Siemens SCALANCE M874-3 - Page 50

Connecting up
4.5 Digital input/output
SCALANCE M874, M876
50 Operating Instructions, 08/2018, C79000-G8976-C331-08
Digital input
The 2-pin terminal block has the following assignment:
DI+
24 VDC
DI- (input ground)
-
If there is an adequate switching voltage at the digital input, the digital input is active and the
"DI" LED is lit.