Networking
5-19
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
5.6 Bus Connectors
Purpose of the Bus Connector
The bus connector is used to connect the PROFIBUS-DP bus cable to the MPI or
PROFIBUS-DP interface. In this way, you establish the connection to other nodes.
There are two different bus connectors:
Bus connector without PG connector
(6ES7 972-0BA20-0XA0)
Bus connector with PG connector
(6ES7 972-0BB20-0XA0)
Appearance (6ES7 972-0B.20 ...)
Screws for
mounting on
station
PG connector (only with
6ES7 972-0BB20-0XA0)
9-pin sub. D male
connector for
connection to MPI or
PROFIBUS-DP
interface
Housing screw
Switch for terminating
resistor
Clamp hinge for vertical
or 30° cable routing
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