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10. OPTIONS AND AUXILIARY EQUIPMENT
10.2.2 External dynamic brake (400V class)
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 (son) at a power failure
or failure.
For the braking time taken when the dynamic brake is operated, refer to
Section 9.3.
The brake unit is rated for a short duration. Do not use it for high duty.
The specifications of the input power supply for external dynamic brake
are the same as those of the converter unit control circuit power supply.
(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.
The corresponding parameter value must be set to use the external dynamic brake. For parameter
settings, refer to the External dynamic brake section of the corresponding Servo Amplifier Instruction
Manual since they are the same as those of the 11k to 22kW servo amplifiers.
Servo Amplifier
Converter unit
Dynamic Brake
MR-JS-30KA4/B4 MR-H30KAN4/BN4
MR-JS-37KA4/B4 MR-H37KAN4/BN4
MR-JS-45KA4/B4 MR-H45KAN4/BN4
MR-JS-55KA4/B4 MR-H55KAN4/BN4
MR-HP55KA4
DBU-55K-4
(2) Connection example
Use the following wires to connect the dynamic brake.
Wire[mm
2
]
Dynamic
Brake
a b
U V W
DBU-55K-4
2
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