Hitachi WJ200-007MF Manual page 24

Connecting to PLC
Connection with Input Terminals
Using Internal Power Supply of the Inverter
Hitachi EH-150 series PLC
Output Module EH-YT16
Hitachi EH-150 series PLC
Output Module EH-YT16
P24
Short bar
PLC
L
1
7
Connection with Output Terminals
CM2
Inverter
Attention when inverter plurals is used
When two or more inverters connected
to common I/O wiring as shown in the
figure at the right are turned on at a
different timing, unwanted current flows,
establishing a closed circuit, and the
inverter is judged to be ON, even though
its switch is set to OFF.
To prevent the unwanted current flow,
install diodes rated at 50 V/0.1 A at the
specified locations.
24
P24
S
Short bar
PLC
L
1
7
COM
Inverter
COM P24
PLC
Short bar
L
1
7
S
Inverter
P24
PLC
24VDC
Short bar
L
1
7
Inverter Inverter
11
12
COM
24VDC
Hitachi EH-150 series PLC
Input Module EH-XD16
Short bar P24
Short bar P24
Switch OFF
Using External Power Supply
24VDC
Hitachi EH-150 series PLC
Output Module EH-YTP16
24VDC
Hitachi EH-150 series PLC
Output Module EH-YTP16
P24
24VDC
PLC
24VDC
L
1
7
Inverter
Example of sink logic
Power ON
PLC
L
Input ON
1
Add diode
Power OFF
PLC Without a diode,
unwanted current
L
flows, turning the input
on even when the
1
switch is set to off.
(Please remove the short bar.)
P24
S
PLC
L
1
7
COM
DC24V
Inverter
COM P24
24VDC
PLC
L
1
7
S
Inverter
P24
DC24V
PLC
24VDC
L
1
7
Inverter Inverter
CM2
24VDC
COM
11
12
Hitachi EH-150 series PLC
Input Module EH-XD16
Power ON
P24
PLC
L
Input OFF
1
Power OFF
P24
PLC
L
1
Switch OFF
24VDC
24VDC
24VDC
Install a diode instead
of a short bar to
prevent the unwanted
current flow.