Mitsubishi Electric MELSERVO-J3 Series Instruction Manual page 6

Connect the servo amplifier power supply output (U, V, and W) to the direct drive motor power supply input
(U, V, and W) directly. Do not let a magnetic contactor, etc. intervene. Otherwise, it may cause a
malfunction.
Servo amplifier
Do not connect AC power directly to the direct drive motor. Otherwise, it may cause a malfunction.
The surge absorbing diode installed on 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 (connector), the cable or terminal block
(connector) may generate heat because of the poor contact. Be sure to tighten the cable with specified
torque.
(3) Test run adjustment
Before operation, check the parameter settings. Improper settings may cause some machines to perform
unexpected operation.
The parameter settings must not be changed excessively. Operation will be instable.
(4) Usage
Provide an external emergency stop circuit to ensure that operation can be stopped and power switched
off immediately.
Any person who is involved in disassembly and repair should be fully competent to do the work.
Before resetting an alarm, make sure that the run signal of the servo amplifier is off to prevent an accident.
A sudden restart is made if an alarm is reset with the run signal on.
Do not modify the equipment.
Use a noise filter, etc. to minimize the influence of electromagnetic interference.
Electromagnetic interference may be given to electronic equipment used near the servo amplifier.
Burning or breaking a servo amplifier may cause a toxic gas. Do not burn or break a servo amplifier.
Use the servo amplifier with the specified direct drive motor.
Direct drive motor
U
U
V
V
W
W
Servo amplifier
24VDC
DOCOM
Control output
signal
DICOM
For sink output interface
CAUTION
Servo amplifier
U
V
M
W
Servo amplifier
Control output
RA
signal
For source output interface
CAUTION
CAUTION
A - 5
Direct drive motor
U
V
M
W
24VDC
DOCOM
RA
DICOM