3.6.1 Wiring Input and Output Power Terminals
General Precautions on Wiring:
•
Apply the rated torque to terminal screws. Loosened screws can cause a short circuit and
malfunction. Tightening the screws too much can damage the terminals and cause a short
circuit and malfunction as well.
•
Use copper wires with only a 600V, 75W rating for wiring.
•
When a power supply is connected and applied to the output terminals (U,V,W), the
internal circuits of the drive will be damaged.
•
Use ring terminals with insulated caps when wiring the input power and the motor.
•
Do not leave wire fragments inside the drive. Wire fragments can cause faults,
breakdowns, and malfunctions.
•
Use wires for input and output with sufficient thickness to ensure the voltage drop is less
than 2%. If the wire length between the drive and the motor is long, and the drive is
operating at low frequencies, the motor torque drops due to the voltage drop caused by
the wire.
•
The total wire length should be less than 500m. The overcurrent protective function can
operate or the equipment connected to the output side can malfunction due to the
increased leakage capacitance between the wiring when the motor is far away from the
drive. The total wiring length should also be less than 500m when more than one motor
is connected to the drive. Do not use a 3-wire cable for long distances.
•
Connect only the recommended braking resistor between the B1, B2 terminals. Never
short the B1 and B2 terminal. Shorting the terminals may cause internal damages to the
drive.
•
The main circuit of the drive contains high frequency noise, and can hinder
communication equipment near the drive. Installing radio noise filters, line noise filter on
the input side of the drive can reduce the hindrance.
•
Do not use a phase advancing capacitor, surge suppressor, or radio noise filters on the
output side of the drive. Doing so may damage these components.
•
Always check the charge lamp of the power terminal is OFF before wiring the terminals.
The capacitor is charged with high-voltage even after the power is disconnected, and can
be dangerous.
26
3 - RECEIVING AND INSTALLATION
Power supply must be connected to the R,S, and T Terminals.
Connecting it to the U,V, W terminals causes internal damage to the drive. Arranging
the phase sequence is not necessary.
Motor should be connected to the U,V,and W Terminals.
If the forward command (FX) is on, the motor should rotate counter clockwise when
viewed from the load side of the motor. If the motor rotates in the reverse direction,
switch the U and V terminals.
WARNING
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