Hitachi L200 Manual Do Utilizador

L200 Inverter

Oper

ations

and Monitor

ing

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.

L

24V

+ 
–

SK

SR

SK

SR

PCS

Input 

circuits

1

5

Logic GND

1

5

GND

Open collector outputs, 

NPN transistors

Input 

switches

SR/SK switch = SK position

Field device

L

24V

+ 
–

SK

SR

SK

SR

PCS

Input 

circuits

1

5

1

5

GND

PNP transistor

sourcing outputs

Input 

switches

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