Hitachi WJ200 Series Quick Reference Manual page 35

The two diagrams below show input wiring circuits using an external supply. If using the
"Sinking Inputs, External Supply" in below wiring diagram, be sure to remove the jumper
wire, and use a diode (*) with the external supply. This will prevent a power supply
contention in case the jumper wire is accidentally placed in the incorrect position. For the
"Sourcing Inputs, External Supply", please connect the jumper wire as drawn in the
diagram below.
Sinking Inputs, External Supply
Jumper wire
= Removed
Field device
PLC
+
24V
-
GND
1
7
Open collector outputs,
NPN transistors
Sourcing Inputs, External Supply
Jumper wire
= Removed
PNP transistor
sourcing outputs
Field device
1
7
+
24V
-
GND
*
24V
+
-
Input switches
* Note: If the external power supply to GND is (optionally)
connected to [L], then install the above diode.
** Note: Make sure to remove the j
using an external power supply.
PLC
Input switches
* Note: Make sure to remove the j
using an external power supply.
**
P24
*
Input common
PLC
Logic GND
L
1
7
24V
+ P24
-
*
Input common
PLC
L
1
7
29
WJ200
24V
+
-
Input
circuits
umper wire
WJ200
24V
+
-
Input
circuits
umper wire
in case of
in case of