Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 9

[Corrective actions]
CAUTION
● Ensure safety by confirming the power off, etc. before performing corrective actions. Otherwise, it may
cause an accident.
● If it is assumed that a power failure, machine stoppage, or product malfunction may result in a
hazardous situation, use a servo motor with an electromagnetic brake or provide an external brake
system for holding purpose to prevent such hazard.
● Configure an electromagnetic brake circuit which is interlocked with an external emergency stop
switch.
Contacts must be opened when ALM
(Malfunction) or MBR (Electromagnetic
brake interlock) turns off.
● When an alarm occurs, eliminate its cause, ensure safety, and deactivate the alarm to restart
operation.
● If the molded-case circuit breaker or fuse is activated, be sure to remove the cause and secure safety
before switching the power on. If necessary, replace the servo amplifier and recheck the wiring.
Otherwise, it may cause smoke, fire, or an electric shock.
● Provide an adequate protection to prevent unexpected restart after an instantaneous power failure.
● After an earthquake or other natural disasters, ensure safety by checking the conditions of the
installation, mounting, wiring, and equipment before switching the power on to prevent an electric
shock, injury, or fire.
[Maintenance, inspection and parts replacement]
CAUTION
● Make sure that the emergency stop circuit operates properly such that an operation can be stopped
immediately and a power is shut off by the emergency stop switch.
● It is recommended that the servo amplifier be replaced every 10 years when it is used in general
environment.
● When using the servo amplifier that has not been energized for an extended period of time, contact
your local sales office.
[General instruction]
● To illustrate details, the equipment in the diagrams of this Instruction Manual may have been drawn
without covers and safety guards. When the equipment is operated, the covers and safety guards
must be installed as specified. Operation must be performed in accordance with this Instruction
Manual.
Servo motor
RA
B
U
Electromagnetic brake
Contacts must be opened with
the emergency stop switch.
24 V DC
7