Bacnet Arc156; To Set Up The Unit Vent For Bacnet Arc156 - United Technologies Carrier Unit Vent Open Integration Manual

Communications wiring

BACnet ARC156

To set up the Unit Vent for BACnet ARC156

Turn off the power for the Unit Vent by disconnecting power terminals.
1
Using the rotary switches, set a unique address. Set the Tens (10's) switch to the tens digit of the address,
2
and set the Ones (1's) switch to the ones digit.
EXAMPLE If the controller's address is 25, point the arrow on the Tens (10's) switch to 2 and the arrow on
the Ones (1's) switch to 5.
0
10's
0
1's
NOTE The Unit Vent recognizes its address only after power has been cycled.
Set communications selector for BACnet ARC156.
3
Set the both DIP switches 3 and 4 OFF for BACnet ARC156.
4
NOTE The baud rate for BACnet ARC156 is automatically 156 kbps, so DIP switches 1 and 2 are overridden.
Connect the communications wiring to the Comm port in the screw terminals labeled Net +, Net -, and Shield.
5
Wire specifications
A dedicated 22 AWG shielded twisted pair wire (EIA 485)
○
Maximum wire length 2000 feet (610 meters) or 32 nodes
○
Devices should be daisy-chained and not star-wired
○
Attach the drain/shield wire to both ends of the network segment and through every controller
○
NOTE Use the same polarity throughout the network segment.
Turn on the power for the Unit Vent by connecting power terminals.
6
Unit Ventilator
Integration Guide
8
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