Communication wiring to the zone sensor is not required UNLESS the facility wants to access the unit controller from the zone sensor.
Wiring is made to the UC400-B or Symbio board at the J1 connection points.
Digital Sensor wiring:
Non Digital Wall mounted zone sensor:
Reference the Fan-coil sample schematic for other types of zone sensor wiring options.
Reference board pin details of the UC400 and Symbio 400 Controller