Chapter 2. Wiring | VFD-VJ
2-1
Chapter 2 Wiring
1-1 Description of Wiring
1-2 Description of Terminals on Main Circuit
1-3 Description of Terminals on Control Circuit
After removing the front cover, check if the power and control terminals are clear. Be sure to observe the
following precautions when wiring.
Make sure that power is only applied to the R/L1, S/L2, and T/L3 terminals. Failure to comply may
result in damage to the equipments. The voltage and current should lie within the range as indicated on
the nameplate
All the units must be grounded directly to a common ground terminal to prevent lightning strike or
electric shock.
Please make sure to fasten the screw of the main circuit terminals to prevent sparks which is made by
the loose screws due to vibration
DANGER
It is crucial to turn off the hybrid servo drive power before any wiring installation are
made. A charge may remain in the DC bus capacitors with hazardous voltages even if
the power has been turned off therefore it is suggested for users to measure the
remaining voltage before wiring. For your personnel safety, please do not perform any
wiring before the voltage drops to a safe level < 25 V
DC
. Wiring installation with
remanding voltage condition may cause sparks and short circuit.
Only qualified personnel familiar with hybrid servo drives is allowed to perform
installation, wiring and commissioning. Make sure the power is turned off before wiring
to prevent electric shock.
Make sure that power is only applied to the R/L1, S/L2, and T/L3 terminals. Failure to
comply may result in damage to the equipment. The voltage and current should lie
within the range as indicated on the nameplate.
Check following items after finishing the wiring:
1. Are all connections correct?
2. No loose wires?
3. No short-circuits between terminals or to ground?
The wiring of main circuit and control circuit should be separated to prevent erroneous
actions.
Please use shield wire for the control wiring and not to expose the peeled-off net in front
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