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Wiring shall be checked whether correct or not. Peripheral wiring shall fulfill the following requirements.
(Do not use a buzzer of control circuit to check wiring)
(A) Wiring for control circuit Power supply must be isolated or far from other high voltage wirings or high current
power lines, thus electromagnetic interference can be avoided. See diagrams below:
●Individual power supply bridge for inverter
Electromagnetic
Contactor
Power
supply
IM
Inverter
●If inverter power supply circuit is used commonly
with other machines, inverter-specialized noise filter or
isolating transformer shall be added.
Inverter
Electromagnetic
Contactor
Machine
Electromagnetic
Contactor
Power
supply
Invert
er
filter
IM
Electromagnetic
Contactor
IM
Inverter
Machine
Isolated transformer
Power
suppy
●Good effect may not be received if general use noise
filters are applied
Electromagnetic
Contactor
Power
supply
IM
Inverter
Machine
Anti-
interferen
ce filter in
general
use
Electromagnetic
Contactor
×
Electromagnetic
Contactor
Power
supply
IM
Inverter
Machine
Electromagnetic
Contactor
Anti-
interferen
ce filter in
general
use
×
● Interference during transmission can be prohibited by adding an inverter-specialized radio interference
suppression filter at main circuit output side. For preventing electromagnetic radiation, a metal tube shall be
installed, and distance from signal wiring of other control machines shall be 30cm at least.
SIGNAL WIRE
IM
30cm Above
Power
supply
Electromagnetic
Contactor
Iron Box
Inverter
Noise
filter
Noise
filter
Control
Device