Wiring For Third Party Protocols; To Wire Modbus Devices On Port S2 - Carrier OPN-OPT-OL Installation And Startup Manual

Wiring for third party protocols

Wiring for third party protocols
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
Port S2
Port E1

To wire Modbus devices on Port S2

Turn off the controller's power.
1
Check the communications wiring for shorts and grounds.
2
Set the Router Config Mode DIP switch Console to Off (down position).
3
Wire the controller's Port S2 to the third-party device, then set the S2 jumper. See table and notes below.
4
Turn on the controller's power.
5
For...
EIA-232
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.
Chilled Water System Optimizer v2
Installation and Start-up Guide
Protocol(s)
Modbus RTU or ASCII, master or slave
All or any combination of the following:

BACnet/IP

Modbus/IP
Use controller port... Wire Carrier
terminal...
S2 TX
Rx
Signal Ground
S2 Net+
Net-
...to third-party
device terminal
Rx
Tx
Gnd
+
-
16
Set the port's jumper(s)
on controller
EIA-232
EIA-485
2-wire
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