Carrier WSHP Open v3 Integration Manual page 12

Communications wiring
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:
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BACnet MS/TP DIP switch settings
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The following example shows the DIP switches set for 76.8k (Carrier default), and BACnet MS/TP.
Connect the BACnet MS/TP network to the controller's J19 Network Comm port. Connect to Net+, Net-, and
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SHLD.
Wire specifications
A dedicated 22 AWG shielded twisted pair wire (EIA 485)
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Maximum wire length 2000 feet (610 meters) or 32 nodes
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Devices should be daisy-chained and not star-wired
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Attach the drain/shield wire to both ends of the network segment and through every controller
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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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