Carrier ChillerVu - Ethernet, Bacnet MS;TP, ARC156, and CCN Wiring Specifications; To Wire the Controller to the Bacnet MS;TP or ARC156 Network

Wiring for communications
Carrier® ChillerVu™
(OPN-PSM-MPCXPE) Carrier Proprietary and Confidential CARRIER CORPORATION ©2017
Installation and Start-up Guide 23 All rights reserved
Ethernet, BACnet MS/TP, ARC156, and CCN wiring specifications
For...
Use...
Maximum Length
Ethernet CAT5e or higher Ethernet cable 328 feet (100 meters)
BACnet
MS/TP*
BACnet
ARC156*
22 or 24 AWG, low-capacitance, twisted,
stranded, shielded copper wire
2000 feet (610 meters)
CCN
• 3-conductor
• 18 or 20 AWG stranded tinned copper wire
• Polyethylene insulation, PVC jacket
• Shielded with a drain wire
• Belden wire P#8772 or similar
NOTE
Must meet the above requirements
1000 feet (305 meters)
*
For details see the Open Controller Network Wiring Guide.
WARNING
Do not apply line voltage (mains voltage) to the controller's ports and terminals.
To wire the controller to the BACnet MS/TP or ARC156 network
1 Pull the screw terminal connector from the controller's power terminals labeled
24 Vac/26 Vdc
and
Return
(Ground).
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 BACnet Mode jumper to...
Set the baud rate...
MS/TP
BACnet MS/TP
See To set a port's baud rate using PuTTY.
ARC156
BACnet ARC156
N/A. Baud rate is automatically set to 156 kbps.
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 Install a BT485 on the first and last controller on a network segment to add bias and prevent signal
distortions due to echoing.