To Wire The Controller To The Bacnet Network; Wiring Inputs And Outputs - Carrier UC Open Installation And Startup Manual

To wire the controller to the BACnet network

1
Pull the screw terminal connector from the UC Open's power terminals labeled 24 Vac and Gnd (Return).
2
Check the communications wiring for shorts and grounds.
3
Connect the communications wiring to the controller's screw terminals labeled Net +, Net -, and Shield.
NOTE Use the same polarity throughout the network segment.
4
Set the communication type and baud rate.
For...
MS/TP
ARC156
NOTE Use the same baud rate for all controllers on the network segment.
5
Wire the controllers on a BACnet MS/TP or BACnet ARC156 network segment in a daisy-chain configuration.
6
If the UC Open is at either end of a network segment, connect a BT485 to the UC Open.
7
Insert the power screw terminal connector into the UC Open's power terminals.
8
Verify communication with the network by viewing a Module Status report in the i-Vu® interface.

Wiring inputs and outputs

WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.
See Appendix A (page 23) to print a blank wire list.
UC Open
Installation and Start-up Guide
Set Communications
Selection jumper to...
BACnet MS/TP
BACnet ARC156
Set DIP switches 1 and 2 to...
The appropriate baud rate. See the
MS/TP Baud diagram on the
controller.
N/A. Baud rate will be 156 kbps
regardless of the DIP switch
settings.
7
Installing the UC Open
Set DIP switches 3 and 4 to...
Off/Off
Off/Off
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