Mitsubishi Electric MELSERVO-JN Series, Instruction Manual

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(4) Usage
CAUTION
Configure an external emergency stop circuit in order to stop the operation immediately and shut off the
power.
Do not disassemble or repair the equipment.
If an alarm is reset while the operation signal is input to the servo amplifier, the equipment starts
suddenly. Be sure that the operation signal is off before resetting the alarm to prevent an accident.
Do not modify the equipment.
Electromagnetic interference from the servo amplifier may affect the surrounding electronic equipment.
Minimize the influence of the electromagnetic interference by using a noise filter, etc.
Toxic gases may be generated by burning or disassembling the servo amplifier. Do not burn or
disassemble the 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.
(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 take place at the occur due to a power failure or a
product fault, use a servo motor with an electromagnetic brake or provide an external brake mechanism
for the purpose of prevention.
Configure the electromagnetic brake operation circuit which interlocks with an external emergency stop
switch.
SON RA
Servo motor
Electromagnetic brake
B
Shut off the servo motor when the Servo-on
(SON), the Malfunction (ALM), or the
Electromagnetic brake interlock (MBR)
are turned OFF.
24VDC
Circuit must be opened with the
emergency stop switch.
When an alarm occurs, remove its cause. Then, ensure safety and reset the alarm before restarting
operation.
Provide an adequate protection to prevent unexpected restart after an instantaneous power failure.