Siemens SIMATIC NET SCALANCE WUM766-1 - Page 60

Connection
6.5 Digital input/output
SCALANCE WxM766
60 Operating Instructions, 03/2022, C79000-G8976-C617-03
Rules for wiring
• To wire the digital input/output, use a copper cable of category AWG18-16 or a cable
with a cross-section of 0.75 to 1.5 mm
2
.
• Always wire the digital input/output in pairs.
• The maximum permissible cable length is 3 m.
Position / Assignment
Example:
1
DI-
Ground
2
DO-
Ground
3
DO+
Switching signal
4
DI+
Input
5
NC
Not connected
If there is an adequate switching voltage at the digital input, the digital input is active
and the "DI" LED is lit.
The voltage applied to the "DI" contact is converted to a digital status by the device as
follows:
Voltage
Status
-30 to +3 V DC
0
+10 to +30 V DC
1
The digital output is a switch that switches the signal at +DO to -DO.