4.7 Digital input module SM 421; DI 32 x DC 24 V (6ES7421-1BL01-0AA0)
Properties
Key properties of the SM 421; DI 32 x 24 V DC:
● 32 inputs, isolated in a group of 32
● Rated input voltage 24 V DC
● Suitable for switches and 2-/3-/4-wire proximity switches (BEROs, IEC 61131; type 1)
The status LEDs indicate the process status.
Digital modules
4.7 Digital input module SM 421; DI 32 x DC 24 V (6ES7421-1BL01-0AA0)
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08 97
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