Mitsubishi Electric MELSERVO-J4 series Instruction Manual page 5

(2) Wiring
Wire the equipment correctly and securely. Otherwise, the servo motor may operate unexpectedly.
Do not install a power capacitor, surge killer, or radio noise filter (FR-BIF-(H) option) on the servo
amplifier output side.
To avoid a malfunction, connect the wires to the correct phase terminals (U, V, and W) of the servo
amplifier and servo motor.
Connect the servo amplifier power output (U, V, and W) to the servo motor power input (U, V, and W)
directly. Do not let a magnetic contactor, etc. intervene. Otherwise, it may cause a malfunction.
Servo amplifier
The connection diagrams in this instruction manual are shown for sink interfaces, unless stated
otherwise.
The surge absorbing diode installed to the DC relay for control output should be fitted in the specified
direction. Otherwise, the emergency stop and other protective circuits may not operate.
When the cable is not tightened enough to the terminal block, the cable or terminal block may generate
heat because of the poor contact. Be sure to tighten the cable with specified torque.
Connecting a servo motor for different axis to the U, V, W, or CN2 may cause a malfunction.
(3) Test run and adjustment
Before operation, check the parameter settings. Improper settings may cause some machines to perform
unexpected operation.
Never adjust or change the parameter values extremely as it will make operation unstable.
Do not close to moving parts at servo-on status.
(4) Usage
Provide an external emergency stop circuit to ensure that operation can be stopped and power switched
off immediately.
Do not disassemble, repair, or modify the equipment.
Before resetting an alarm, make sure that the run signal of the servo amplifier is off in order to prevent a
sudden restart. Otherwise, it may cause an accident.
CAUTION
Servo motor
U
U
V
V
M
W
W
Servo amplifier
24 V DC
DOCOM
Control output
RA
signal
For sink output interface
CAUTION
CAUTION
Servo amplifier
U
V
W
Servo amplifier
DOCOM
Control output
signal
For source output interface
A - 4
Servo motor
U
V
M
W
24 V DC
RA