Notes On Using Multiple Inverters - Hitachi NES1-004SB Quick Reference Manual

5.8 Notes on using multiple inverters

A plurality of inverter uses the common input and when inverter is timing of different power-on, as shown in
the figure below the current flowing around. The input may be recognized as ON in spite of OFF. In this
case, please put a diode(rated 50V/0.1A) as shown in the figure to prevent.
(1) Sink logic
short circuit bar
short
circuit bar
SW OFF
The input is recognized
as ON in spite of OFF without Diode.
Power-ON
P24
PLC
L
Input
1
ON
Additional diode
Power-OFF
P24
PLC
L
1
SW OFF
Providing a diode instead of the short circuit
bar, so that the current flowing is prevented.
5 - 15
Chapter 5 Wiring
Power-ON
P24
PLC
L
Input
1
OFF
Power-OFF
P24
PLC
L
1