Siemens SIMATIC NET SCALANCE M826 Operating Instructions Manual page 43

Digital input
The 2-pin terminal block has the following assignment:
Figure 4-1
DI+
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.
SCALANCE M826
Operating Instructions, 08/2018, C79000-G8976-C362-05
Digital input M826
24 VDC
-
Connecting up
4.3 Digital input/output
43