Wiring for third party protocols
Chilled Water System Optimizer v2
CARRIER CORPORATION ©2019
Installation and Start-up Guide
16
All rights reserved
You can connect third party protocols after you set up BACnet. The driver for the controller allows access to the
following third party protocols. Additional drivers are not required.
You can use this combination of protocols or a subset of them:
Port
Protocol(s)
Port S2
Modbus RTU or ASCII, master or slave
Port E1
All or any combination of the following:
BACnet/IP
Modbus/IP
To wire Modbus devices on Port S2
1
Turn off the controller's power.
2
Check the communications wiring for shorts and grounds.
3
Set the
Router Config Mode
DIP switch
Console
to
Off
(down position).
4
Wire the controller's Port S2 to the third-party device, then set the S2 jumper. See table and notes below.
5
Turn on the controller's power.
For...
Use controller port...
Wire Carrier
terminal...
...to third-party
device terminal
Set the port's jumper(s)
on controller
EIA-232
S2
TX
Rx
Signal Ground
Rx
Tx
Gnd
EIA-232
EIA-485,
2-wire
S2
Net+
Net-
+
-
EIA-485
2-wire
NOTES
If you cannot determine the media type or connections of the third-party device, contact your third-party
representative.
Use the same polarity throughout the network segment.
Repeaters are required for more than 31 devices. See your third-party device manufacturer's
recommendations.
Wiring for third party protocols
