Wiring and block diagram of the SM 421; DI 16 x UC 120/230 V
1
2
3
4
5
6
7
8
9
10
11
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15
16
17
18
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29
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31
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48
4 N
3 N
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0
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7
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7
1
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0
3
1N
2N
Process
Module
Data register and bus control
Figure 4-8
Wiring and block diagram of the SM 421; DI 16 x UC 120/230 V
Specifications of the SM 421; DI 16 x UC 120/230 V
Dimensions and weight
Dimensions W x H x D (mm)
25 x 290 x 210
Weight
Approx. 650 g
Module-specific data
Number of inputs
16
Digital modules
4.11 Digital input module SM 421; DI 16 x UC 120/230 V (6ES7 421-1FH00-0AA0)
S7-400 Automation System Module Data
120
Reference Manual, Ausgabe 11/2016, A5E00850736-08