Omron MX2 Series User Manual page 120

2 Design
⚫ For source logic
Switch OFF
With no diode inserted, the input turns ON
due to sneak current even when the switch is
OFF.
2 - 42
Power ON
Add a diode
Use an external
power supply
Multi-function Compact Inverter 3G3MX2-EV2 User's Manual (I666-E1)
Power ON
Switch OFF
In place of short-circuit bar, insert a diode
to prevent sneak current.
Power ON
Switch OFF
The use of an external power supply with
the short-circuit bar removed does not
cause sneak current.