Information is exchanged through the local control panel, the PC interface, or two optional communication interfaces (channel 1 and channel 2).

Using the first channel of the communication interfaces (COMM1), the P632 can be wired either to the substation control system or to a telecontrol system. This channel is optionally available with a switchable protocol (per IEC 60870‑5‑103, IEC 870‑5‑101, DNP 3.0, MODBUS or Courier).

The second communication interface (COMM2, communication protocol per IEC 60870‑5‑103 only) is designed for remote control.

As an order option, there is an Ethernet interface for communication per IEC 61850 available instead of channel 1.

External clock synchronization can be accomplished via one of the communication protocols or by using the optional IRIG‑B input.