Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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11 OPTIONS AND PERIPHERAL EQUIPMENT
11.3 FR-BU2-(H) brake unit
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11
Precautions for wiring
Keep the wires between the servo amplifier and the brake unit, and between the resistor unit and the brake unit as short as
possible. For wires longer than 5 m, twist the wires five times or more per meter. The wires should not exceed 10 m even
when the wires are twisted. If wires exceeding 5 m without twisted or exceeding 10 m with or without twisted are used, the
brake unit may malfunction.
Wires
■ Wires for the brake unit
For the brake unit, HIV wire (600 V Grade heat-resistant polyvinyl chloride insulated wire) is recommended.
• Main circuit terminal
• Control circuit terminal
Under tightening can cause a cable disconnection or malfunction. Over tightening can cause a short circuit or
malfunction due to damage to the screw or the brake unit.
Wire the stripped cable after twisting to prevent the cable from becoming loose. In addition, do not solder it.
Screw size: M3
Tightening torque: 0.5 N•m to 0.6 N•m
Wire size: 0.3 mm
2
to 0.75 mm
2
Screw driver: Small flat-blade screwdriver (Tip thickness: 0.4 mm/Tip width 2.5 mm)
Brake unit Main circuit
terminal screw
size Crimp terminal Tightening torque
[N•m] Wire size
N/-, P/+, PR, N/-, P/+, PR,
HIV wire [mm
2
] AWG
200 V class FR-BU2-15K M4 5.5-4 1.5 3.5 12
FR-BU2-30K M5 5.5-5 2.5 5.5 10
FR-BU2-55K M6 14-6 4.4 14 6
400 V class FR-BU2-H30K M4 5.5-4 1.5 3.5 12
FR-BU2-H55K M5 5.5-5 2.5 5.5 10
FR-BU2-H75K M6 14-6 4.4 14 6
Servo amplifier
Brake unit
5 m or less 5 m or less
Servo amplifier
Brake unit
10 m or less 10 m or less
P+
N- P/+
N/- P
PR
P
PR P/+
N/- P
PR
P
PR
Twist Twist
Resistor unit Resistor unit
P+
N-
N/- P/+ PR
Terminal block
A
RES
PC
B
SD
BUE
C
MSG
SD
MSG
SD SD
Jumper
Terminal block
Insulator
Core
6 mm