Siemens SIMATIC S7-400 Reference Manual page 127
Automation system module
data
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Connection and circuit diagram for SM 421; DI 32 x UC 120 V
Process
Figure 4-10
Technical specifications for SM 421; DI 32 x UC 120 V
Dimensions W x H x D (mm)
Weight
Number of inputs
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
4.13 Digital input module SM 421; DI 32xUC 120 V (6ES7421-1EL00-0AA0)
1
2
3
0
4
1
5
2
6
3
7
4
8
5
9
6
10
7
11
12
1N
13
14
0
15
1
16
2
17
3
18
4
19
5
20
6
21
7
22
23
2N
24
25
26
27
0
1
28
29
2
3
30
4
31
5
32
6
33
7
34
35
3N
36
37
38
39
0
1
40
41
2
3
42
43
4
5
44
45
6
7
46
47
48
4N
Connection and circuit diagram for SM 421; DI 32 x UC 120 V
Module
Dimensions and weight
25 x 290 x 210
ca. 600 g
Module-specific data
32
Digital modules
127
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