Sinking Inputs, Internal Supply; Sourcing Inputs, Internal Supply - Hitachi SJ200 Series Instruction Manual

4–10
Using Intelligent Input Terminals
The two diagrams below show input wiring circuits using the inverter's internal +24V
supply. Each diagram shows the connection for simple switches, or for a field device
with transistor outputs. Note that in the lower diagram, it is necessary to connect
terminal [L] only when using the field device with transistors. Be sure to use the correct
SR/SK switch position shown for each wiring diagram.

Sinking Inputs, Internal Supply

SR/SK switch = SK position
Open collector outputs,
NPN transistors
Field device

Sourcing Inputs, Internal Supply

SR/SK switch = SR position
PNP transistor
sourcing outputs
Field device
to PNP bias
circuits
Input
switches
1
6
GND Logic GND
Common,
to [PCS]
Input
switches
1
6
GND Logic GND
SJ200
PCS
SK
SR
SK
SR
1
Input
circuits
6
L
SJ200
PCS
SK
SR
SK
SR
1
Input
circuits
6
L
24V
+
–
24V
+
–