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11. OPTIONS AND PERIPHERAL EQUIPMENT
(3) Precautions for wiring
The cables between the servo amplifier and the brake unit, and between the resistor unit and the brake
unit should be as short as possible. Always twist the cable longer than 5 m (twist five times or more per
one meter). Even when the cable is twisted, the cable should be less than 10 m. Using cables longer
than 5 m without twisting or twisted cables longer than 10 m may result in the brake unit malfunction.
Servo amplifier
(4) Wires
(a) Wires for the brake unit
For the brake unit, HIV wire (600 V Grade heat-resistant polyvinyl chloride insulated wire) is
recommended.
1) Main circuit terminal
N/-
P/+
Terminal block
Brake unit
P+
P/+
P
N-
N/-
PR
5 m or less
5 m or less
Brake unit
PR
FR-BU2-15K
200 V
class
FR-BU2-30K
FR-BU2-55K
FR-BU2-H30K
400 V
class
FR-BU2-H55K
FR-BU2-H75K
Servo amplifier
Resistor unit
P
PR
Crimp
Main
terminal
circuit
terminal
N/-, P/+,
screw
PR,
size
M4
5.5-4
M5
5.5-5
M6
14-6
M4
5.5-4
M5
5.5-5
M6
14-6
11 - 28
Brake unit
Twist
Twist
P+
P/+
P
N-
N/-
PR
10 m or less
10 m or less
Wire size
Tightening
torque
N/-, P/+, PR,
[N•m]
HIV wire
2
[mm
]
1.5
3.5
2.5
5.5
4.4
14
1.5
3.5
2.5
5.5
4.4
14
Resistor unit
P
PR
AWG
12
10
6
12
10
6
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