Siemens SIMATIC S7-400 Reference Manual page 110

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