Brake Unit - Mitsubishi Electric MELSERVO-J2-Super Series Instruction Manual

15. OPTIONS AND AUXILIARY EQUIPMENT

15.1.2 Brake unit

The brake unit is the integration of the regenerative control and resistor and is connected to the bus
(across P-N) of the servo amplifier. As compared to the MR-RB regenerative brake option, the brake unit
can return larger power. Hence, use the this brake unit when the MR-RB cannot provide sufficient
regenerative brake capability.
When using the brake unit, set "01
(1) Selection
Brake unit Resistor unit
FR-BU-15K FR-BR-15K
FR-BU-30K FR-BR-30K
(2) Connection example
No-fuse breaker
NFB
Power
supply
3-phase
200 to
230VAC
Note 1. Make up the external sequence to switch the power off when an alarm occurs or when the thermal relay is actuated.
2. Always remove the wiring (across P-C) of the servo amplifier built-in resistor.
POINT
The brake unit and resistor unit of other than 200V class are not
applicable to the servo amplifier.
The brake unit and resistor unit of the same capacity must be combined.
The units of different capacities may result in damage.
The brake unit and resistor unit must be installed on a vertical surface in
the vertical direction. If they are installed in the horizontal direction or on
a horizontal surface, a heat dissipation effect reduces.
The temperature of the resistor unit casing rises to higher than 100 . Do
not cause cables and combustibles to make contact with the casing.
" in parameter No. 0.
Permissible continuous
power [kw]
0.99
1.99
Servo amplifier
MC
L
U
1
L
V
2
L
W
3
L
11
L
21
(Note 2)
P
C
N
Max. instantaneous
power [kw]
16.5
33.4
Servo motor
SM
P/ PR
N/
(Note 1)
HA
HB
HC
FR-BU brake unit
15 - 8
Applicable servo amplifier
MR-J2S-500CP-S084
MR-J2S-700CP-S084
PR
P
Alarm
output
THS
FR-BR resistor unit
(Note 1)
TH1
TH2