Hitachi SJ200 Series - Manual (Page 138)

SJ200 Inverter
Oper
ations
and Monitor
ing
4–11
The two diagrams below show input wiring circuits using an external supply. If using the
upper wiring diagram, be sure to use a diode with the external supply. This will prevent a
power supply contention in case the SR/SK switch is accidentally placed in the incorrect
position. Be sure to use the correct SR/SK switch position shown for each wiring
diagram.
SJ200
L
24V
+
–
SK
SR
SK
SR
PCS
Input
circuits
1
6
Logic GND
1
6
GND
Open collector outputs,
NPN transistors
Input
switches
Sinking Inputs, External Supply
SR/SK switch = SK position
Field device
SJ200
L
24V
+
–
SK
SR
SK
SR
PCS
Input
circuits
1
6
1
6
GND
PNP transistor
sourcing outputs
Input
switches
Sourcing Inputs, External Supply
SR/SK switch = SR position
Field device
Logic GND
24V
+
–
+
–
+V
* *
* Note: If the external power supply GND is (optionally)
connected to [L], then install the above diode.
24V
+
–
+
–
24V