Siemens Simatic M7-400 Reference Manual page 559

13.9.1 Pin Assignments
X1 Connector
There is a 9-pin sub D socket connector on the frontside of the submodule for
plugging in the connecting cable. See Table 13-45 for the pin assignments.
Table 13-45
Pin Signal
1 –
2 M 24
3 LTG_B
4 RTSAS
5 M5
6 P5
7 P 24 V
8 LTG_A
9 –
What Can be Connected to the Interface Submodule?
Devices with PROFIBUS can be connected, such as the following:
ET 200 M, ET 200 U (B/C) and other devices conforming to the standard.
Additional S7 DP masters (PG, OP)
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
X1 Socket, IF 964-DP (9-Pin Sub D Connector)
24 V reference potential (6ES7 964-2AA01-0AB0)
Line B
Request to send (AS)
Operational ground (isolated)
ext
+ 5 V (isolated), max. 20 mA
ext
(for supplying the bus terminator)
+24 V, max. 150 mA, non-isolated
(6ES7 964-2AA01-0AB0)
Line A
Meaning
Interface Submodules
Direction
Output
Input/Output
Output
Output
Output
Output
Input
13-63