Siemens Simatic S7-400

Wiring diagram of the SM 421; DI 16 x AC 120 V
1
2
3
4 0
Byte 0
5
6
1
7
8
2
9
10
3
11
13
1N
12
14
15
4
16
17
5
18
19
6
20
21
7
22
24
23
26
27
28
29
30
31
32
33
34
36
35
38
39
40
41
42
43
44
45
46
48
47
25
37
0
1
2
3
4
5
6
7
2N
3N
4N
5N
6N
7N
8N
9N
10N
11N
12N
13N
14N
15N
16N
Byte 1
Process Module
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Adaptation
Data register and bus control
Figure 4-5 Wiring diagram of the SM 421; DI 16 x AC 120
Specifications of SM 421; DI 16 x AC 120 V
Dimensions and weight
Dimensions W x H x D (mm) 25 x 290 x 210
Weight Approx. 650 g
Module-specific data
Digital modules
4.9 Digital input module SM 421; DI 16 x AC 120 V (6ES7421-5EH00-0AA0)
S7-400 Automation System Module Data
110 Reference Manual, Ausgabe 11/2016, A5E00850736-08