The Sensor (SA Bus) port on the bottom of the controller is an RJ-12, 6-position modular jack that provides a connection for the VAV Balancing Tool, specified network sensors, or other SA Bus devices with RJ-12 plugs.
A DLK0350 or DIS1710 Local Controller Display can be connected to the SA Bus port also.
The Sensor port is connected internally to the SA bus, but cannot be used at the same time as the terminal block.