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Siemens Simatic S7-400 User Manual

Page 142

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Digital Modules

4-20

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

4.8

Digital Input Module SM 421; DI 32

24 VDC;

(6ES7421-1BL01-0AA0)

Characteristics

The digital input module SM 421; DI 32

24 VDC has the following features:

32 inputs, isolated in a group of 32

24 VDC rated input voltage

Suitable for switches and two/three/four-wire proximity switches (BEROs,
IEC 61131; type 1)

The status LEDs indicate the process status.

Notice

If you use the module with the order number 6ES7421-1BL01-0AA0 as a
replacement for the module with the order number 6ES7421-1BL00-0AA0, you can
leave PIN 3 wired. If you run modules 6ES7421-1BL00-0AA0 and
6ES7421-1BL01-0AA0 involved in mutual exchange, you have to wire and supply
PIN 3 as described in Section 4.7.

This manual is related to the following products: