Siemens Simatic M7-400 Reference Manual page 182

Digital Modules
Terminal Assignment and Block Diagram of the SM 422; DO 16
1st supply group
2nd supply group
3rd supply group
4th supply group
5th supply group
6th supply group
7th supply group
8th supply group
Figure 4-14 Terminal Assignment and Block Diagram of the SM 422; DO 16
4-60
Process
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
S7-400, M7-400 Programmable Controllers Module Specifications
Module
1L+
0
1
2
3
2L+
2L+
4
5
6
7
1M
3L+
3L+
0
1
2
3
4L+
4L+
4
5
6
7
2M
2M
24 VDC/2 A
24 VDC/2 A
A5E00069467-07