Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

Page: 355 / 646

11 OPTIONS AND PERIPHERAL EQUIPMENT
11.3 FR-BU2-(H) brake unit
353
11
11.3
FR-BU2-(H) brake unit
• Use a 200 V class brake unit and a resistor unit with a 200 V class servo amplifier, and a 400 V class brake
unit and a resistor unit with a 400 V class servo amplifier. Combination of different voltage class units cannot
be used.
• When a brake unit and a resistor unit are installed horizontally or diagonally, the heat dissipation effect
diminishes. Install them on a flat surface vertically.
• The temperature of the resistor unit case will be higher than the ambient temperature by 100

or over.
Keep cables and flammable materials away from the case.
• Ambient temperature condition of the brake unit is between -10

and 50

. Note that the condition is
different from the ambient temperature condition of the servo amplifier (between 0

and 55

).
• Configure the circuit to shut down the power-supply with the alarm output of the brake unit and the resistor
unit under abnormal condition.
• Use the brake unit with a combination indicated in the following section.

Page 353 Selection
• For executing a continuous regenerative operation, use FR-RC-(H) power regeneration converter or FR-
CV-(H) power regeneration common converter.
• Brake unit and regenerative options (Regenerative resistor) cannot be used simultaneously.
Connect the brake unit to the bus of the servo amplifier. As compared to the MR-RB regenerative option, the brake unit can
return larger power. Use the brake unit when the regenerative option cannot provide sufficient regenerative capability.
When using the brake unit, set [Pr. PA02] to "_ _ 0 1".
When using the brake unit, always refer to the FR-BU2 Instruction Manual.
Selection
Use a combination of servo amplifier, brake unit and resistor unit listed below.
*1 Only when using servo motor HG-RR353/HG-UR352
*2 When HG-JR11K1M4 servo motor is used, limit the torque during power running to 180% or less, or the servo motor speed to 1800 r/min
or less.
*3 When the brake unit is selected by using the capacity selection software, a brake unit other than the combinations listed may be shown.
Refer to the combinations displayed on the capacity selection software for detailed combinations.
Brake unit Resistor unit Number of
connected
units Permissible
continuous power
[kW] Resultant
resistance [

]
Applicable servo
amplifier
*3
200 V class FR-BU2-15K FR-BR-15K 1 0.99 8 MR-J4-500GF(-RJ)
*1
2 (parallel) 1.98 4 MR-J4-500GF(-RJ)
MR-J4-700GF(-RJ)
MR-J4-11KGF(-RJ)
MR-J4-15KGF(-RJ)
FR-BU2-30K FR-BR-30K 1 1.99 4 MR-J4-500GF(-RJ)
MR-J4-700GF(-RJ)
MR-J4-11KGF(-RJ)
MR-J4-15KGF(-RJ)
FR-BU2-55K FR-BR-55K 1 3.91 2 MR-J4-11KGF(-RJ)
MR-J4-15KGF(-RJ)
MR-J4-22KGF(-RJ)
MT-BR5-55K 1 5.5 2 MR-J4-22KGF(-RJ)
400 V class FR-BU2-H30K FR-BR-H30K 1 1.99 16 MR-J4-500GF4(-RJ)
MR-J4-700GF4(-RJ)
MR-J4-11KGF4(-RJ)
*2
FR-BU2-H55K FR-BR-H55K 1 3.91 8 MR-J4-11KGF4(-RJ)
MR-J4-15KGF4(-RJ)
MR-J4-22KGF4(-RJ)
FR-BU2-H75K MT-BR5-H75K 1 7.5 6.5 MR-J4-22KGF4(-RJ)