Mitsubishi Electric MELSEC-L Series User Manual page 70

Avoid wiring shown below when connecting with a voltage output type sensor.
This wiring cause current to flow to the DC input module through a pull-up resistor in a sensor. Therefore, input current may
not reach ON current of the module and the Input signal does not turn on.
DC input module
Voltage output type
Power supply
for sensor
Pull-up resistor
Output
X0
0V
COM
68