Install A Noise Filter On The Output Side; Countermeasures Against Induction Noise - Omron 3G3JX User Manual

Never Short-circuit or Ground the Output Terminals
•Never touch the output terminals by hand.
•If the output wires come into contact with metal materials, an electric shock or ground fault will
occur. This is extremely hazardous. Be careful not to short-circuit the output wires.
Do Not Use a Phase Advance Capacitor or Noise Filter
•Doing so may result in damage to the Inverter or cause the parts to burn. Never connect a phase
advance capacitor or LC/RC noise filter to the output circuit.
Do Not Use an Electromagnetic Switch
•If a load is connected to the Inverter during running, an inrush current will actuate the overcurrent
protective circuit in the Inverter. Do not connect an electromagnetic switch or magnetic contactor
(MC) to the output circuit.

Install a Noise Filter on the Output Side

Connect a noise filter to the output side of the Inverter to reduce induction and radio noise.
Molded-case circuit breaker
Power
supply
Induction noise: Electromagnetic induction can generate noise on the signal line, causing the
controller to malfunction.
Radio noise: Electromagnetic waves from the Inverter and I/O cables can cause the radio receiver
to generate noise.

Countermeasures Against Induction Noise

To reduce induction noise from the output side, the following method is also effective.
•Run the cables collectively through the mounted metal pipe. Keeping the metal pipe at least 30 cm
away from the signal line reduces induction noise.
Molded-case circuit breaker
Power
supply
(MCCB)
Inverter
Noise filter
3G3JX
3G3AX-NFO
Induction noise
Signal line
Controller
(MCCB)
Inverter
3G3JX
Signal line
M
Radio noise
AM radio
M
30 cm min.
Controller
2-2 Wiring
2
2-20