Siemens Simatic M7-400 Reference Manual page 193

Terminal Assignment and Block Diagram of the SM 422; DO 32
Process
Figure 4-17 Terminal Assignment and Block Diagram of the SM 422; DO 32
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
1
1L+
2
3
1L+
4 0
5 1
6 2
7 3
8 4
9 5
6
11 7
12
2L+ 2L+
13
2L+
14
15
0
16
1
17
2
18
3
19
4
20
5
21
6
22
7
23
24
3L+ 25 3L+
3L+
26
0
27
1
28
2
29
3
30
4
31
5
32
6
33
7
34
35
36
4L+ 37 4L+
4L+
38
39 0
1
40
41 2
3
42
43 4
5
44
45 6
7
46
47
48
M
L+
M
Digital Modules
24 VDC/0.5 A
Module
24 VDC/0.5 A
4-71