to the
appropriate inputs of the I/A Series MicroNet BACnet controllers, or to inputs
provided on the UUKL listed Firefighter’s Smoke Control Station (FSCS).
Any UUKL listed Firefighter’s Smoke Control Station (FSCS) can be used with
I/A Series BACnet controllers. The FSCS (i.e. listed Smoke Control Panel) is the
primary indicator for the status of all smoke control and related HVAC equipment.
The FSCS also provides the interface for manual activation commands and
overrides for all smoke control and related HVAC equipment. The FSCS is listed
for the UUKL category of the UL 864 standard.
The Automation Displays, Inc. (ADI) series of graphic smoke-control panels are
UUKL listed and can be used for smoke-control applications. They can be
equipped with terminals that allow wiring to discrete I/O points, an ADI ModBus
EIA-485 (RS-485) interface for controllers that support the ADI ModBus interface,
or a hybrid of the two. If the ADI ModBus EIA-485 version is used with an
MNB-1000 controller (which supports the ADI ModBus interface), the combination
can take advantage of reduced I/O count requirements, reduced engineering and
installation time, and use of the WP Tech ADI Wizard to expedite the process of
FSCS and BACnet point creation in the application database.
Note: WP Tech ADI Wizard
The ADI Wizard, used in concert with the LED/Switch definition file (generated
during the FSCS specification/ordering phase), provides the following productivity
advantages:
• Automatic creation of all LED and Switch objects.
• Automatic naming of all ADI point objects, in accordance with specification
requirements.
• Automatic configuration of the LED and Switch (ADI ModBus) bank and
register data.
• Configuration of all ADI ModBus communication-related parameters.
• Global and individual changes to the Switch output format (ON-OFF or
ON-NA).
• Global and individual changes to Switch-enabled statuses for interlocking to
the FSCS Enable switch.
• Drag-and-drop functionality on any page of a WP Tech application drawing.
• Unique BACnet objects are automatically created for all ADI objects.
When using an ADI FSCS, the I/A Series BACnet Controllers and their
transformers can be mounted either inside or outside the FSCS. If the controllers
and transformers are mounted internally, they can be supplied to the FSCS
vendor for pre-installation and wiring. If the controllers and transformers are to be
mounted externally, they must comply with the installation requirements detailed
throughout this manual and in the documentation listed in Appendix C.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 67
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Chapter 5
When ordering an ADI FSCS, it is necessary, as a minimum, to provide the vendor
with the information listed below. Note that this list is provided only as a guide for
organizing the process. The actual requirements must be worked out with the
vendor.
• A detailed drawing of the graphic required.
• Switch quantities, types, locations, and related label text (if any).
• LED quantities, locations, colors, and related label text (if any).
• A spreadsheet listing the name (20 characters or less) of each LED and
switch position point, and their related descriptions. Note that this information
is also used by the ADI Wizard to expedite the point creation process in
WP Tech.
• Panel size and any other requirements affecting the FSCS’s physical
construction.
• Supporting dimensions and wiring diagrams associated with any controllers
and transformers that will be mounted inside the FSCS.
• Whether the FSCS is to be supplied with terminals for wiring to discrete I/O
points, an ADI ModBus EIA-485 interface for controllers that support the ADI
ModBus interface, or a hybrid of the two.
When applying the ADI FSCS to the I/A Series BACnet Smoke-Control System,
certain programming must be implemented by the control applications to meet the
requirements of UL 864 UUKL/UUKL7. Examples of this programming are shown
in Figure–5.1 and Figure–5.2.
Figure–5.1 shows a method for implementing support for the FSCS Enable
switch, required by UL 864 UUKL/UUKL7. When the switch is in the disabled
position, it disables all switch inputs to the FSCS and turns OFF the LED
associated with the FSCS Enable switch. As can be seen in the figure, the FSCS
Enable and Alarm Silence switch inputs are always enabled, indicated by the
green triangle present at the left side of their resource tags. This aspect of each
switch is established through the use of the ADI Wizard. The figure also shows an
example of the support required for the System Trouble Alarm Silence input from
the FSCS.
Figure–5.2 shows an example of a method for implementing support for the
System Trouble Annunciation (visual and audible), required by UL 864
UUKL/UUKL7. All individual smoke-control functions that must annunciate a
system trouble, as well as lost communications to any smoke-control device, are
logically “OR’d” together to generate a single System Trouble signal. This output
controls the System Trouble LED at the FSCS. Depending upon the type of FSCS
interface being used, this output can either go directly to the ADI ModBus
interface resource tags associated with the FSCS, or control a discrete DO point
tied to the FSCS. Refer to "Lost Communications" on page 80 for hardware and
FSCS requirements for controlling the System Trouble LED.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 85
Inputs from FSCS (Switches)
Outputs to FSCS (LEDs)
Figure–5.1 FSCS Enable, System Trouble Alarm Silence, and FSCS Communication Status
Restrictions and General Comments
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 69
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Chapter 5
Figure–5.2 Device Communication Status and System Trouble Annunciation
System Trouble Annunciation
Device Communication Status
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Restrictions and General Comments
Figure–5.3 IP/Ethernet UL 864 Listed Infrastructure Devices and Isolation.
Approved IP/Ethernet Infrastructure Devices
3
4
5
Ethernet/IP Ethernet/IP
2
8
3
4
5
Commissioning Tool
MNB-1000
2
RJ-45
Jack
To MS/TP Bus
(EIA-485)
UNC-1
RJ-45
Jack
3
5
Two IP/Ethernet switches have been identified as UL 864 Listed and can be
used with the I/A Series BACnet MicroNet Smoke-Control System when
constructing the IP/Ethernet infrastructure. These switches are shown in
Appendix B. The EIS8-100T provides eight 10/100 Mbps RJ-45 ports.
Enterprise Server,
WorkPlace Pro, Workbench
and/or Web Browser
To rest of Building
1
EIS8-100T
Switching Hub
6
WP Tech and/or
1 At no time can any smoke control signals be
2 When you follow the path from one UL 864
3 Non-UUKL (UL 864) IP/Ethernet devices can
4 All isolated devices that utilize a computer must
IT Network that is
not UUKL
3
4
5
24 Vac
Enterprise Server,
WorkPlace Pro, Workbench
and/or Web Browser
RJ-45
Jack
MNB-1000
To MS/TP Bus
(EIA-485)
passed over the public Internet.
UUKL device to any other UL 864
UUKL/UUKL7 device, the path must consist of
only UL 864 Listed devices.
be connected to the network, but must be
isolated from the network through the use of a
UL 864 Listed IP/Ethernet infrastructure device,
or through connection to a port on one of these
devices. Devices such as the UNC-5xx and/or
ENC-5xx, as well as PCs running WorkPlace
Tech, WorkPlace Tech Commissioning Tool,
Enterprise Server, WorkPlace Pro, Workbench,
Web browsers, etc. are examples of devices
that fall into this category.
be Information Technology Equipment (ITE) or
UL 60950 Listed, and should bear the
respective UL marking.
WorkPlace Pro, Workbench
To any additional EIS
Switches that have
controllers that are
2
Enterprise Server,
and/or Web Browser
part of the UUKL
control system
2
8
RJ-45
Jack
MNB-1000
To MS/TP Bus
(EIA-485)
5 Devices such as the UNC-5xx and/or ENC-5xx, as
well as PCs running WorkPlace Tech, WorkPlace
Tech Commissioning Tool, Enterprise Server,
WorkPlace Pro, Workbench, Web browsers, etc.
can only be used as “overlay” devices. They cannot
be used for smoke control purposes or, through
their use, interfere with the smoke control process.
6 Any of the appropriately sized transformers listed in
Appendix B can be used to power the EIS8-100T
and EIS6-100T/FT IP/Ethernet switches shown. For
additional installation instructions and cabling
requirements, refer to the EISwitch Installation
Guide associated with the product.
7 The fiber optic ports associated with the switches
can be used in the same manner as the wire ports
to support extension of the IP/Ethernet network, or
to provide isolation. Additionally, the fiber optic
ports can be used when it is necessary to run the
IP/Ethernet network between buildings, in
accordance with the “UL-1459 (Abnormal
Overvoltage) Compliance” section.
8 The IP/Ethernet infrastructure devices must be
mounted in approved UL enclosures. See the
“Enclosures” section for more details.
EIS6-100T/FT
Switching Hub
7
6
2
3
24 Vac
ENC-2
4
1
5
RJ-45
Jack
3
5
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 71
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Chapter 5
Approved MS/TP Repeaters
When selecting an MS/TP repeater for use in a UUKL smoke-control
system, be sure to consider the following:
• Generally speaking, a UL 864-approved MS/TP repeater can be used
on a UUKL smoke-control system’s MS/TP bus to either extend wire
distance, increase the number of devices allowed (when applicable), or
both.
• In most cases, the UL 864-approved MS/TP repeater will be used on a
UUKL smoke-control system to isolate the UUKL Listed controllers from
those that are not listed.
• When a repeater will be used with I/A Series BACnet MicroNet
controllers in a UUKL smoke-control application, it is recommended that
you choose an MS/TP repeater that has been specifically tested, as
listed in Appendix B.
• When using “b-Link” repeaters, certain installation guidelines must be
followed. Figure–5.4 shows an example using the B-LINK-AC-S
wire-only repeater. The same installation rules apply to the
B-LINK-AC-F-S fiber optic repeater for those items common to both.
Coexistence and Isolation of Non-UL 864 Devices on the MS/TP Bus
When connecting one or more non-UL 864 Listed BACnet devices to an
MS/TP bus that is involved in smoke control, a UL 864 Listed MS/TP
repeater must be used to isolate those BACnet devices from the rest of the
controllers. Figure–5.4 illustrates examples of this isolation. Optionally,
instead of using an MS/TP repeater for isolation, the non-UUKL devices can
be located together under other MNB-1000 controllers whose MS/TP bus
are not involved in smoke control.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
72
Page 89
Restrictions and General Comments
Figure–5.4 UL 864 Listed MS/TP Repeater and Isolation.
Non-UUKL
(Isolated)
2
4
EOL
Bias
MNB-1000
4
UUKL Smoke
Control
5
MS/TP Bus
(EIA-485)
MNB-1000
MS/TP Bus
(EIA-485)
115/230 Vac
1
MNB-300
3
MNB-300
MNB-V2
MNB-300
Non-UUKL
Device
MS/TP Bus
(EIA-485)
MNB-300
Non-UUKL
Device
MNB-V2
MNB-300
Non-UUKL
MNB-V2
EOL
Bias
4
MNB-300
5
EOL
Device
4
Note: All references to the MNB-V1 equally apply
to the MNB-V1-2 and all references to the
MNB-V2 equally apply to the MNB-V2-2.
EOL
4
1 The Input port of the repeater must have its MS/TP bus shield connected to the SHLD
terminal, which is isolated from Earth Ground. The incoming MS/TP shield must be
grounded at only one point, at a location other than the repeater. Typically this is at the
opposite end of the bus, or where the MNB-1000 parent controller resides.
2 All four of the repeater's Output ports have their SHLD terminals tied together, and tied to
Earth Ground internally, through the power supply's Earth Ground connection. For each
MS/TP bus cable leaving these ports, the single point of ground for the shield is at the
repeater and, therefore, the shield must not be grounded at any other point on the bus.
3 The AC power source for the repeater must provide a known, good, Earth Ground
connection to the Earth Ground terminal.
4 Anytime the MS/TP repeater is connected to a bus, the jumper-enabled end-of-line (EOL)
resistors associated with the MNB-1000 and MNB-300 controllers (on that bus) must be
disabled. The same EOL resistor requirements still apply, except that external discrete
terminators must be used. The 120 Ω termination resistor (part no. EMSC-546) has been
provided for this purpose. If the repeater is the end-of-line for each bus, then each port
should have the 120 Ω termination resistor installed between the “MSTP +” and “MSTP–“
terminals. Likewise, the last device at the other end of each bus must also have the 120 Ω
termination resistor installed between the “MSTP +” and “MSTP –“ terminals.
7
RS-232
+
–
5
SHLD
+
–
4
SHLD
+
–
3
SHLD
+
–
2
SHLD
+
–
1
SHLD (Input)
L
N
Line Voltage
115
Selector
RS-485
RD TD
RD TD
RD TD
RD TD
RD TD
RD TD
Andover Controls
B-LINK-AC
Baud Rate
300
1200
2400
9600
19200
38400
76800
Spare
Power
6
MS/TP Bus
(EIA-485)
MNB-300
Bias
5
Non-UUKL
MNB-V2
Device
Non-UUKL
MNB-V2
Device
MNB-V2
EOL
4
5 Bias resistors must still be
applied to each bus, as outlined
in the EIA-485 Termination and
Bias Resistors section.
6 The integral enclosure associated
with the “B-LINK-AC-S” repeater
meets the enclosure
requirements of UUKL.
7 The RS-232 connection cannot
be used in UL 864 smoke control
applications.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 73
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Chapter 5
Use of MNB-1000 IP Switch Feature
Dedicated Supply Air Dampers
IP switching, also known as port bridging, is enabled on the bottom Ethernet
IP port (RJ-45 connector) of the MNB-1000 controller. However, when an
MNB-1000 controller is applied to a UUKL smoke-control system, this IP
switch feature cannot be used. For this reason, in UUKL applications all
IP/Ethernet connections must be made to the top Ethernet IP port only. If
there is a need to increase the number of IP or Ethernet nodes, the IP
infrastructure devices noted earlier must be used. See "Approved
IP/Ethernet Infrastructure Devices" on page 71 and the list of devices in
Appendix B.
In many cases, a dedicated motor-driven damper may need to be installed in
the common supply air duct feeding each smoke-control zone. This damper
is required to provide smoke zones that are negatively pressurized with
respect to all contiguous smoke-control zones, within the response time
specified by NFPA 92A and UL 864 UUKL/UUKL7.
Note:
• UL’s acceptance of the MNB-V1 and MNB-V2 MicroNet VAV controllers
for UUKL is based on the assumption that negative pressurization of a
smoke zone is considered accomplished when the total flow rate (CFM)
supplied to the zone drops below 50% of its maximum while its
dedicated exhaust damper is fully open.
• UL’s acceptance of the MNB-V1 and MNB-V2 MicroNet VAV controllers
for UUKL is based on the assumption that positive pressurization of a
smoke-control zone is considered accomplished when the total flow rate
(CFM) supplied to the zone exceeds 50% of its maximum while its
dedicated exhaust damper is fully closed.
• In a smoke-control zone, exhaust and supply air dampers should always
be driven to their full-open and full-closed positions. Sufficient differential
pressure must be achieved between zones to ensure smoke spread is
confined to the zone in which the fire originated.
The MNB-V1 and MNB-V2 MicroNet VAV controllers have a 3.0 minute
travel time to achieve a 90° rotation when under continuous drive (forced
open or closed). Since these controllers have an adjustable travel range
from 45° to 90°, the worst case full-stroke travel time can vary from
approximately 1.5 to 3.0 minutes. NFPA 92A and UL 864 UUKL/UUKL7
specify that achieving positive and negative pressurization of the
smoke-control zones and smoke zones, respectively, must be accomplished
within 75 seconds. Therefore, the application must be evaluated to
determine if this time can be met without the use of dedicated supply air
dampers.
Dedicated supply air dampers are not required if the damper response time
is acceptable, under the following conditions:
• Negative pressurization of the smoke zone is considered accomplished
when the total flow rate (CFM) supplied to the zone drops below 50% of
its maximum while its associated dedicated exhaust damper is fully
open.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
74
Page 91
Restrictions and General Comments
•
Positive pressurization of a smoke-control zone is considered
accomplished when the total flow rate (CFM) supplied to the zone
reaches 50% of its maximum while its associated dedicated exhaust
damper is fully closed.
Additionally, if the local Authority Having Jurisdiction (AHJ) determines that
the longer damper travel times specified are acceptable, the dedicated
supply air dampers can be omitted.
Class 2 Powered Devices
EIA-485 Termination and Bias Resistors
All I/A Series BACnet controllers that specify the use of a Class 2 power
transformer must use one of the transformers listed in Appendix B. The use
of these transformers, in conjunction with the published wiring and
installation literature listed in Appendix C, provides compliance with the
power-limited circuit requirements of UL 864 and the National Electrical
Code (NEC).
With the exception of MS/TP buses that use the MS/TP repeaters listed in
Appendix B, all other MS/TP bus installations must adhere to the application
of EOL (end-of-line termination) and Bias resistor jumpers as overviewed
here and detailed in the documents referenced in Appendix C. The
MNB-1000 and MNB-300 controllers each provide jumpers that can enable
or disable EOL and Bias resistors. The MNB-V1 and MNB-V2 controllers are
not equipped with these jumpers.
Each MS/TP trunk must have an EOL resistor active at each end. When
MNB-1000 and MNB-300 controllers are present at the ends, their EOL
jumpers can be placed in the Enabled position to achieve this. If the device
at the end of the MS/TP trunk is an MNB-V1 or MNB-V2 controller, then a
120 : resistor, EMSC-546, must be placed across the “MSTP +” and
“MSTP –“ terminals. This is the EOL resistor specified in Appendix B. No
other EOL resistors shall be present on the bus.
For Bias resistors, each MS/TP bus must have a minimum of one, and a
maximum of two, sets active. The Bias resistors can be installed at any point
on the bus. If two sets are active, each would typically be installed towards
one of the ends of the bus. If only one set is active, then it would typically be
installed towards the center of the bus length. The MNB-1000 and MNB-300
controllers are each equipped with two Bias resistor jumpers that can be
placed in the Enabled or Disabled positions for this purpose. The MNB-V1
and MNB-V2 controllers do not feature user-configurable bias resistors.
System Self-Tests To maintain system integrity, dedicated system equipment must incorporate
an automatic weekly self-test of each smoke-control function. The self-test
consists of the smoke-control system automatically commanding the
associated function to operate, and expecting that the associated proof
sensor operates within a specified period of time. The response time is
60 seconds for a fan and 75 seconds for a damper. For a discussion of
response times, refer to "Response Time" on page 8.
Valid proof sensor operations are not required to be annunciated. However,
the lack of an expected proof sensor operation must produce, at the FSCS,
an audible trouble signal and an indication (with an LED) of the specific
device that did not operate. Whenever an automatic test of the dedicated
system equipment fails, annunciation of the failed state must be maintained
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 75
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Chapter 5
at the FSCS until acknowledged by an operator. This acknowledgment is
from the FSCS. It is acceptable for the failure state to require manual
clearing from the I/A Series BACnet system to return it to normal operation,
once the acknowledgment has been made.
Transformers Only the transformers listed in Appendix B can be used with I/A Series
BACnet controllers (UL 864 UUKL/UUKL7 Listed) that directly take part in
smoke-control operation. Certain transformers must be mounted in
enclosures to meet UL 864 UUKL/UUKL7 requirements, as shown in
Table–5.1.
Table–5.1 Transformer Enclosure Requirements.
Transformer Description Enclosure Required
EMSC-541
EMSC-542
EMSC-543
EMSC-583 75 VA, 120 V Pri., 24 V Sec., 50/60 Hz, Class 2
EMSC
EMSC
a. EMSC-541, EMSC-542, and EMSC-543 are not approved for use in smoke control applications in Canada, covered in ULC Standard
ULC-S527-99.
a
a
a
-616
-618
50 VA, 120 V Pri., 24 V Sec., 50/60 Hz, Fused
(nonreplaceable) Primary
100 VA, 120 V Pri., 24 V Sec., 50/60 Hz, Fused
(nonreplaceable) Primary
240 VA, 120 V Pri., 24 V Sec., 60 Hz, Fused (nonreplaceable)
Primary
75 VA, 120 V Pri., 24 V Sec., 50/60 Hz, Class 2, Foot Mount
Single Hub UL-Listed w/Circuit Breaker, Mounting Plate
Included
96 VA, 120 V Pri., 24 V Sec., 50/60 Hz, Class 2, Foot Mount
Single Hub UL-Listed w/Circuit Breaker, Mounting Plate
Included
• No Enclosure Required
• No Enclosure Required
• UL-50 Listed Enclosure
• Uses conduit fittings
or
• UL-50 Listed Enclosure
• Uses conduit fittings
or
-50 Listed Enclosure
•UL
• Uses conduit fittings
or
•UL
-50 Listed Enclosure
Enclosures Some of the controllers, repeaters, and IP infrastructure devices listed in
Appendix B do not feature integral enclosures. These devices must be
mounted inside one of the enclosures approved for smoke-control
applications. Table–5.2 lists these devices and the corresponding, required
enclosures.
Table–5.2 Approved Enclosures for Smoke Control Applications.
Enclosures
Devices
-1000 X X X
MNB
MNB-300 X X X
MNB-V1 X X
MNB-V2 X X
MS/TP Repeaters XX
IP Switches X
a. If allowed by the FSCS manufacturers listing. ADI FSCS panels provide this option.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
76
MNB
-1000-ENC MNB-300-ENC MNA-FLO-1
FSCS
Enclosure
UL
Integral
a
-50
Listed
Page 93
Restrictions and General Comments
Wiring The FSCS can interface to I/A Series MicroNet BACnet controllers, either
through the ADI ModBus EIA-485 (RS-485) interface of the MNB-1000 or
through individual I/O points.
ADI ModBus EIA-485 Interface
The Remote I/O bus of the MNB-1000 controller, when used with the ADI
FSCS ModBus interface, requires use of the same type of wiring as
specified for the MS/TP bus (Table–5.3). The MNB-1000 will typically be
mounted inside the same enclosure as the FSCS. However, if the
MNB-1000 is located external to the FSCS panel, then the wire length
between the controller and the UUKL smoke-control system must not
exceed 20 feet, and the I/O wiring must be run in conduit. End-of-line
terminations must be present at both ends of the bus. This is accomplished
by placing the I/O EOL jumper of the MNB-1000 in the Enabled position, and
by installing a termination resistor at the FSCS end of the bus. Refer to the
documentation associated with the ADI FSCS for additional information
regarding ADI’s EIA-485 ModBus termination requirements.
Individual I/O Points
Anytime discrete I/O points are used and the FSCS manufacturer is
approved to allow the installation of I/A Series BACnet controllers inside the
FSCS panel, the distance and conduit requirements listed in Table–5.3 are
not applicable. In all such cases, the wiring to the FSCS is still considered
unsupervised.
The ADI ModBus interface wiring and I/O wiring that connects the I/A Series
BACnet controllers to either the UUKL listed FSCS or the UOJZ listed fire
alarm panel, are considered unsupervised. When this wiring is external to
the UUKL listed FSCS or UOJZ listed fire alarm panel, the I/A Series
BACnet controllers must be mounted within 20 feet of the panel to which
they are connected, and the wiring must be run in conduit. Table–5.3 lists the
general requirements for wiring associated with I/A Series BACnet
smoke-control applications.
Table–5.3 Wiring Requirements.
Wiring Status
IP LAN Supervised by object programming
Ethernet LAN Supervised by object programming
MS/TP Bus Supervised by object programming
ADI ModBus Interface Supervised by object programming
Unsupervised. When the controller and the FSCS are
I/O to FSCS
I/O to Fire Alarm Panel
Remaining I/O Unsupervised
not located in the same panel, wiring must be run in
conduit and controllers must be located within 20 ft of
the panel
Unsupervised. Wiring must be run in conduit and
controllers must be located within 20 ft of the panel.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 77
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Chapter 5
Hardware and Firmware Upgrade Process Requirements
UL-1459 (Abnormal Overvoltage) Compliance
Each MNB-1000, MNB-300, MNB-V1 or MNB-V2 controller is shipped from
the factory with a label affixed to the unit, documenting its original firmware
version. However, the firmware in these controllers may be field-upgraded
by authorized personnel, using any version of firmware that is approved for
use in UUKL Listed systems. Because of this, a means must be found to
identify a unit’s currently installed firmware version. One such means is the
WorkPlace Commissioning Tool. Using this tool, you can browse the network
of controllers and employ one of two methods for identifying a controller’s
firmware version. In the first method, you view the controller’s Properties,
which shows the firmware version, as well as other data. In the second
method, you enable the Firmware column on the Commissioning Tool’s main
page so that it displays the current firmware version for each controller.
When applying I/A Series BACnet controllers to a UUKL smoke-control
application, it is acceptable for the communication trunks (LANs and buses)
to be run from one building to another. Whenever the cabling leaves a
building in such an application, it must be isolated from the next building
through the use of fiber optic cable. An MS/TP bus can be converted to fiber
optic cable through use of the appropriate UUKL-approved repeater.
Ethernet and IP LANs can be converted to fiber optic cable through the use
of the appropriate UUKL-approved IP infrastructure devices. Refer to
"Approved MS/TP Repeaters" on page 72 and "Approved IP/Ethernet
Infrastructure Devices" on page 71 for more information on the use of these
types of devices.
General Comments
FSCS Requirement In some cases, the FSCS may be considered optional. The Authority Having
Jurisdiction (AHJ) determines whether an FSCS is required.
MNB-1000 Using ADI ModBus Interface
Job Estimating When estimating a job using I/A Series BACnet devices for controlling
When using the MNB-1000’s ADI ModBus EIA-485 (RS-485) interface to
communicate with an ADI ModBus FSCS, consider the following:
• The MNB-1000’s unused I/O points, S-Link interface, and MS/TP bus
can be used for other related or unrelated purposes, as long as those
purposes do not adversely impact the smoke-control sequence or
violate any of the UUKL installation requirements.
• Only UUKL listed or approved devices can be located inside the ADI
FSCS panel.
• If an FSCS panel from a vendor other than ADI is used, check the
requirements of that vendor to determine the available mounting
options.
smoke-control equipment (requiring UL 864 UUKL/UUKL7 and NFPA 92A
compliance), consideration must be given to the number of additional
devices that are required for end process verification and interfacing to the
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
78
Page 95
Restrictions and General Comments
FSCS. As seen below, whenever an MNB-1000 controller with ADI ModBus
support is used to interface with an ADI ModBus FSCS, the number of
additional points required to support the FSCS is substantially reduced.
Fans
For most fans, the following additional points are required:
• One DI (digital input) point for fan flow.
• Two DI points to serve the ON/OFF fan-control commands from the
FSCS.
• One DO (digital output) point to send proof of the current fan condition
back to the FSCS.
Note: The two DI points for the ON/OFF commands from the FSCS, and the
one DO point for the proof of current fan condition, are not required if the
MNB-1000 with ADI ModBus support is used to interface with an ADI FSCS.
These additional points are only required if discrete I/O points are hardwired
to an FSCS.
Dampers
For most dampers, the following additional points are required:
• Two DI points for monitoring the end-of-travel switches.
• Two DI points for the drive open and drive closed commands from the
FSCS for controlling the dampers.
• Two DO points to send proof of position back to the FSCS.
Note: The two DI points for the drive open/closed commands from the
FSCS and the two DO points for the proof of position will not be required if
the MNB-1000 with ADI ModBus support is used to interface with an ADI
FSCS. These additional points will only be required if discrete I/O points are
hardwired to an FSCS.
In some cases, a flow sensor or switch may be used to determine damper
position. In these situations, only one AI (analog input) or DI may be
required, instead of the two as noted above.
Additional points are required for monitoring the fire and smoke alarm
contacts of the UOJZ listed fire alarm panel, and for controlling the trouble
LEDs (general and dedicated) associated with the FSCS. The number of
points required for these functions varies with each application but must be
considered when estimating the job.
Note:
• The additional points required to control the trouble LEDs associated
with the FSCS are not required if the MNB-1000 with ADI ModBus
support is used to interface with an ADI FSCS. These additional points
are only required if discrete I/O points are hardwired to an FSCS.
• Any UOJZ listed fire alarm panel with programmable N.O. (normally
open) relay contacts can be used with I/A Series BACnet controllers.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 79
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Chapter 5
Spare I/O Points When I/A Series BACnet controllers interface to the FSCS or fire alarm
panel, any spare I/O points that exist on these controllers can be used for
other control purposes, as long as those purposes do not adversely impact
the smoke-control sequence or violate any of the UUKL installation
requirements.
Lost Communications
Discrete I/O
In all I/A Series BACnet smoke-control systems where discrete I/O wiring is
used to control the FSCS, one controller must be connected to the FSCS to
control the system trouble output. The system trouble output must be
applied in such a way that anytime this controller loses communication with
its parent controller, or loses its power source, the system trouble output
assumes the failure state.
Example—Lost Communication: A DO point within an I/A Series BACnet
controller is connected to normally closed (N.C.) contacts within the FSCS.
These contacts are, in turn, wired to the system trouble input. Whenever the
controller containing the DO point is powered and communicating with its
parent controller, and no other system troubles exist, the DO point is
commanded ON and the N.C. contacts are open. This is the normal state, in
which the system trouble indicator and audible alarm are OFF. If
communication between this controller and its parent controller fails, or this
controller loses power, the DO point is de-energized and the N.C. contacts
close, causing the FSCS to illuminate the system trouble visual indicator and
audible signal.
Lost Communication Between MNB-1000 and FSCS
When the MNB-1000 controller communicates with the ADI FSCS through
the ADI ModBus interface, any loss of communication between these
devices must cause the FSCS to activate its system trouble LED and audible
alarm. Support must also be provided for silencing the audible annunciation
in this situation. The ADI FSCS referenced in Appendix B provides, in its
firmware, support for these features. A Communications Timeout value is
provided on the Configuration tab of the ADI Object Configuration screen,
within the ADI Wizard. This value defines the amount of time that can
elapse, without communication, before the FSCS indicates a lost
communication fault. More information is provided in the WorkPlace Tech
Tool 5.7 Engineering Guide Supplement, F-27356.
IP, Ethernet, and MS/TP Networks
To assure compliance with UL mandated response times, all smoke-control
systems require the use of object programming to detect lost
communications between controllers on the IP, Ethernet, and MS/TP
networks. Figure–5.5 shows the MSTP Status and Device Status objects
available for this purpose. In the case of the Device Status object, the five
possible configurations are included. Their design requires no timing
adjustments by the application engineer. In some cases, they will be
dependent upon network performance. UL states that the time between the
occurrence of a transmission fault and its trouble annunciation shall not be
more than 200 seconds.
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
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Page 97
Restrictions and General Comments
Each smoke-control system must have at least one MNB-1000 controller
present that coordinates the monitoring of the communication status of all
devices on the various networks. As such, this controller is considered the
master device of the network. This is the controller that provides the ADI
ModBus interface and is typically located inside the FSCS panel. All
communication status objects associated with the smoke-control system
reside in this master controller. No communication status objects are
required in any of the other controllers in the system.
The MSTP Status and Device Status objects are described in detail in the
WorkPlace Tech Tool 5.7 Engineering Guide Supplement, F-27356, which is
referenced in Appendix C. In all cases, the Status output of the objects is
“100” if communication is lost and “0” if communication is good. A synopsis
of their function and application in smoke-control systems is given in the
notes in Figure–5.5.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 81
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Chapter 5
Example A – MSTP Status
This MSTP Status object is configured to monitor a single
MSTP device. The monitored device is specified by the
value of the object's MSTPAddr (MSTP address) property
and the network number connected to the Network input
property. In this case, device address 99 on network 31 is
being monitored. This is the object most frequently used to
monitor an MSTP device connected to an MNB-1000
controller.
Example B – Device Status
In this example, the Device Status object is configured to
monitor a single MSTP device, device address 2 on
network 31. The object's Configuration screen allows you
to select different types of communication networks,
including MS/TP. To monitor the chosen device, "MS/TP"
was selected as the device type, the Network Number was
set to "31," and the MS/TP Address (set by DIP switch)
was set to "2." This object is most frequently used when it
is necessary to poll for the device status based on
Network Number and MSTP Address.
Example C – Device Status
In this example, the Device Status object is configured to
monitor a single device based on its Instance Number. To
do this, "Device ID" was selected as the device type and
the Device Instance was set to "1100." With these settings,
this object is monitoring device instance 1100 on the
BACnet network (regardless of its communications type).
This object is most frequently used when it is necessary to
poll for the device status based solely on the Instance
Number.
Example D – Device Status
In this example, the Device Status object is configured to
monitor a single BACnet IP device. To do this, "BACnet IP"
was selected as the device type, the Network Number was
set to "1876," the IP Address was set to “10.1.144.99,” and
the IP Port was set to "9." With these settings, this object
is monitoring a BACnet IP device whose address is
“10.1.144.99:9” on network 1876. This object is most
frequently used when it is necessary to poll for the device
status of an MNB-1000 controller configured for BACnet IP.
Example E – Device Status
In this example, the Device Status object is configured to
monitor a single BACnet Ethernet device. To do this,
"Ethernet" was selected as the device type, the Network
Number was set to "888," and the Ethernet MAC Address
was set to “00-01-F0-00-4A-95”. This example is
monitoring a BACnet Ethernet device whose address MAC
Address is “00-01-F0-00-4A-95” on network 888. This
object is most frequently used when it is necessary to poll
for the device status of a BACnet Ethernet configured
MNB-1000 controller.
Example F – Device Status
In this example, the Device Status object is configured to
monitor all devices on an MSTP bus under an MNB-1000
controller. Using this object in this manner requires that
first an MSTP Status object is defined for each controller
(to be monitored) on the MSTP bus. To set up this Device
Status object, "Network" was selected as the device type
and the Network Number was set to "30." With these
settings, the Device Status object is configured to monitor
the status of all MSTP Status objects that have been
defined in the MNB-1000 controller and assigned a
network number of 30. This object is specifically designed
to logically “OR” the defined group of MSTP devices on a
single network and provide a single Status output value.
Figure–5.5 Available Communication Status Monitoring Objects.
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Restrictions and General Comments
Custom Objects for MS/TP Communication Status
To expedite the process of setting up communication status monitoring of
multiple MS/TP devices under multiple MNB-1000 controllers, two Custom
Objects have been created and placed on an Application Objects Stencil as
a published application. Go to Tech Zone, on the Schneider Electric Web
site, “The Source.” These objects provide a means to add a single custom
object for each MS/TP network (under an MNB-1000 controller) to be
monitored. They automatically create and add, to the application, all of the
objects required to monitor a network of 127 MS/TP devices. The user
simply changes the network number associated with each device and
deletes the MSTP Status objects for any controllers that are not required or
present. The use of these Custom Objects, in conjunction with variations of
the MSTP Status and Device Status objects discussed previously, provide
the monitoring of communication status required to meet UUKL for the
complete smoke-control network. In many cases, it is necessary to logically
“OR” the outputs of these objects to generate a single output that is
combined into the System Trouble LED control signal.
Preventing False Indication of Lost Communications
When downloading to controllers, resetting them, or cycling power to them,
the system may annunciate a system trouble, which lights the System
Trouble LED and sounds an audible alarm at the FSCS. Since these
situations should only occur when a user with manager-level access
(“programmer” or “authorized person”) makes adjustments to the system,
that user must take appropriate steps to prevent false indications of lost
communication, by temporarily overriding the System Trouble signal. Such
overrides should only be performed by authorized personnel.
Use of BACnet Priority Structures
In this case, “false” implies that the loss of communication was not due to a
failure but was, instead, caused by servicing of the system. Once the
manager-level user has completed their activities, the temporary overrides
must be removed and the system verified as having returned to a fully
functional state.
An I/A Series MicroNet BACnet smoke-control system should be designed
to use the BACnet priority structures associated with many of the BACnet
objects. Adherence to the intended functional description for each priority
input provides the system-wide support necessary to assure the integrity of
the smoke-control system, while allowing other BACnet devices to provide
overlay HVAC and day-to-day control. Therefore, use of the “Manual Life
Safety (1)” and “Automatic Life Safety (2)” priority inputs of various objects
on the application level lays the foundation for the use of non-UUKL devices,
such as the UNC-520 and ENC-520 controllers, as overlay devices. These
devices must be isolated (see "Coexistence and Isolation of Non-UL 864
Devices on the MS/TP Bus" on page 72) and must not in any way adversely
impact the ability of the smoke-control system to perform its function. The
Command Priority object has been created specifically for this purpose and
should be used whenever the integrity of the BACnet priority structures must
be maintained.
F-27419-2 TAC I/A Series MicroNet BACnet Smoke Control Systems Manual 83
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Chapter 5
Figure–5.6 Installation of Transient Suppressor EMSC-621 on DOs of MNB-300.
Use of Transient Suppressor on MNB-300 DO
24H
24G COM
GND
TO1 (DO1)
C1
TO2 (DO2)
C2
TO3 (DO3)
C3
TO4 (DO4)
C4
TO5 (DO5)
C5
TO6 (DO6)
C6
If one or more I/O points of an MNB-300 are used for smoke control, then
every used DO (Triac) point must have an EMSC-621 Transient Suppressor
installed. The EMSC-621’s gray wires connect to any two used outputs (for
example, TO1 and TO2) and the green wire connects to either 24 COM or
GND, on the power connector. Figure–5.6 shows three typical scenarios for
connectiing the EMSC-621 to the DO (Triac) terminals.
24H
OR
24G COM
GND
TO1 (DO1)
C1
TO2 (DO2)
C2
TO3 (DO3)
C3
Gray
To
Load
OR
To
Load
To
Load
Installed on Two
Gray
Adjacent Used DOs
Green
Gray
EMSC-621
Installed on Two
Non-adjacent DOs
Green
Gray
To
Load
EMSC-621
24H
24G COM
GND
TO1 (DO1)
C1
OR
1 When only one DO is being used,
install an EMSC-621 so that one
gray wire is inserted into the
terminal of the active DO, while the
free gray wire is inserted into the
terminal of an unused DO.
Optionally, the free gray wire may
be capped with a wire nut.
Installed on Single
To
Load
Gray
Green
Used DO
EMSC-621
TO2 (DO2)
C2
TO3 (DO3)
C3
TAC I/A Series MicroNet BACnet Smoke Control Systems Manual F-27419-2
84
1
Unused DO
Gray
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