Schneider Electric TAC I/A Series Operating Instructions

TAC I/A Series MicroNet BACnet

Wiring, Networking, and

Best Practices Guide

TAC I/A Series MicroNet BACnet

Wiring, Networking, and

Best Practices Guide

Printed in U.S.A. 06-14 F-27360-11

Distributed, manufactured, and sold by Schneider Electric. I/A Series trademarks are owned by Invensys Systems, Inc. and are used on this product under master license from Invensys. Invensys does not manufacture this product or provide any product warran ty or support. For service, support, and warranty information, contact Schneider Electric.

All brand names, trademarks and registered trademarks are the property of th eir respective owners. Information contained within this document is subj ect to change without notice.

Schneider Electric

F-27360-11 June 2014 tl

Preface

Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

Applicable Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x

Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi

Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . .xii

Acrobat (PDF) Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xii

Abbreviations and Terms Used in this Manual . . . . . . . . . . . . . . .xii

Manual Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xii

Chapter 1 I/A Series BACnet Hardware

MicroNet BACnet Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Common Controller Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

BACnet Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MNB-300 Unitary Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

MNB-V1, MNB-V2 VAV Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . 5

MNB-70 Zone Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

MNB-1000 Plant Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

MNB-1000-15 Remote I/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Input and Output Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Universal Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Universal Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Digital Outputs, Triac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

20 Vdc Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Inputs from MN-Sx MicroNet Sensor . . . . . . . . . . . . . . . . . . . . . . 19

Velocity Pressure Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

MicroNet Digital Wall Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Common Sensor Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Keypad Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

LCD Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Diagnostic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Communications Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Intermixing of Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide iii

Table of Contents

Chapter 2 Networking Practices

Sensor Link (S-Link) Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

MicroNet MS/TP Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 26

ADI and Remote I/O Network Wiring . . . . . . . . . . . . . . . . . . . . . . 27

I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Power Supply Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Sensor Link (S-Link) Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

MicroNet MS/TP Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Approved Cable Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

ADI and Remote I/O Module Network Wiring . . . . . . . . . . . . . . . . . . 31

Wiring Specifications for ADI or Remote I/O . . . . . . . . . . . . . . . . 31

I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Power Supply Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Introduction to BACnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Architecture Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

MS/TP Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Physical Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Number of Connected Devices . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Logical Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Addressing Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Limits to Number of Polled Points . . . . . . . . . . . . . . . . . . . . . . . . 43

Limits to Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Connection to an MS/TP Network . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Remote I/O Network Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Physical Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Number of Connected Devices . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Logical Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Addressing Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Increased I/O Count . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

MS/TP Network Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Master and Slave Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Physical Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Required Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

MS/TP Address for BACnet Tools . . . . . . . . . . . . . . . . . . . . . . . . 47

Other Network Setup Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Port Bridging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Single Path to Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Routers and Network Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Network Setup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Set the DIP Switches on the Controllers . . . . . . . . . . . . . . . . . . . . . . 52

iv MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

MS/TP Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Remote I/O Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Power on the MNB-xxxx Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Commission UNCs and ENCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Commission the Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Chapter 3 Checkout and Troubleshooting

Mechanical Hardware Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Communications Hardware Checkout . . . . . . . . . . . . . . . . . . . . . . . . . 55

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Field-replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

BACnet Best Practices

I/A Series MicroNet BACnet System Architecture Overview . . . . . . . . 64

MS/TP Network Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Master-Slave Token Passing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

BACnet Rules that Must be Followed . . . . . . . . . . . . . . . . . . . . . . . . . . 69

General BACnet Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

No Duplicate Device Instances . . . . . . . . . . . . . . . . . . . . . . . . . . 69

No Duplicate Object Identifiers within a Device . . . . . . . . . . . . . . 69

No Duplicate Network Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Devices on a Network Must Share a Single Network Number . . . 69

One Communication Path Only . . . . . . . . . . . . . . . . . . . . . . . . . . 69

MS/TP Network Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

No Duplicate Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Install Terminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Set Bias Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Use Proper Communication Cable . . . . . . . . . . . . . . . . . . . . . . . 72

Bond the Shield to a Proper Ground . . . . . . . . . . . . . . . . . . . . . . 72

BACnet Best Practice Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Selection of WP Tech Object Type for BACnet . . . . . . . . . . . . . . . . 73

MS/TP Network Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Keep Exposed Communication Conductors Short . . . . . . . . . . . . 73

Do Not Nick the Insulation When Removing the Cable Sheath . . 74

Make Low Resistance Terminations . . . . . . . . . . . . . . . . . . . . . . 74

Address Devices Consecutively . . . . . . . . . . . . . . . . . . . . . . . . . . 74

A Router’s Address Should Be 0 (Zero) . . . . . . . . . . . . . . . . . . . . 74

Few Controllers Per Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Use BACnet/IP for the MNB-1000 . . . . . . . . . . . . . . . . . . . . . . . . 74

Use Higher Baud Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Use Auto-baud to Change Baud Rate . . . . . . . . . . . . . . . . . . . . . 75

Add a Controller as MS/TP Slave After a Failed Upgrade . . . . . . 75

Power the Controllers Properly . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Repeaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Set MaxInfoFrames to Value Greater Than 1 . . . . . . . . . . . . . . . 76

Set the MaxMaster Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Tuning the MaxMaster Property . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Discussion of Joining Token Passing . . . . . . . . . . . . . . . . . . . . . 78

Table of Contents

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide v

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Understanding the Transmit and Receive Data LEDs on MS/TP Net-

works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

BACnet/IP Network Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Set the gateway address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Use BBMDs When Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

BACnet/IP Through a NAT Router . . . . . . . . . . . . . . . . . . . . . . . . 81

BACnet Ethernet Network Guidelines . . . . . . . . . . . . . . . . . . . . . . . . 81

BACnet/Ethernet is Not Routed . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Do Not Leave BACnet/Ethernet Enabled if Not Used . . . . . . . . . 81

BACnet Guidelines for UNCs and ENCs . . . . . . . . . . . . . . . . . . . . . 81

Fewer Points Equals Better Performance . . . . . . . . . . . . . . . . . . 81

Use Poll On Demand for Schedules, Alarms, and Trends . . . . . . 82

Delete Unused Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Keep the UNC or ENC Routing . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Keep the Processor Idle Time Above 20% . . . . . . . . . . . . . . . . . . 83

UNC and ENC Bias Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Use COV Subscription for Slowly Changing Points . . . . . . . . . . . 83

Do Not Use COV for Priority Type Points . . . . . . . . . . . . . . . . . . . 84

Tuning Policy for ENC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

General BACnet Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Consider Network Design Carefully . . . . . . . . . . . . . . . . . . . . . . . 84

Remote Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

BBMDs–

Connecting BACnet/IP Devices on Different Subnets . . . . . . . . . . . 85

Setup of BBMD in the MNB-1000 . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Use of VPN for Off-site Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Using a BBMD with an NAT Router . . . . . . . . . . . . . . . . . . . . . . . . . 90

WP Tech/WPCT BACnet/IP Remote Connection Setup . . . . . . . . . 91

Performance Improvements for MS/TP . . . . . . . . . . . . . . . . . . . . . . . . . 94

Implementing Performance Im pr ov em e nts . . . . . . . . . . . . . . . . . . . . 94

COV Subscription in a UNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

COV Subscription in an ENC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Using AdminTool Object to Change useCOV Value . . . . . . . . . . . . . 98

Preparation for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Performing a Search and Replace . . . . . . . . . . . . . . . . . . . . . . . 100

Optimizing the covIncrement Value . . . . . . . . . . . . . . . . . . . . . . . . 101

COV Subscription Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

covIncrement Value too Small . . . . . . . . . . . . . . . . . . . . . . . . . . 101

covIncrement Value too Large . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Choose the Right covIncrement Value . . . . . . . . . . . . . . . . . . . . 102

The Type of Point Affects COV Efficiency . . . . . . . . . . . . . . . . . . . 103

Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Setting Up a Remote I/O Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Installing Remote I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Configuring Remote I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . 105

The Remote I/O Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Understanding the Transmit and Receive Data LEDs on Remote I/O

Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

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Remote I/O Best Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

EOL Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Bias Resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Fallback Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide vii

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viii MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

Preface

Purpose of this Manual

This TAC I/A Series MicroNet™ BACnet™ Wiring, Networking, and Best Practices Guide is a reference for creating a network of TAC I/A Series MicroNet BACnet controllers. This guide provides the following discussions and instructions for the TAC I/A Series MicroNet BACnet series:

• Best practices related to the configuration and maintenance of a T AC I/A

ries MicroNet BACnet system

• TAC I/A Series MicroNet BACnet Controllers and Remote I/O Modules,

d their features

• Controller and module wiring terminals and wiring recommendations

• Controller and module input and output specifications

• TAC I/A Series MicroNet Digital Wall Sensors and their features

• Diagnostic functions of the TAC I/A Series MicroNet Digital Wall Sensors

• BACnet overview

• TAC I/A Series MicroNet BACnet system architecture overview

• MS/TP and Remote I/O Network configuration, including physical and

ogical restrictions

• How to network into an IP over an Ethernet backbone

Other literature related to the implementation of a TAC I/A Series MicroNet BACnet system are referenced througho ut this gu ide an d ar e lis te d in

"Applicable Documentation,” on page x.

It is assumed that readers of this manual already understand basic HVAC concepts. An understanding of BACnet networking and communications, as well as a general understanding of Ethernet networks, is also helpful. This manual is written for:

• Applicatio n en gin eer s.

• Users who change hardware or control logic.

• Schneider Electric technicians and field engineers.

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide ix

Applicable Documentation

F-Number Description Audience Purpose

Provides a programming reference for

F-27254

F-27255

F-27356

TAC I/A Series WorkPlace Tech Tool Engineering Guide.

TAC I/A Series WorkPlace Tech Tool User’s Guide

TAC I/A Series WorkPlace Tech Tool BACnet Engineering Guide Supplement

– Application Engineers – Service Personnel

– Application Engineers – Installers – Start-up Technicians – Service Personnel

– Application Engineers – Service Personnel

MicroNet controllers. Gives detailed descriptions for each of the Control Objects used with MicroNet controllers.

Provides step-by-step instructions for using the WorkPlace Tech Tool, version 4.0.

Provides supplemental information for programming MicroNet BACnet controllers. Gives detailed descriptions for each of the unique BACnet Control Objects used with these controllers.

F-27419

F-27358

F-27365

F-27461

F-27462

F-27463

F-27485

T AC I/A Series MicroNet BACnet Smoke Control Systems Manual

T AC I/A Series MicroNet BACnet WorkPlace Commissioning Tool and Flow Balance T ool User’s Guide

T AC I/A Series MicroNet BACnet MNB-70, MNB-300, MNB-V1, and MNB-V2 Controllers BACnet PIC Statement

T AC I/A Series MicroNet BACnet MNB-1000 Controller BACnet PIC Statement

TAC I/A Series UNC-520 Universal Network Controller BACnet PIC Statement

TAC I/A Series ENC-520 Enterprise Network Controller BACnet PIC Statement

T AC I/A Series ENS-1 Enterprise Network Server BACnet PIC Statement

– Application Engineers – Installers – Start-up Technicians – Service Personnel

– Application Engineers

Provides information for creating smoke control systems that meet a UL 864 UUKL/UUKL7 project specification, using MicroNet BACnet controllers.

Provides step-by-step instructions for using the WorkPlace Commissioning Tool and Flow Balance Tool.

Provides BACnet compliance information on MicroNet BACnet MNB-70, MNB-300, MNB-V1, and MNB-V2 controllers.

Provides BACnet compliance information on the MicroNet BACnet MNB-1000 controller.

Provides BACnet compliance information on the UNC-520 controller.

Provides BACnet compliance information on the ENC-520 controller.

Provides BACnet compliance information on the ENS-1 enterprise network server.

– Application Engineers – Installers – Service Personnel – Start-up Technicians

Provides step-by-step mounting and installation instructions for the MicroNet MNB-70 Controller.

Provides step-by-step mounting and installation instructions for the MicroNet MNB-300 Controller.

F-27456

F-27345

TAC I/A Series MicroNet BACnet MNB-70 Zone Controller Installation Instructions

TAC I/A Series MicroNet BACnet MNB-300 Unitary Controller Installation Instructions

x MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

F-Number Description Audience Purpose

Preface

TAC I/A Series MicroNet BACnet

F-27346

F-27347

F-27486

F-26277

MNB-V1, MNB-V2 VAV Controllers Installation Instructions

TAC I/A Series MicroNet BACnet MNB-1000 Plant Controller Installation Instructions

TAC I/A Series MicroNet BACnet MNB-1000-15 Remote I/O Module Installation Instructions

TAC I/A Series MicroNet MN-SX Series Sensors General Instructions

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 BACnet Engineering Guide Supple-

ment, F-27356.

Acrobat (PDF) Conventions

If you are reading this manual online in Adobe® Acrobat® (.PDF file format), numerous hypertext links exist, both in normal black text and in blue text.

• 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.

Abbreviations and Terms Used in this Manual

Refer to Glossary for definitions, abbre viations, and acron yms that may be used in this document:

Manual Summary The MicroNet BACnet Wiring, Networking, and Best Practices Guide

contains three chapters. Chapter 1, I/A Series BACnet Hardware, provides a brief overview of the

various I/A Series sensors.

Chapter 2, Networking Practices, provides an overview of the BACnet protocol and, more specifically, its implementation in the TAC I/A Series MicroNet BACnet system. This chapter then explains how TAC I/A Series MicroNet BACnet controllers and sensors are configured for an MS/TP network. It also explains how remote I/O networks are constructed by connecting one to eight remote I/O modules to an MNB-1000 controller.

Chapter 3, Checkout and T roubleshooting , provides steps for determini ng the proper operation of the TAC I/A Series MicroNet BACnet system and suggests corrective actions for any discovered faults.

Appendix A, BACnet Best Practices, provides best practices information for creating and maintaining a network of TAC I/A Series MicroNet BACnet controllers, remote I/O modules, and sensors, a nd pr ovides ad ditional d etail for information contained elsewhere in this document.

MicroNet BACnet controllers, remote I/O modules, and

xii MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

Chapter 1 I/A Series BACnet Hardware

This chapter provides a brief overview of the various I/A Series MicroNet BACnet controllers and sensors, including:

• Common Controller Features

• BACnet Compliance

• MNB-300 Unitary Controller

• MNB-V1, MNB-V2 VAV Controllers

• MNB-70 Zone Controllers

• MNB-1000 Plant Controller

• MNB-1000-15 Remote I/O Module

• MicroNet Digital Wall Sensors (MN-Sx Series)

MicroNet BACnet hardware products include controllers and compa tible sensors.

• MicroNet BACnet controllers provide direct-digital control for packaged

rooftop, heat pump, fan coil, unit ventilator , and VAV, as well as complex mechanical equipment such as central station air handlers, VAV air handlers, and cooling towers. Five basic controller platforms are available, each with a number of I/O points and supp ort for a digital roo m temperature or humidity sensor (MicroNet sensor).

• MicroNet sensors are digital wall temperature and humidity sensors

designed specifically for use with MicroNet controllers. 12 different models offer varying levels of sensor push-buttons and LCD screens.

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 1

Chapter 1

MicroNet BACnet Controllers

There are five hardware platforms for MicroNet BACnet controllers: the MNB-70, the MNB-300, the MNB-V1, the MNB-V2, and the MNB-1000. In addition, the MicroNet BACnet family includes the MNB-1000-15 remote I/O module. Each of these platforms is described in the following sections.

Common Controller Features

BACnet Compliance

While all controller platforms differ by their physical characteristics and numbers and types of I/O points, all controller plat forms provide the following common features:

Note: See"MNB-1000-15 Remote I/O Module" on page 13 for features of the remote I/O module.

• 24 V ac powered.

• Capability to function in standalone mode or as part of an I/A Series

building automation network.

• Support for a digital MicroNet sensor via a Sensor Link (S-Link) bus.

• Sequence of operation and BACnet image are fully programmable using

WorkPlace Tech Tool (WP Tech) 5.0 or greater.

• Extensive BACnet object and services support.

• DIP switch for setting the physical address.

• LED indication of MS/TP communication link and activity, and controller

status.

• Isolated EIA-485 (formerly RS-485) transceiver for MS/TP

communications.

• Firmware upgradeable over the network or directly to the controller.

Each MicroNet BACnet controller conforms to the requirement s of a BACnet Application Specific Device (B-ASD). For a list of objects suppor ted by these controllers, and the services provided, refer to the BACnet PIC Statements, available on the BACnet Testing Laboratories website

(http://www.bacnetinternational.net/btl/).

2 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

MNB-300 Unitary Controller

The I/A Series MicroNet BACnet Unitary Controller, MNB-300, is an interoperable controller with native BACnet MS/TP communications support. The controller features Sensor Link (S-Link) support, LED status and output indication, screw terminal blocks, as well as a panel-mou nt su b- base w ith removable electronics module. The MNB-300 also includes one end-of-line (EOL) termination and two bias resistors, both of which are jumper-selectable.

When programmed using WP Tech, the MNB-300 provides a wide range of control strategies for packaged rooftop, heat pump, fan coil, unit ventilator, and similar applications.

Unique Features

In addition to common MicroNet BACnet controller features ("Common

Controller Features" on page 2), the MNB-300 offers the following:

• Removable electronics module that mates with panel-mounted subbase.

• Optional NEMA 1 enclosure.

• IAM button for BACnet “I am” message broadcast.

• Integral MS/TP jack for direct connection of a PC with the WP Tech.

• Removable terminals for power and communications, to facilitate

commissioning.

• LED indication of UO and TO state.

Memory Available

T able–1.1 MNB-300 Available Memory.

Model

Number

MNB-300 256 KB 8 KB n/a 4 KB 8 KB

Physical I/O Points

T able–1.2 MNB-300 Inputs and Output s.

Model

Number

MNB-300 636

Refer to "Input and Output Spe cifications" on page 15 for a detailed discussion of each input or output type.

Time Clock

The

MNB-300 controller uses a software clock. This software clock defaults to

a predefined Date/Time following a reset.

Flash SRAM SDRAM EEPROM FRAM

Inputs and Outputs

UI UO DO (Triac)

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 3

Chapter 1

MS/TP Jack

EOL

Enable

Disable

TO1 (DO1)

TO2 (DO2)

TO3 (DO3)

TO4 (DO4)

TO5 (DO5)

TO6 (DO6)

UI1

COM

UI2

UI3

COM

UI4

UI5

COM

UI6

UO1

COM

UO2

UO3

COM

S-LK

IAM

MS+

MS-

SLD

MSB

LSB

MNB-300

Unitary Controller

24H

24G COM

GND

XMT

RCV

STATUS

Physical Address

EN DIS

MS BIAS

Note: Components are

shown in their approximate locations.

Universal Inputs

0 to 5 Vdc 0 to 20 mA 10K Thermistor 1K Balco 1K Platinum 1K Resistive 10K Resistive Digital (dry switched

contact)

Standard Pulse

Fast Pulse (UI1)

Universal Outputs 0 to 20 mA into an 80 to 550

ohm load

S-LK Supports one TAC I/A Series MN-Sxxx Sensor

BACnet Network MS/TP Communications

AC Power

20.4 to 30 Vac 50/60 Hz Class 2 (EN 60742) 16 VA per controller

Digital Outputs (Triac) 12 VA at 24 Vac, 50/60 Hz. Each Triac output individually isolated from AC input and other I/O. Class 2

7 8

2 3

1 Do not exceed two AWG #24

(0.205 mm

) wires per MS/TP

wiring terminal.

2 Power and I/O point wiring

terminals accept up to two AWG #14 (2.08 mm

) or smaller wires.

3 Power and MS/TP connectors

have removable screw terminals

4 Input signals of 1 to 11 Vdc must

be converted to 0.45 to 5 Vdc with a voltage divider, part number AD-8961-220.

5 In applications requiring universal

inputs with ranges of 0 to 20 mA, a 250 ohm

shunt resistor kit, part

number AD-8969-202, is needed.

6 An 11 kilohm shunt resistor kit, part

number AD-8969-206, is required for a 10 kilohm Thermistor Sensor (non-850 series) universal inputs.

7 To detect a closed switch, resistance must

be less than 300

ohm

8 To detect an open switch, resistance must

be greater than 2.5

kilohm

9 External load is not required to illuminate

UO LEDs.

10 Minimum rate of 1 pulse per 4 minutes.

Maximum rate of 1 pulse per second.

11 MS/TP network bias resistors are shipped

in the disabled setting, and are located under the controller’s cover.

12 Minimum rate of 1 pulse per 4 minutes.

Maximum rate of 10 pulses per second.

13 When making an MS/TP cable, use a

1.3 x 3.5 mm Vdc power plug with strain relief (Vimex part number SCP-2009A-T, TAC part number E24-1442, or equivalent). The cable should be no longer than 6 ft. Connect MS+ to the center contact and MS– to the outside contact:

Note: The MS/TP cable described above is available from Schneider-Electric as MNB-CT-CBL. Contact Schneider-Electric for more information.

TO (DO) LEDs (6)

UO LEDs (3)

Internal

Triac

Switches

(Isolated)

Connectors (2)

Figure–1.1 MNB-300 Terminal Connections.

Wiring Terminals

Refer to Figure-1.1 for the power and network communications wiring connections available on the MNB-300 controller.

4 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

SW24H1

SW24H2

SW24H3

24H

24G(COM)

GND

STATUS MSTP RCV

MSTP XMT

UO 1

COM

UI 1

COM

UI 2 UI 3

S-LK/COM

MSTP +

SHLD

MSTP -

MNB-V1, MNB-V2 VAV Controllers

The I/A Series MicroNet BACnet VAV (Variable Air Volume) Controllers, MNB-V1 and MNB-V2, are interoperable controllers with native BACnet MS/TP communications support. Both models incor p or at e: an inte gr a l actuator with manual override; an integral, patented, pressure transducer; three universal inputs; Sensor Link (S-Link) support; LED st atus indication; and over-the-shaft damper mounting. The MNB-V1 controller is designed specifically for cooling applications, while the MNB-V2 controller adds digital and universal outputs that make it suitable for additional VAV applications.

When programmed using WP Tech, these controllers provide a wide range of control strategies for pressure-dependent and pressure-independent terminal boxes, with or without reheat capabilities.

Unique Features

In addition to common MicroNet BACnet controller features ("Common

Controller Features" on page 2), the MNB-V1 and MNB-V2 offer the

following:

• Air balancing performed using WorkPlace Flow Balance Tool (WPFBT).

• Integrated packaging with actuator, pressure transducer, and controller.

• Integral actuator features manual override and travel limit stops for easy

set up and adjustment.

• Enclosure approved for use in air plenums.

• Damper position feedback to the BACnet Building Automation System

(BAS) via integral hall effect sensor.

• Stable flow control down to 0.004 in. W.C. (0.996 Pa) differential

pressure.

Memory Available

Table–1.3 MNB-Vx Available Memory.

Model

Number

MNB-V1 MNB-V2

Flash SRAM SDRAM EEPROM FRAM

256 KB 8 KB n/a 4 KB n/a

Physical I/O Points

Table–1.4 MNB-Vx Inputs and Outputs.

Model

Number

Inputs and Outputs

UI UO DO (Triac)

MNB-V1 300 MNB-V2 313

Refer to the "Input and Output Specifications" on page 15 for a detailed discussion of each input or output type.

Time Clock

The

MNB-V1 and MNB-V2 controllers use a software clock. This software clock

defaults to a predefined Date/Time following a reset.

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 5

Chapter 1

UO1*

COM*

UI1

COM

UI2

UI3

S-LK/COM

S-LK

MSTP +

MSTP –

SHLD

SW24H1* (DO1)

SW24H2* (DO2)

SW24H3* (DO3)

24H

24G (COM)

GND

MSTP RCV

MSTP XMT

STATUS

Physical

Address

MSB

LSB

MNB-V1 / -V2

Controllers

MS/TP Jack

6 To detect an open switch, minimum resistance must be

greater than 2.5 kilohm.

7 Minimum rate of 1 pulse per 4 minutes. Maximum rate of

1 pulse per second.

8 When making an MS/TP cable, use a 1.3 x 3.5 mm Vdc

power plug with strain relief (Vimex part number SCP-2009A-T, Schneider-Electric part number E24-1442, or equivalent). The cable should be no longer than 6 ft. Connect MS+ to the center contact and MS– to the outside contact:

Note: The MS/TP cable described above is available from Schneider-Electric as MNB-CT-CBL. Contact Schneider-Electric for more information.

1 Fixed screw terminals that accept a single AWG #14

(2.08 mm

) wire or up to two AWG #18 (0.823 mm2) or

smaller wires. Do not exceed two AWG #24 (0.205 mm

)

wires per MS/TP wiring terminal.

2 Input signals of 1 to 11 Vdc must be converted to 0.45 to

5 Vdc with a voltage divider, part number AD-8961-220.

3 In applications requiring universal inputs with ranges of

0 to 20 mA, a 250 ohm shunt resistor kit, AD-8969-202, is needed.

4 An 11 kilohm shunt resistor kit, AD-8969-206, is

required for a 10 kilohm

Thermistor Sensor (non-850

series) universal inputs.

5 To detect a closed switch, maximum resistance must

be less than 300 ohm.

AC Power

20.4 to 30 Vac, 50/60 Hz Class 2 (EN 60742) 15 VA per controller plus DO load

Digital Outputs Total 24 VA (DO1+DO2), 12 VA (DO3) at 24 Vac, 50/60 Hz, Class 2. Pilot Duty

Universal Output 0 to 20mA into an 80 to 550

ohm

load

S-LK Supports one I/A Series MN-Sxxx Sensor

BACnet Network Communications

5 6

Universal Inputs

0 to 5 Vdc 0 to 20 mA 10K Thermistor 1K Balco 1K Platinum 1K Resistive 10K Resistive Digital (dry switched

contact)

Standard Pulse

Internal Triac Switches (3)

Note: Components are shown in

their approximate locations.

Note: Asterisks (*) indicate terminals

that apply to the MNB-V2 controller but not to the MNB-V1.

Figure–1.2 MNB-Vx Terminal Connections.

Wiring Terminals

Refer to Figure-1.2 for the power and network communications wiring connections available on the MNB-V1 and MNB-V2 controllers.

6 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

MNB-70 Zone Controllers

SW24H1

SW24H2

SW24H3

24H

24G(COM)

GND

STATUS

MSTP RCV MSTP XMT

UO 1

COM

UI 1

COM

UI 2 UI 3

S-LK/COM

MSTP +

MSTP -

SHLD

The I/A Series MicroNet BACnet Zone Controller, MNB-70, is an interoperable controller with native BACnet MS/TP communications support. The controller features: three universal inputs; one universal output; three digital (Triac) outputs; Sensor Link (S-Link) support; LED status indication; and screw terminal blocks.

When programmed using WP Tech, the MNB-70 provides a wide range of control strategies for heat pump, fan coil, unit ventilator, mixing boxes, and similar applications.

Unique Features

In addition to common MicroNet BACnet controller features ("Common

Controller Features" on page 2), the MNB-70 offers the following:

• I-Am button for BACnet “I-am” message broadcast.

• Integral MS/TP jack for direct connection of a PC with the WP Tech.

• Small footprint.

• Enclosure approved for use in air plenums.

Memory Available

Table–1.5 MNB-70 Available Memory.

Model

Number

MNB-70 256 KB 8 KB n/a 4 KB n/a

Flash SRAM SDRAM EEPROM FRAM

Physical I/O Points

Table–1.6 MNB-70 Inputs and Outputs.

Model

Number

Inputs and Outputs

UI UO DO (Triac)

MNB-70 313

Refer to the "Input and Output Specifications" on page 15 for a detailed discussion of each input or output type.

Time Clock

The

MNB-70 controller uses a software clock. This software clock defaults to a

predefined Date/Time following a reset.

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 7

Chapter 1

UO1

COM

UI1

COM

UI2

UI3

S-LK/COM

S-LK

MSTP +

MSTP –

SHLD

SW24H1 (DO1)

SW24H2 (DO2)

SW24H3 (DO3)

24H

24G (COM)

GND

MSTP RCV

MSTP XMT

STATUS

Physical Address

MSB

LSB

MNB-70

Controller

MS/TP Jack

IAM

1 Fixed screw terminals that accept a single AWG #14

(2.08 mm

) wire or up to two AWG #18 (0.823 mm2) or

smaller wires. Do not exceed two AWG #24 (0.205 mm

)

wires per MS/TP wiring terminal.

2 Input signals of 1 to 11 Vdc must be converted to 0.45 to

5 Vdc with a voltage divider, part number AD-8961-220.

3 In applications requiring universal inputs with ranges of

0 to 20 mA, a 250 ohm shunt resistor kit, AD-8969-202, is needed.

4 An 11

kil

ohm shunt resistor kit, AD-8969-206, is

required for a 10

kilohm

Thermistor Sensor (non-850

series) universal inputs.

5 To detect a closed switch, maximum resistance must

be less than 300 ohm.

AC Power

20.4 to 30 Vac, 50/60 Hz Class 2 (EN 60742) 15 VA per controller plus DO load

Digital Outputs Total 24 VA (DO1+DO2), 12 VA (DO3) at 24 Vac, 50/60 Hz, Class 2. Pilot Duty

Universal Output 0 to 20mA into an 80 to 550

ohm

load

S-LK Supports one I/A Series MN-Sxxx Sensor

BACnet Network Communications

5 6

Universal Inputs

0 to 5 Vdc 0 to 20 mA 10K Thermistor 1K Balco 1K Platinum 1K Resistive 10K Resistive Digital (dry switched

contact)

Standard Pulse

Internal Triac Switches (3)

6 To detect an open switch, minimum resistance must be

greater than 2.5

kilo

hm.

7 Minimum rate of 1 pulse per 4 minutes. Maximum rate of

1 pulse per second.

8 When making an MS/TP cable, use a 1.3 x 3.5 mm Vdc

Note: The MS/TP cable described above is available from Schneider-Electric as MNB-CT-CBL. Contact Schneider-Electric for more information.

Note: Components are shown in

their approximate locations.

Figure–1.3 MNB-70 Terminal Connections.

Wiring Terminals

Refer to Figure-1.3 for the power and network communications wiring connections available on the MNB-70 controller.

8 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

MNB-1000 Plant Controller

The I/A Series MicroNet BACnet Plant Controller, MNB-1000, is an interoperable controller with native BACnet MS/TP communications support. The controller features Sensor Link (S-Link) support, LED status and output indication, two Ethernet ports, and screw terminal blocks.

The MNB-1000’s sequence of operation and BACnet image are fully programmable using WP Tech, and can be applied to a wide range of mechanical equipment. Typical applications include central station air handlers, VAV air handlers, and cooling towers.

Unique Features

In addition to common MicroNet BACnet controller features ("Common

Controller Features" on page 2), the MNB-1000 offers the following:

• Optional NEMA 1 enclosure.

• IAM button for BACnet “I am” message broadcast.

• Integral MS/TP jack for direct connection of a PC with the WP Tech.

• LED indication of Ethernet communication link and activity, DO state,

UO state, and remote I/O communications.

• Application-programmable LED provides on/off indication of a

user-defined application parameter.

• BACnet router functionality.

• Support for remote I/O modules.

• Etherne t po rt bridgin g.

• 20 Vdc output

• 72 hour, battery-backed real time clock.

Memory Available

Table–1.7 MNB-1000 Available Memory.

Component Flash SRAM SDRAM EEPROM FRAM

µC 128 KB 4 KB n/a 4KB n/a

Motherboard n/a 256 KB n/a 128 KB n/a Engine (Core) 32 or 16 MB Engine (Boot) 2 MB n/a n/a n/a n/a

a. MNB-1000s with a date code prior to 0726 have 32 MB of core memory. Beginning with

date code 0726, core memory was changed to 16 MB. However, because the MNB-1000 has always used only the first 16 MB of memory, this change has no impact on the controller’s operation, the size of the application allowed, or the controller’s application compatibility.

Physical I/O Points

Table–1.8 MNB-1000 Inputs and Outputs.

Model

MNB-1000 12488

Refer to the "Input and Output Specifications" on page 15 for a detailed discussion of each input or output type.

n/a 64 MB 1 Kb n/a

Inputs and Outputs

UI DI UO DO (Triac)

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 9

Chapter 1

Note: The onboard I/O points of the MNB-1000 can be greatly expanded

with the addition of one to eight MNB-1000-15 remote I/O modules, each of which adds 15 I/O points. Refer to "MNB-1000-15 Remote I/O Module" on

page 13.

Time Clock

The MNB-1000 features an onboard, real-time clock. A lithium battery provides backup power for up to 72 hours in the event of a primary power interruption. The real-time clock acts as a Date/Time server using native BACnet services. In the absence of another Date/Time server on the network, the MNB-1000 can provide this functionality to other nodes on the BACnet internetwork.

Battery Replacement

If the real-time clock’s battery becomes depleted, replace it with lithi um battery, part number E17-137, according to the instructions in Figure-1.4. For additional disassembly and reassembly instructions, refer to MicroNet BACnet MNB-1000 Plant Controller Installation Instructions, F-27347

Caution: Follow static discharge precautions when hand ling the MNB-1000 and its component parts.

Note: Whenever the battery is removed from the MNB-1000, the clock setting and volatile data will be lost. Reprogram the MNB-1000 as needed after installing the replacement battery.

10 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

Printed Circuit Board

Cover

Base Plate

Printed Circuit

Board

Screw

(1 of 2)

Lithium Battery

E17-137

1 If the controller is mounted inside an

enclosure, open the enclosure cover.

2 Remove power from the

controller.

3 Referring to MicroNet BACnet

MNB-1000 Controller Installation Instructions, F-27347, remove

the controller’s main assembly from the base plate.

4 Remove two screws, and then

separate the printed circuit board from the cover.

5 Locate the battery on the printed

circuit board.

6 Remove the depleted battery,

and then install a new lithium battery, part number E17-137. Make sure that the positive (+) side faces upward.

7 Reassemble the printed

circuit board to the cover, and secure with the two screws removed in step 4.

8 Referring to F-27347,

reassemble the controller’s main assembly to the base plate.

9 Restore power to the controller.

10 If applicable, close the enclosure

cover.

Figure–1.4 MNB-1000 Real-time Clock Battery Replacement.

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 11

Chapter 1

Figure–1.5 MNB-1000 Terminal Connections.

Wiring Terminals

Refer to Figure-1.5 for the wiring connections available on the MNB-1000 controller.

20 Vdc Output

±10% at

20 Vdc 100 mA

Universal Inputs

0 to 5 Vdc 0 to 20 mA

5 10K Thermistor 1K Balco 1K Platinum 1K Resistive 10K Resistive Digital (dry switched contact)

Digital Inputs Dry Switched Contact Fast Pulse

Local Display (for future use)

S-LK Supports one I/A Series MN-Sxxx Sensor

ADI or Remote I/O

BACnet Network Communications

1 I/O point wiring terminals

accept a single AWG #14 (2.08 mm

) or up to two

AWG #18 (0.823 mm2) or

20V

UI1

COM

UI2

UI3

COM

UI4

UI5

COM

UI6

UI7

COM

UI8

UI9

COM

UI10

UI11

COM

UI12

DI1

COM

DI2

DI3

COM

DI4

COM

S-LK

IO+

IO-

SLD

MS+

MS-

SLD

Note: Components are

Disable Enable

I AM

MS/TP Jack

shown in their approximate locations.

0 PORT

IO EOL MS BIAS MS EOL MS BIAS

ACT LNK

1 PORT

Physical Address

Plant Controller

smaller wires. Do not exceed two AWG #24 (0.205 mm

) wires per MS/TP or Remote I/O wiring terminal.

2 Power wiring terminals accept up to two AWG #14

(2.08 mm

) or smaller wires.

3 Power, MS/TP, and Remote I/O connectors have

removable screw terminals.

4 Input signals of 1 to 11 Vdc must be converted to 0.45 to

5 Vdc with a voltage divider, part number AD-8961-220.

5 In applications requiring universal inputs with ranges of 0 to

20 mA, a 250

ohm

shunt resistor kit, AD8969-202, is

needed.

6 An 11 kil

for a 10 kil

ohm

shunt resistor kit, AD-8969-206, is required

ohm

thermistor Sensor (non-850 series)

universal inputs.

MNB-1000

Internal Triac

Switches (8)

(Isolated)

TO (DO) LEDs (8)

24H

24G COM

GND

TO1 (DO1)

TO2 (DO2)

TO3 (DO3)

TO4 (DO4)

TO5 (DO5)

TO6 (DO6)

TO7 (DO7)

TO8 (DO8)

2 3

AC Power

20.4 to 30 Vac 50/60 Hz Class 2 (EN 60742) 50 VA per controller Isolated from I/O

Digital Outputs 12 VA at 24 Vac, 50/60 Hz each Triac output individually isolated from AC input and other I/O.

Universal Outputs 0 to 20 mA into an 80 to 550 ohm load.

7 To detect a closed

switch, maximum resistance must be less than 300

8 Remote I/O network

bias resistor is built-in.

minimum resistance must be greater than 2.5 kil

ETHERNET

LSB

UO LEDs (8)

RCV

XMT

MSTP

STATUS AUX

UO1

COM

UO2

UO3

COM

UO4

UO5

COM

UO6

UO7

COM

UO8

9 To detect an open switch,

10 To detect an open switch,

minimum resistance must be equal to or greater than

2.5 kil

MSB

ohm

11 External load is required to

illuminate UO LEDs.

12 Minimum rate of 1 pulse per 4 minutes. Maximum rate of 10 pulses

per second. With digital inputs only.

13 When making an MS/TP cable, use a 1.3 x 3.5 mm Vdc power

plug with strain relief (Vimex part number SCP-2009A-T, Schneider-Electric part number E24-1442, or equivalent). The cable should be no longer than 6 ft. Connect MS+ to the center contact and MS– to the outside contact:

–

Note: The MS/TP cable described above is available from Schneider-Electric as MNB-CT-CBL. Contact

Schneider-Electric for more information.

ohm

12 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

MNB-1000-15 Remote I/O Module

The I/A Series MicroNet BACnet Remote I/O Module, MNB-1000-15, is designed to be connected to an MNB-1000 Plant Controller, so as to expand the controller’s I/O count. When programmed using WP Tech, each module increases the count by 15 inputs and outputs. Up to ei ght modules can be connected to a given MNB-1000, for a potential increase of 120 I/O points, total. In this way, the controller’s existing 32 onboard I/O can be e xpanded to 47 I/O points (with one module), up to a maximum total of 152 I/O points (with eight modules).

Features

The MNB-1000-15 offers the following:

• 24 Vac powered.

• DIP switch for setting the physical address on the remote I/O network.

• Isolated EIA-485 (formerly RS-485) transceiver for remote I/O

communications.

• Removable electronics module that mates with panel-mounted subbase.

• Optional NEMA 1 enclosure.

• Removable terminals for power and communications, to facilitate

commissioning.

• LED indication of compatibility, UO and TO state, and communication

state (with the MNB-1000).

• Firmware upgradeable over the network.

• Fallback function, in case of loss of communication with MNB-1000.

Note: The MNB-1000-15 does not support the S-Link bus.

Memory Available

Table–1.9 MNB-1000-15 Available Memory.

Model

Number

MNB-1000-15 256KB 8KB n/a 4KB 8KB

Physical I/O Points

T able–1.10 MNB-1000-15 Inputs and Outputs.

Model

Number

MNB-1000-15 636

Refer to "Input and Output Spe cifications" on page 15 for a detailed discussion of each input or output type.

Fallback Function

The MNB-1000-15 module’s outputs are driven directly by the MNB-1000 Plant Controller, in which the application resides. If communications between the module and the MNB-1000 is lost, the module’s output s are set to fallback values that were previously sent to the module during normal communications. Refer to "Fallback Function" on page 107 for more information on this function.

Flash SRAM SDRAM EEPROM FRAM

Inputs and Outputs

UI UO DO (Triac)

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 13

Chapter 1

EOL

Enable

Disable

TO1 (DO1)

TO2 (DO2)

TO3 (DO3)

TO4 (DO4)

TO5 (DO5)

TO6 (DO6)

UI1

COM

UI2

UI3

COM

UI4

UI5

COM

UI6

UO1

COM

UO2

UO3

COM

S-LK

IO+

SLD

MSB

LSB

MNB-1000-15

Remote I/O Module

24H

24G COM

GND

XMT

RCV

STATUS

Physical Address

Universal Inputs

0 to 5 Vdc 0 to 20 mA 10K Thermistor 1K Balco 1K Platinum 1K Resistive 10K Resistive Digital (dry switched

contact)

Standard Pulse (UI1-UI6)

Universal Outputs 0 to 20 mA into an 80 to 550 ohm load

Remote I/O Network Communications to MNB-1000

AC Power

20.4 to 30 Vac 50/60 Hz Class 2 (EN 60742) 16 VA per module

Digital Outputs (Triac)

12 VA at 24 Vac, 50/60 Hz. Each Triac output individually isolated from AC input and other I/O. Class 2

7 8

2 3

1 Do not exceed two AWG #24

(0.205 mm

) wires per Remote I/O

wiring terminal.

2 Power and I/O point wiring

terminals accept up to two AWG #14 (2.08 mm

) or smaller wires.

3 Power and remote I/O connectors

have removable screw terminals

4 Input signals of 1 to 11 Vdc must

be converted to 0.45 to 5 Vdc with a voltage divider, part number AD-8961-220.

5 In applications requiring universal inputs

with ranges of 0 to 20 mA, a 250 ohm shunt resistor kit, part number AD-8969-202, is needed.

6 An 11

kil

ohm shunt resistor kit, part number AD-8969-206, is required for a 10

kil

ohm Thermistor Sensor (non-850

series) universal inputs.

7 To detect a closed switch, resistance must

be less than 300

ohm

8 To detect an open switch, resistance must

be greater than 2.5 kil

ohm

9 External load is not required to

illuminate UO LEDs.

10 Minimum rate of 1 pulse per 4 minutes.

Maximum rate of 1 pulse per second.

11 Items in gray, although present, are not

used in the MNB-1000-15.

12 Bias for the remote I/O network is

provided by the built-in bias resistor on the MNB -1000 controller.

TO (DO) LEDs (6)

UO LEDs (3)

Internal

Triac

Switches

(Isolated)

Connectors (2)

11 12

Note: Components are shown

in their approximate locations.

Figure–1.6 MNB-1000-15 Terminal Connections.

Wiring Terminals

Refer to Figure-1.6 for the power and network communications wiring connections available on the MNB-1000-15 remote I/O module.

14 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

I/A Series BACnet Hardware

UI1

COM

UI2

Controller

UI1

COM

UI2

+ _

250 ohm

UI1

COM

UI2

10 kilohm Thermistor

(with an 11 kilohm

shunt resistor)

4 to 20 mA

Transmitter

0 to 5 Vdc

Transmitter

Controller

Inputs

Controller

Inputs

Sensor Power

Source

Sensor Power

Source

1 Resistor kit, AD-8969-202. Be

sure to install the resistor at the controller, not at the 4 to 20 mA device.

Figure–1.7 Universal Input Connections.

Input and Output Specifications

All MicroNet BACnet controllers use input and output types as described in this section.

Universal Inputs

The universal input characteristics are software-configured to respond to one of the eight input types listed in Table–1.11.

Table–1.11 Universal Inputs.

Input Characteristics

10 kilohm Thermistor with 11 kilohm Shunt Resistor

1kilohm Balco

1 kilohm Platinum 1 kilohm Resistive 0 to 1500 ohm.

10 kilohm Resistive 0 to 10.5 kilohm. Analog Voltage Range 0 to 5 Vdc

Analog Current

Digital

Sensor operating range -40 to 250 °F (-40 to 121 ° C), requires Schneider Electric model TSMN-57011-850 series, TS-5700-850 series, or equivalent.

-40 to 250 °F (-40 to 121 °C), Schneider Electric model TSMN-81011, TS-8000 series, or equivalent.

-40 to 240 °F (-40 to 116 °C), Schneider Electric model TSMN-58011, TS-5800 series, or equivalent.

0 to 20 mA, requires external 250 ohm shunt resistor kit, AD-8969-202.

Dry switched contact; detection of closed switch requires less than 300 ohm resistance; detection of open switch requires more than 2.5 kilohm.

See Figure-1.7 for examples of connections to universal inputs.

F-27360-11 MicroNet BACnet Wiring, Networking, and Best Practices Guide 15

Chapter 1

UO1

COM

UO2

+ _

500 ohm

Controller

Outputs

+ _

UO1

COM

UO2

1 Output accuracy degrades as input

impedance decreases.

2 Resistor kit, AM-708. Be sure to

install the resistor at the 0 to 10 Vdc

device, not at the controller.

3 Can be purchased through PS3,

part number FUN-RIBU1-C.

Controller

Outputs

4 to 20 mA

Actuator

Controller Output

Configured as

0 to 20 mA

Functional Devices

RIBU1C Relay

0 to 10 Vdc

Actuator

N/C

COM

N/O

Wht/Blu 10-30 Vdc

Wht/Yel COM

UO1

COM

Figure–1.8 Universal Output Connections.

Figure–1.9 Fixed Digital Input Connections.

Universal Outputs

0 to 20 mA (output load from 80 to 550 ohm). See Figure-1.8 for examples of connections to universal outputs.

Digital Inputs

Dry switched contact. Detection of a closed switch requires less than 300 ohm resistance. When connected to a controller’s digital inputs, detection of an open switch requires more than 2.5 kilohm. When connected to a controller’s universal inputs (used as digit al inputs), d etection of an open switch requires more than 2.5 kilohm. See Figure-1.9 for examples of a connection to digital inputs.

Connection to Digital Inputs Connection to Universal Inputs

DI Input

On-Off Type Device

COM

Controller

Inputs

DI1

COM

DI2

DI Input

On-Off Type Device

COM

Controlle

Inputs

UI1

COM

UI2

16 MicroNet BACnet Wiring, Networking, and Best Practices Guide F-27360-11

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