Wiring Specifications For Bacnet Ms/Tp And Arc156; To Wire The Controller To The Network - Carrier UC Open XP Installation And Startup Manual

Installing the UC Open XP

Wiring specifications for BACnet MS/TP and ARC156

Cable:
Maximum length:
WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.

To wire the controller to the network

1
Pull the screw terminal connector from the controller's power terminals labeled Gnd and 24 Vac.
2
Check the communications wiring for shorts and grounds.
3
Connect the communications wiring to the BACnet MS/TP or to the BACnet ARC156 port.
NOTE Use the same polarity throughout the network segment.
4
For MS/TP, verify the jumpers are set to 485-2w and EIA-485. They are not used for ARC156.
5
Set the communication type and baud rate.
For...
MS/TP
ARC156
NOTE Use the same baud rate for all controllers on the network segment.
6
Wire the controllers on an MS/TP or ARC156 network segment in a daisy-chain configuration.
7
If the UC Open XP is at either end of a network segment, connect a BT485 to the UC Open XP.
8
Insert the power screw terminal connector into the UC Open XP's power terminals.
9
Verify communication with the network by viewing a Module Status report in the i-Vu® interface.
UC Open XP and
UC Open XP IO
Installation and Start-up Guide
22 AWG or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire
2000 feet (610 meters)
Set Communications
Selection jumper to...
MS/TP
ARC156
Carrier Proprietary and Confidential
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.
8
Set DIP switches 3 and 4
to...
Off/Off
On/On
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