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12. OPTIONS AND AUXILIARY EQUIPMENT
The cables between the servo amplifier and brake unit and between the resistor unit and brake unit
should be as short as possible. The cables longer than 5m(16.404ft) should be twisted. If twisted, the
cables must not be longer than 10m(32.808ft).
The cable size should be equal to or larger than the recommended size. See the brake unit instruction
manual. You cannot connect one set of brake unit to two servo amplifiers or two sets of brake units to
one servo amplifier.
P
N
PR
P
N
PP
PR
P
PR
PR
PP
N
P
N
Servo amplifier Servo amplifier
Brake unit
Resistor unit
5m (16.404ft)
or less
5m (16.404ft)
or less
10m (32.808ft)
or less
10m (32.808ft)
or less
Brake unit
Twist. Twist.
Resistor uni
t
(3) Outside dimensions
(a) Brake unit (FR-BU)
[Unit : mm(in)]
D
K
F
BA
B
E
AA
A
C
E
EE
F
K
(Note)
Control circuit
terminals
Main circuit
terminals
Operation
display
Note: Ventilation ports are provided in both side faces and top face. The bottom face is open.
Brake Unit A AA B BA C D E EE K F
Approx.
Mass [kg(Ib)]
FR-BU-15K
100
(3.937)
60
(2.362)
240
(9.446)
225
(10.039)
128
(5.039)
6
(0.236)
18.5
(0.728)
6
(0.236)
48.5
(1.909)
7.5
(0.295)
2.4
(5.291)
FR-BU-30K
160
(6.299)
90
(3.543)
240
(9.446)
225
(10.039)
128
(5.039)
6
(0.236)
33.5
(1.319)
6
(0.236)
78.5
(3.091)
7.5
(0.295)
3.2
(7.055)
FR-BU-55K
265
(10.433)
145
(5.709)
240
(9.446)
225
(10.039)
128
(5.039)
58.6
(2.307)
6
(0.236)
7.5
(0.295)
5.8
(12.787)