Siemens SIMATIC NET SCALANCE WxM763 Operating Instructions Manual page 60

Connection
6.5 Digital input/output
Digital input
The 2-pin terminal block has the following assignment:
Contact
+DI
-DI
The voltage applied to the "DI" contact is converted to a digital status by the device as
follows:
Voltage
-30 to +3 V DC
+10 to +30 V DC
60
Assignment
Input
Ground
Status
0
1
Operating Instructions, 03/2022, C79000-G8976-C653-01
SCALANCE WxM763