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Inverter doesn’t block the current flowing into itself when it is not powered. This may cause
the closed circuit when two or more inverters are connected to common I/O wiring as
shown below to result in unexpected turning the on the input. This may lead to
dangerous situation. To avoid this closed circuit, please put the diode (rated:50V/0.1A)
in the path as described below.
Power ON Power ON
In case of Source logic
Jumper
wire
Inserting
diode
P24
PLC
L
1
P24
PLC
L
1
Switch
OFF
Power OFF
Input
ON
P24
PLC
L
1
P24
PLC
L
1
Switch
OFF
Power OFF
Input
OFF
Jumper
wire
1
Switch
OFF
Switch
OFF
Input
OFF
Input
ON
P24
PLC
L
P24
PLC
L
P24
PLC
L
P24
PLC
L
1
1
1
Jumper
wire
Jumper
wire