Hitachi wj200 series Quick Reference Manual page 112

In case of Sink logic
Jumper
wire
Jumper
wire
Switch
OFF
In case of Source logic
Jumper
wire
Jumper
wire
Switch
OFF
The current loop cause turn the input ON
even the switch is off when diode is not
inserted.
Power ON
P24
PLC
L
Input
Inserting
ON
1
Power OFF
P24
PLC
L
1
P24
PLC
L
Input
1
ON
P24
PLC
L
1
diode
Switch
OFF
Switch
OFF
The current loop is to be prevented by
inserting diode instead of short bar.
112
Power ON
P24
PLC
L
Input
1
OFF
Power OFF
P24
PLC
L
1
P24
PLC
L
Input
1
OFF
P24
PLC
L
1