Siemens S7-400 ユーザーズマニュアル

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S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07

 

 

The SM 421; DI 16 

 

 120/230 VUC is characterized by the following features:

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16 inputs, isolated in groups of 4

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Rated input voltage 120/230 VUC

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Input characteristic curve to IEC 61131; type 2

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Suitable for switches and two-wire proximity switches (BEROs)

The status LEDs indicate the process status.