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3. WIRING
3-7
3
3.2.5 Wiring of the motor connection terminals U, V, W
Connect these terminals to the motor. Match the phase sequence of the motor connection terminals
U, V, W with that of the motor cables. Incorrect phase sequence will run the motor in reverse.
UVW
UVW
Motor
CAUTION
The wiring length between the drive unit and motor should be 100m maximum. Long
wiring may cause torque to be insufficient or the overcurrent protection function to
be activated.
Between the drive unit and motor, do not fit a power capacitor, surge suppressor or
FR-BIF radio noise filter (option).
3.2.6 Wiring of the ground terminals
There are two ground terminals. Connect one ground terminal to the motor's ground terminal and
perform shared grounding on the drive unit.
MotorDrive unit
NOTICE
Avoid shared grounding with the other equipment susceptible to noise, and perform
exclusive or single-point grounding.
Drive unit Drive unit
Drive unit
Other
equipment
Other
equipment
Other
equipment
Shared grounding Not allowed
Exclusive grounding Allowed 1-point grounding Allowed
WARNING
Ground the drive unit and motor securely to prevent an electric shock due to
leakage currents. (Class D grounding, grounding resistance 100
Ω
ΩΩ
Ω
max.)
For grounding, connect the cable to the exclusive ground terminal. (Do not use the
screw of the casing, chassis or the like.)