Connecting up
3.5 Digital input/output
SCALANCE M874, M876
38 Operating Instructions, 06/2015, C79000-G8976-C331-05
If there is an adequate switching voltage at the digital input, the digital input is active and the
"DI" LED is lit. This means that, for example a local application connected to the in port can
trigger an alarm message by SMS outside the IP data connection.
The 2-pin terminal block has the following assignment:
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