The bus connector is plugged directly into the PROFIBUS interface (9-pin Sub-D socket) of the PROFIBUS station or a PROFIBUS network component.

The incoming and outgoing PROFIBUS cable is connected in the plug using 4 terminals.

By means of an easily accessible switch which is clearly visible from the outside, the line terminator integrated in the bus connector can be connected (not in the case of 6ES7 972-0BA30-0XA0). In this process, incoming and outgoing bus cables in the connector are separated (separation function).

This must be done at both ends of a PROFIBUS segment.