Hitachi WJ Series

Chapter 5 Wire Connection
5-4-9
5.4.3 Switching Sink/Source Logic and Connecting External Power
Supply/Programmable Controller
 How can the sink/source logic of the I/O terminals be switched?
 How can an external power supply or external devices such as a programmable controller (PLC)
be connected to the I/O terminals?
Method of switching sink/source logic for intelligent input terminals
 To switch the logic of the input terminals to source logic, remove the short-circuit wire between
[P24] terminal and [PLC] terminal on the control terminal and connect it between [PLC] terminal
and [L] terminal. (The factory default of the logic depends on the destination region.)
 Refer to the figure below for wiring when using an external power supply and wiring with
external devices such as programmable controllers.
Connecting the intelligent input terminals to a programmable controller
■ Sink logic
When using the inverter's internal power supply
When using an external power supply
(Remove the short-circuit wire from the control terminal.)
■ Source logic
When using the inverter's internal power supply
When using an external power supply
(Remove the short-circuit wire from the control terminal.)
24 VDC
S
P24
Short-circuit
wire
PLC
L
1
7
COM
Inverter
Output module
(EH-YT**, etc.)
24 VDC
P24
PLC
L
1
S
7
24 V
DC
COM
Output module
(EH-YTP**, etc.)
Inverter
24 VDC
PLC
L
1
Short-
circuit
wire
7
S
Output module
(EH-YT**, etc.)
Inverter
COM
P24
COM
P24
24 VDC
PLC
24 VDC
L
1
7
S
Inverter
Output module
(EH-YTP**, etc.)
Short-circuit
wire
PLC
P24
L
1
2
Sink logic
Short-circuit
wire
PLC
P24
L
1
2
Source logic
(Factory default setting)
Switching the
short-circuit
wire wiring
Q
▼