Siemens M7-400 Benutzerhandbuch

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S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

 

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.

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 

s”, you require STEP 7 V 5.2.