BACnet MS/TP uses RS-485 2-wire or 3-wire connections between HVAC controllers VAV boxes thermostats and BACnet panels for building automation communication up to 76.8 kbps.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | DATA+ | RS-485 data positive | BUS |
| 2 | DATA- | RS-485 data negative | BUS |
| 3 | GND | Ground reference optional | GND |
BACnet MS/TP uses RS-485 2-wire or 3-wire connections between HVAC controllers VAV boxes thermostats and BACnet panels for building automation communication up to 76.8 kbps.