Siemens Simatic S7-400 - Manual (Page 206)

Digital Modules
4-84
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Terminal Assignment and Block Diagram of the SM 422;
DO 16
120/230 VAC/2 A
Byte 0
16 digital outputs (4 chassis grounds)
Byte 1
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
47
46
48
Data register and bus control
10
LED control
F1
F2
F3
F4
1
2
3
4
5
6
7
8
9
1
2
0
3
5
6
4
7
5
6
4
7
1
2
0
3
4N
1N
1L
2L
3L
2N
4L
3N
INTF
EXTF
Process Module
Figure 4-20 Terminal Assignment and Block Diagram of the SM 422; DO 16 120/230 VAC/2 A