
Digital modules
4.13 Digital input module SM 421; DI 32xUC 120 V (6ES7421-1EL00-0AA0)
S7-400 Automation System Module Data
138 Reference Manual, Edition 09/2009, A5E00850736-06
4.13 Digital input module SM 421; DI 32xUC 120 V (6ES7421-1EL00-0AA0)
Features
The SM 421; DI 32 x UC 120 V is characterized by the following features:
● 32 inputs, isolated
● Nominal input voltage 120 VUC
● Suitable for switches and 2-wire proximity switches
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