Carrier WSHP Open v3 Integration Manual page 18

Communications wiring
Set the SW3 DIP switches 1 and 2 for the appropriate communications speed (9600, 19.2k, 38.4k, or 76.8k
3
bps).
NOTE Use the same baud rate and communication settings for all controllers on the network segment. The
WSHP Open is fixed at 8 data bits, No Parity, and 1 Stop bit for this protocol's communications.
Baud DIP switch settings
Baud rate
9,600 bps
19.2 kbps
38.4 kbps
76.8 kbps
Set the remaining DIP switches as follows:
4
Modbus DIP switch settings
8
Off
The following example shows the DIP switches set for 9600 baud and Modbus.
Connect the Modbus EIA-485 network to the WSHP Open's J19 Network Comm port. Connect to Net+, Net-,
5
and SHLD.
Wire specifications
A dedicated 22 AWG shielded twisted pair wire (EIA 485)
○
Maximum wire length 2000 feet (610 meters) or 32 nodes
○
Devices should be daisy-chained and not star-wired
○
Attach the drain/shield wire to both ends of the network segment and through every controller
○
NOTE Use the same polarity throughout the network segment.
Turn on the WSHP Open's power.
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WSHP Open v3
Integration Guide
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