The P632 has a PC interface as a standard component. Communication module A is optional and can be provided with one or two communication channels – depending on the design version. Communication between the P632 and the control station’s computer is through the communication module A. Setting and interrogation is possible through all the P632's interfaces.

If the communication module A with two communication channels is installed, settings for two communication interfaces will be available. The setting of communication interface 1 (COMM1) may be assigned to the physical communication channels 1 or 2 (see Chapter “Assigning Communications Interfaces to Physical Communications Channels”). If the COMM1 settings have been assigned to communication channel 2, then the settings of communication interface 2 (COMM2) will automatically be active for communication channel 1.

COMM2 can only be used to transmit data to and from the P632 if its PC interface has been de-activated. As soon as the PC interface is used to transmit data, COMM2 becomes “dead”. It will only be enabled again when the “time-out” period for the PC interface has elapsed.

If tests are run on the P632, the user is advised to activate the test mode. In this way the PC or the control system will recognize all incoming test signals accordingly (see Chapter “Test Mode”).