MITSUBISHI ELECTRIC Merservo MR-J2S- B - Manual (Page 179)

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12. OPTIONS AND AUXILIARY EQUIPMENT
12.1.4 External dynamic brake
POINT
Configure up a sequence which switches off the contact of the brake unit
after (or as soon as) it has turned off the servo on signal at a power failure
or failure.
For the braking time taken when the dynamic brake is operated, refer to
section 13.3.
The brake unit is rated for a short duration. Do not use it for high duty.
(1) Selection of 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 if required. Set " 1
" in the parameter
No. 2.
Servo amplifier Dynamic brake
MR-J2S-11KB DBU-11K
MR-J2S-15KB DBU-15K
MR-J2S-22KB DBU-22K