Wiring
‑55‑
3 Wiring
3.1 Wiring Precautions
Read through the safety instructions in Chapter "Fundamental Safety Instructions". Failure
to comply may result in serious consequences.
● Do not use the power from IT system for the drive. Use the power from TN/TT
system for the drive. Failure to comply may result in an electric shock.
● Connect an electromagnetic contactor between the input power supply and the
main circuit power supply of the drive (L1, L2 for single‑phase; L1, L2, L3/R, S, T for
three‑phase) to form a structure allowing independent power cutoff on the power
supply side of the drive. This is to prevent fire accident caused by continuous high
current generated upon fault.
● Check that the input power supply of the drive is within the specified voltage
range. Failure to comply may result in faults.
● Do not connect the output terminals U, V, and W of the drive to a three‑phase
power supply. Failure to comply may result in physical injury or a fire.
● Do not connect the motor terminals U, V, and W to a mains power supply. Failure
to comply may result in physical injury or a fire.
● Use the ALM (fault) signal to cut off the main circuit power supply. A faulty braking
transistor may overheat the regenerative resistor and lead to a fire.
● Connect the PE terminal of the drive to the PE terminal of the control cabinet.
Failure to comply may result in an electric shock.
● Ground the entire system properly. Failure to comply may result in equipment
malfunction.
● After the power supply is cut off, residual voltage is still present in the internal
capacitor of the drive, wait for at least 15 min before further operations. Failure to
comply may result in an electric shock.
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