Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 363

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.
Servo amplifier
Brake unit
P/+ P
P+
N- N/- PR
5 m or less 5 m or less
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
N/- P/+ PR
Terminal block
Brake unit
200 V class FR-BU2-15K
FR-BU2-30K
FR-BU2-55K
400 V class FR-BU2-H30K
FR-BU2-H55K
FR-BU2-H75K
• 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.
SD
RES
PC SD
BUE
A B C
Jumper
Terminal block
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
2
Wire size: 0.3 mm to 0.75 mm
Screw driver: Small flat-blade screwdriver (Tip thickness: 0.4 mm/Tip width 2.5 mm)
Servo amplifier
Resistor unit
P
PR
Main circuit Crimp terminal
terminal screw
N/-, P/+, PR,
size
M4 5.5-4
M5 5.5-5
M6 14-6
M4 5.5-4
M5 5.5-5
M6 14-6
SD SD
MSG MSG
2
Brake unit Resistor unit
Twist Twist
P/+ P
P+
N- N/- PR
10 m or less 10 m or less
Tightening torque
[N•m]
1.5
2.5
4.4
1.5
2.5
4.4
Insulator
Core
6 mm
11 OPTIONS AND PERIPHERAL EQUIPMENT
P
PR
Wire size
N/-, P/+, PR,
2
HIV wire [mm ] AWG
3.5 12
5.5 10
14 6
3.5 12
5.5 10
14 6
11.3 FR-BU2-(H) brake unit
11
361