Chapter 4 WiringME300
4-2
After you remove the front cover, verify that the power and control terminals are clearly visible.
Read the following precautions to avoid wiring mistakes.
It is crucial to turn off the AC motor drive power before you make any wiring. A
charge with hazardous voltages may still remain in the DC BUS capacitors even if
the power is off for a short time. Measure the remaining voltage with a DC voltmeter
on +1/DC+ and DC- before wiring. For your safety, do not start any wiring before
the voltage drops to a safe level (less than 25 V
DC
). Installing wiring with a residual
voltage may cause injuries, sparks and short circuits.
Only qualified personnel familiar with AC motor drives are allowed to perform
installation, wiring and commissioning. Make sure the power is turned off before
wiring to prevent electric shock.
The terminals R/L1, S/L2, and T/L3 are for mains power input. If mains power is
incorrectly connected to other terminals, it may result in damage to the equipment.
The voltage and current must be in the range indicated on the nameplate (see
Section 1-1).
All units must be grounded directly to a common ground terminal to prevent
electrical shock or damage from lightning.
Tighten the screw of the main circuit terminals to prevent sparks due to loosening
of the terminals resulted from vibration.
When wiring, choose wires that comply with local regulations for your safety.
Check the following items after you finish the wiring:
1. Are all connections correct?
2. Are there any loose wires?
3. Are there any short circuits between the terminals or to ground?
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