Installing the UC Open
UC Open
CARRIER CORPORATION ©2019
Installation and Start-up Guide
All rights reserved
7
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...
Set Communications
Selection jumper to...
Set DIP switches 1 and 2 to...
Set DIP switches 3 and 4 to...
MS/TP
BACnet MS/TP
The appropriate baud rate. See the
MS/TP Baud
diagram on the
controller.
Off/Off
ARC156
BACnet ARC156
N/A. Baud rate will be 156 kbps
regardless of the DIP switch
settings.
Off/Off
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.
