Connection and circuit diagram for SM 421; DI 16 x UC 120/230 V
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Process Module
Data register and bus control
Figure 4-9 Connection and circuit diagram for SM 421; DI 16 x UC 120/230 V
Technical specifications for 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 ca. 650 g
Module-specific data
Number of inputs 16
Cable length
● unshielded
600 m
Digital modules
4.12 Digital input module SM 421; DI 16 x UC 120/230 V (6ES7421-1FH20-0AA0)
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 123
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