Mitsubishi Electric MELSERVO-J4 Instruction Manual page 4

(2) Usage
Before resetting an alarm, make sure that the run signal of the servo amplifier (drive unit) is off in order to
prevent a sudden restart. Otherwise, it may cause an accident.
Use the servo amplifier (drive unit) and converter unit with the specified servo motor.
(3) Corrective actions
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 which is interlocked with an external emergency stop switch.
Contacts must be opened when CALM (Common
malfunction) or MBR (Electromagnetic brake
interlock) turns off.
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.
CAUTION
CAUTION
Servo motor
RA
B
Electromagnetic brake
A - 3
Contacts must be opened with
the emergency stop switch.
24 V DC