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Siemens Simatic S7-400 User Manual

Page 172

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Digital Modules

4-50

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

4.13

Digital Input Module SM 421; DI 16

120/230 VUC;

(6ES7 421-1FH00-0AA0)

Characteristics

The SM 421; DI 16

120/230 VUC is characterized by the following features:

16 inputs, isolated

Rated input voltage 120/230 VAC/VDC

Suitable for switches and two-wire proximity switches

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