17
ON
Connecting for matched resistance of 485 communication
JP3
Cin
AI1 input current signal
Vin
AI1 input voltage signal
JP4
Vout1
AO1 output voltage signal
Cout1
AO1 output current signal
2.11 Wiring Notices
Cut off the input power of VFD while dismantling and changing the motor.
Switching of motor or work frequency power supply should only be conducted when the VFD stops output.
To reduce the effect of EMI (electromagnetic interference), add a surge absorber when electromagnetic connector and
relay are close to VFD.
Do not connect AC input power to output terminal U, V, W of VFD.
Add an isolating device to the external control line or use shield line.
Input order signal line should be wired separately with shielding, and away from major loop wiring.
When carrier frequency is less than 4kHz, keep the distance between VFD and motor within 50m; when carrier frequency
exceeds 4kHz, make an appropriate reduction of the distance, and better lay the wire in metal tube.
When adding peripherals (filters, reactors, etc.) to the VFD, check the ground resistance with 1000V tramegger and
ensure the value is above 4 MΩ.
Do not add phase advance capacitor or RC snubber to the U, V, W terminal of VFD.
If the VFD starts frequently, do not cut off the power, use the COM/RUN of control terminal to conduct start and stop so
as not to damage the rectifier bridge.
The earth terminal must be grounded reliably (grounding impedance should be under 100 Ω) to avoid accidents, or there
might be electric leakage.
Choose the wire diameter according to national electrical code while conducting major loop wiring.
