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14. OPTIONS AND AUXILIARY EQUIPMENT
14.6 External dynamic brake
CAUTION
For the MR-J3-11KT(4) to MR-J3-22KT(4) servo amplifiers, use an external
dynamic brake. When not using the external dynamic brake, the servo motor will
not stop immediately but coasts, and this may cause an accident. Ensure the
safety in the entire equipment.
POINT
Configure a sequence which switches off the magnetic contactor of the
external dynamic brake after (or as soon as) the servo-on (RYn0) has been
turned off at a power failure or a malfunction.
For the braking time taken when the external dynamic brake is operated, refer
to section 13.3.
The external dynamic brake is rated for a short duration. Do not use it for high
duty.
When using the 400V class dynamic brake, the power supply voltage is
restricted to 1-phase 380VAC to 463VAC (50Hz/60Hz).
Dynamic brake operates at occurrence of alarm, servo forced stop warning
(AE6), and when the power is turned off. The dynamic brake is an emergency
stop-use function, so do not use it for normal stop.
For a machine operating at the recommended load to motor inertia ratio or
less, the estimated number of usage times of the dynamic brake is 1000
times while the machine decelerates from the rated speed to a stop once in
10 minutes.
Be sure to enable Forced stop (EMG) after the servo motor stops when using
Forced stop (EMG) frequently in other than emergency.
(1) Selection of external dynamic brake
The dynamic brake is designed to bring the servo motor to a sudden stop when a power failure occurs
or the protective circuit is activated, and is built in the 7kW or less servo amplifier. Since it is not built
in the 11kW or more servo amplifier, purchase it separately. Assign the dynamic brake interlock (DB) to any
of CN6-14, CN6-15, and CN6-16 pins in parameter No.PD09, PD10 or PD11.
Servo amplifier
External dynamic brake
MR-J3-11KT DBU-11K
MR-J3-15KT DBU-15K
MR-J3-22KT DBU-22K
MR-J3-11KT4 DBU-11K-4
MR-J3-15KT4
DBU-22K-4
MR-J3-22KT4
Summary of Contents for Melservo-J3 Series MR-J3-B
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Page 55: ...1 36 1 FUNCTIONS AND CONFIGURATION MEMO ...
Page 61: ...2 6 2 INSTALLATION MEMO ...
Page 179: ...4 58 4 SIGNALS AND WIRING MEMO ...
Page 241: ...5 62 5 OPERATION MEMO ...
Page 357: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 385: ...11 28 11 TROUBLESHOOTING MEMO ...
Page 397: ...12 12 12 OUTLINE DRAWINGS MEMO ...
Page 755: ...17 70 17 SPEED CONTROL OPERATION MEMO ...
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