Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 6

(2) Wiring
Do not connect AC power directly to the servo motor. Otherwise, a fault may occur.
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 (connector), the cable or terminal block
(connector) may generate heat because of the poor contact. Be sure to tighten the cable with specified
torque.
Connecting an encoder for different axis to the CN2A or CN2B connector may cause a malfunction.
Connecting a servo motor for different axis to the CNP3A or CNP3B connector may cause a malfunction.
(3) Test run 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 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, which may be caused by
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 servo motor.
The electromagnetic brake on the servo motor is designed to hold the motor shaft and should not be used
for ordinary braking.
For such reasons as service life and mechanical structure (e.g. where a ball screw and the servo motor are
coupled via a timing belt), the electromagnetic brake may not hold the motor shaft. To ensure safety, install
a stopper on the machine side.
Servo amplifier
24VDC
DOCOM
Control output
RA
signal
DICOM
For the sink output interface
CAUTION
Servo amplifier
Control output
signal
For the source output interface
CAUTION
CAUTION
A - 5
24VDC
DOCOM
RA
DICOM