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Siemens Simatic S7-400 User Manual

Page 154

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Digital Modules

4-32

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

4.10

Digital Input Module SM 421; DI 16

24 VDC;

(6ES7421-7BH01-0AB0)

Characteristics

The digital input module SM 421; DI 16

24 VDC has the following features:

16 inputs, isolated in 2 groups of 8

24 VDC rated input voltage

Suitable for switches and two/three/four-wire proximity switches
(BEROs, IEC 61131; type 2)

2 short-circuit-proof sensor supplies for 8 channels each

External redundant power supply possible to supply sensors

“Sensor supply (Vs) O.K.” status display

Group error display for internal faults (INTF) and external faults (EXTF)

Programmable diagnostics

Programmable diagnostic interrupt

Programmable hardware interrupt

Programmable input delays

Parameterizable substitute values in the input range

The status LEDs indicate the process status.

Note

The spare parts of this module is compatible with SM 421; DI 16

DC 24 V;

(6ES7 421-7BH00-0AB0).

To be able to use the new function “input delay 50

m

s”, you require STEP 7 V 5.2.

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