Siemens M7-400 Benutzerhandbuch
Digital Modules
4-44
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
4.12
Digital Input Module SM 421; DI 16
24/60 VUC;
(6ES7 421-7DH00-0AB0)
Characteristics
The SM 421; DI 16
24/60 VUC is characterized by the following features:
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16 inputs, individually isolated
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Rated input voltage 24 VUC to 60 VUC
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Suitable for switches and two-wire proximity switches (BEROs)
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Suitable as active high and active low input
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Group error display for internal faults (INTF) and external faults (EXTF)
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Programmable diagnostics
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Programmable diagnostic interrupt
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Programmable hardware interrupt
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Programmable input delays
The status LEDs indicate the process status.