Siemens Simatic M7-400 Reference Manual page 521

Figures 13-7 and 13-8 show the circuit block diagrams and the terminal connection
diagrams for wiring the digital inputs and digital outputs.
Circuit block
diagram
Figure 13-7 Circuit Block Diagram and Terminal Connection Diagram for Wiring the Digital Inputs
13
DI7 25
12
DI6 24
11
4M 23
10
DI5 22
9
DI4 21
8
3M 20
7
DI3 19
6
DI2 18
5
2M 17
4
DI1 16
3
DI0 15
2
1M 14
1
Terminal connection diagram
Figure 13-8 Circuit Block Diagram and Terminal Connection Diagram for Wiring the Digital Outputs
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Internal
data bus
M
internal
5M
5L+
DO0
DO1
DO2
DO3
6M
6L+
DO4
DO5
DO6
DO7
NC
Interface Submodules
DI7 25
DI6 24
4M 23
DI5 22
DI4 21
3M 20
DI3 19
DI2 18
2M 17
DI1 16
DI0 15
1M 14
Terminal connection diagram
Internal
data bus
M
internal
Circuit block diagram
13 5M
12 5L+
11 DO0
10 DO1
9 DO2
8 DO3
7 6M
6 6L+
5 DO4
4 DO5
3 DO6
2 DO7
1 NC
L+
M
13-25