Mitsubishi Electric MELSERVO-J2-Super Series, Transition Handbook

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A - 5
(4) Usage
CAUTION
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.
CAUTION
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.
The effect of electromagnetic interference must be reduced by using a noise filter or by other means.
Electromagnetic interference may be given to the electronic equipment used near the servo amplifier.
Burning or disassembling a servo amplifier may generate toxic gases. Do not burn or break it.
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.
(5) Corrective actions
CAUTION
Ensure safety by confirming the power off, etc. before performing corrective actions. Otherwise, it may
cause an accident.
When it is assumed that a hazardous condition may occur due to a power failure or product malfunction,
use a servo motor with an electromagnetic brake or external brake to prevent the condition.
Configure an electromagnetic brake circuit so that it is activated by an external EMG stop switch.
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before
restarting operation.
Provide an adequate protection to prevent unexpected restart after an instantaneous power failure.
B
U
Contacts must be opened with the ALM (malfunction)
off or the MBR (electromagnetic brake interlock) off.
Servo motor
Contacts must be opened with
the EMG stop switch.
Electromagnetic
brake
RA
24 V DC