TAC I/A Series
MicroNet BACnet VAV Controllers
MicroNet BACnet VAV Controllers MNB-Vx
The TAC I/A Series™ MicroNet™ BACnet™
VAV (Variable Air Volume) Controllers are
interoperable controllers with native BACnet MS/TP
communications support. All models incorporate: an
integral actuator with manual override; an integral,
patented, pressure transducer; three universal inputs;
Sensor Link (S-Link) support; LED status indication;
and over-the-shaft damper mounting. See the model
chart for optional features.
When programmed using WorkPlace Tech Tool, the
controllers provide a wide range of control strategies
for pressure-dependent and pressure-independent
terminal boxes with or without reheat capabilities.
The MicroNet BACnet VAV controllers can function
SPECIFICATIONS
HARDWARE
Dimensions
7-3/4 H x 6-1/4 W x 2-1/2 D in (197 x 159 x 63 mm).
Enclosure
Cover meets UL 94-5VA flammability ratings for
plenum application use.
Optional enclosure for conduit applications, conforms
to NEMA-1.
Mounting
Shaft mount.
Power Supply Input
20.4 to 30 Vac, 50/60 Hz.
Power Consumption
15 VA at 24 Vac plus DO loads.
AGENCY LISTINGS
US
FCC Part 15, Class A.
UL 916, File #E71385 Category PAZX
UL 864, Category UUKL, File #S5381 Smoke-Control
Equipment
Canadian
UL Listed to Canadian Safety Standards (CAN/CSA
22.2).
CUL Listed to Standards
ULC/ORD-C100-92 (Smoke Control System
Equipment) and CAN-ULC-S527 (Control Units for
Fire Alarm Systems)
Australian
Meets requirements to bear the C-Tick Mark.
BTL Listed
B-ASC
European Community
EMC Directive 89/336/EEC, EN61326
either in a standalone mode or as part of a BACnet
building automation system (BAS) network.
AMBIENT LIMITS
Operating Temperature
32 to 131 °F (0 to 55 °C).
Shipping and Storage Temperature
-40 to 160 °F (-40 to 71 °C).
Humidity
5 to 95% non-condensing.
WIRING TERMINALS)
Fixed Screw Terminals
Single AWG #14 (2.08 mm
#18 (0.823 mm
VELOCITY PRESSURE INPUT
Control Range
0.004 to 1.5 in. of W.C.
Over Pressure Withstand
±20 in. of W.C.
Accuracy
±5% at 1.00 in. of W.C. with laminar flow at 77 °F (25
°C) and suitable flow station.
Sensor Type
Self-calibrating flow sensor (differential pressure).
Tubing Connections
Barb fittings for 0.170 in. I.D. FRPE polyethylene
tubing or 1/4” O.D./0.125” I.D. Tygon® tubing (high
and low pressure taps).
Continued on next page.
2
) or smaller wires.
2
) wire or up to two AWG
1
TAC I/A Series
MNB-Vx Controllers
2
Continued from first page.
Tubing Length
5 ft. (1.52 m) maximum, each tube.
INPUTS FROM MN-SX MICRONET SENSOR
Space Temperature
32 to 122 °F (0 to 50 °C).
Space Humidity
5 to 95% RH, non-condensing.
Local Setpoint
Adjustable within limits set by application
programming tool.
Override Pushbutton
For standalone occupancy control or occupancy
override.
Fan Operation and Speed Mode
On/off, speed (low/medium/high), or auto.
System Mode
Heat, cool, off, or auto.
Emergency Heat
Enable or disable.
UNIVERSAL INPUTS (3)
Universal Input characteristics are softwareconfigured to respond to one of the following input
types:
10 k ohm Thermistor with 11 k ohm Shunt
Resistor
Sensor operating range -40 to 250 °F (-40 to
121 °C), model TSMN-57011-850, TS-5700-850
series, or equivalent.
1 k ohm Balco
-40 to 250 °F (-40 to 121 °C), model TSMN-81011,
TS-8000 series, or equivalent.
1 k ohm Platinum
-40 to 240 °F (-40 to 116 °C), model TSMN-58011,
TS-5800 series, or equivalent.
1 k ohm Resistive
0 to 1500 ohms.
10 k ohm Resistive
0 to 10.5 k ohms.
Analog Voltage
Range 0 to 5 Vdc.
Analog Current
Range 0 to 20 mA, requires external 250 ohm shunt
resistor (AD-8969-202).
Digital
Dry switched contact; detection of closed switch
requires less than 300 ohms resistance; detection of
open switch requires more than 2.5 k ohms.
Standard Pulse Input
Minimum Rate
1 pulse per 4 minutes.
Maximum Rate
1 pulse per second.
ACTUATOR OUTPUTS
Torque Rating
53 lb-in. (6 N-m).
Stroke
Fully adjustable from 0° to 90°.
Timing
Approximately 3 minutes at 60 Hz (3.6 minutes at
50 Hz) for 90° rotation at 24 Vac.
Position Indication
Provides a visual indication of position.
Manual Override
Pushbutton to allow manual positioning of the
damper.
Damper Linkage
1/2 in. (12.75 mm) or 3/8 in. (9.5 mm) diameter round
shaft extending 7/8 in. (22.23 mm) minimum from
terminal box. 3/8 in. (9.5 mm) diameter shaft requires
AM-135 adapter kit.
DIGITAL OUTPUTS – TRIAC
DO1 plus DO2 Rating
24 VA total at 24 Vac, 50/60 Hz, high side switching.
DO3 Rating
12 VA at 24 Vac, 50/60 Hz, high side switching.
UNIVERSAL OUTPUT
0 to 20 mA
Output load from 80 to 550 ohms.
0 to 10 V
With external 500 ohms, 1/2 W, 1% resistor.
Capable of Driving Functional Devices RIBUI1C
Relay
UO configured for 0 to 20 mAdc, no external resistor.
MODELS
Part Number Description
MNB-V1 Cooling only 3 — —
MNB-V2 Deluxe 3 1 3
Schneider Electric
F-27340-4
Inputs and Outputs
UI UO DO (Triac)
© 2009 Schneider Electric. All rights reserved.
September 200 9 tl
TAC I/A Series
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
MNB-V1 / -V2
Controllers
MS/TP Jack
Internal Triac
Switches (3)
* Asterisks indicate terminals that apply to the
MNB-V2 controller but not to the MNB-V1.
MNB-Vx Controllers
FEATURES
The MicroNet BACnet VAV controllers’ sequence•
of operation and BACnet image are fully
programmable using WorkPlace Tech Tool. The
controllers can be applied to all common VAV
configuration and reheat control strategies.
Capability to function in standalone mode or as•
part of a BACnet building automation network.
Air balancing performed via BACnet, using VAV•
Flow Balance software, through direct connection
or over the network.
Integral MS/TP jack for direct connection of PC•
with WorkPlace Tech Tool and Flow Balance tool.
Integrated packaging with actuator, pressure•
transducer, and controller.
Integral actuator features manual override and•
travel limit stops for easy set up and adjustment.
Optional plenum-rated enclosure for use if wiring•
to flexible conduit is required.
MS/TP DIP switch addressable.•
Isolated EIA-485 (formerly RS-485) transceiver for•
MS/TP communications.
3
MS/TP baud rate selection from 9.6 up to 76.8•
kbaud.
LED indication of MS/TP communication activity•
and controller status.
Firmware upgradeable over the network.•
Support for S-Link Sensor.•
Damper position feedback to the BACnet BAS via•
integral hall effect sensor.
Stable flow control down to 0.004 in. W.C.•
differential pressure.
Provides flow balancing for networked and•
standalone VAV controllers. Features include:
Local network control. –
Damper and fan adjustment. –
Setpoint monitoring and adjustment. –
Flow validation and calibration (1, 2, or 3 point –
calibration).
Sequence, calibration, and control setpoint –
logs.
COMMUNICATIONS
BACnet Networks
The MicroNet BACnet VAV controllers incorporate
an isolated EIA-485 (formerly RS-485) transceiver for
BACnet MS/TP communications at 9.6 up to 76.8
kbaud using standard MS/TP wiring methods. Up to
128 MicroNet BACnet controllers can be connected
to an MS/TP sub-net without repeaters.
S-Link
The Sensor Link (S-Link) communications wiring
provides power and a communication interface
for one MN-Sx TAC I/A Series MicroNet sensor.
The various MN-Sx sensors can provide room
temperature, room humidity, setpoint adjustment,
and occupancy override. This connection uses twowire, unshielded cable and is not polarity sensitive.
Maximum S-Link bus length is 200 ft (61 m).
BACn e t COMPLIANCE
BACnet Application Specific Controller (B-ASC).
OPTIONS
MNA-FLO-1
MicroNet Enclosure, used if wiring to flexible conduit
is required
S-Link Sensors
Temperature and Humidity Wall Sensors with Digital
Communication
TSMN Series
Room Temperature Sensors
Schneider Electric
F-27340-4
BACnet is a registered trademark of
ASHRAE. ASHRAE does not endorse,
approve, or test products for
compliance with ASHRAE standards.
Compliance of listed products to the
requirements of ASHRAE Standard 135 is the
responsibility of BACnet International (BI). BTL is a
registered trademark of BI.
VAV CONTROLLER TERMINALS
© 2009 Schneider Electric. All rights reserved.
September 200 9 tl
TAC I/A Series
Network
Controller
One to Eight
TMicroNet BACnet
MNB-1000-15
Remote I/O Modules
Remote I/O Trunk
S-Link
Sensor
MicroNet BACnet
MNB-1000
Plant Controller
BACnet MS/TP Communications Bus
S-Link
Sensor
MicroNet BACnet
MNB-300
Unitary Controller
S-Link
Sensor
MicroNet BACnet
MNB-300
Unitary Controller
S-Link
Sensor
MicroNet BACnet
MNB-70
Zone Controller
S-Link
Sensor
MicroNet BACnet
MNB-V1 or V2
VAV Controller
S-Link
Sensor
MicroNet BACnet
MNB-V1 or V2
VAV Controller
MicroNet BACnet
MNB-1000
Plant Controller
BACnet MS/TP Communications Bus
PC Workstation
with WorkPlace
Tech Tool
Software Suite
PC Workstation
with WorkPlace
Tech Tool
Software Suite
S-Link
Sensor
MicroNet BACnet
MNB-300
Unitary Controller
S-Link
Sensor
MicroNet BACnet
MNB-70
Zone Controller
S-Link
Sensor
MicroNet BACnet
MNB-V1
Cooling Controller
S-Link
Sensor
MicroNet BACnet
MNB-V2
Deluxe Controller
Ethernet TCP/IP and BACnet/IP
Remote I/O
Module
Remote I/O
Module
Remote I/O
Module
MNB-Vx Controllers
TAC I/A SERIES BACNET TOPOLOGY
4
On October 1st, 2009, TAC became the Buildings Business of its parent company Schneider Electric. This document reflects the visual identit y of Schneider Electric, however 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. Infor mation contained within this document is subject to change without notice.
All rights reserved.
Schneider Electric
F-27340-4 September 200 9 tl
© 2009 Schneider Electric. All rights reserved.
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