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(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 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.
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 ballscrew 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
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 electromagnetic brake or an external brake mechanism for the
purpose of prevention.
Configure the electromagnetic brake circuit so that it is activated not only by the servo amplifier
signals but also by an external emergency stop signal.
When any alarm has occurred, eliminate its cause, ensure safety, then reset the alarm, before
restarting operation.
When power is restored after an instantaneous power failure, keep away from the machine because
the machine may be restarted suddenly (design the machine so that it is secured against hazard if
restarted).
CAUTION
CAUTION
Contacts must be open when
servo is off or when an
alarm (trouble) is present.
5
Servo motor
RA1
EM1
Electromagnetic brake
Circuit must be
opened during
emergency stop.
24VDC
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