The Sensor (SA Bus) port on the bottom of the controller is an RJ-12, 6-position modular jack that provides a connection for MAP Gateway, the VAV Balancing Tool, specified network sensors, or other SA Bus devices with RJ-12 plugs. When the PCA is configured for N2 network communication, you must download and commission the controller using the SA Bus port.
The Sensor port is connected internally to the SA bus terminal block. For more information about the Sensor port functions, requirements and ratings, see Communications bus and supply power terminal block. The Sensor Port pin assignment is shown in Figure 1 (but only on FEC models without integral display and push buttons).