Mitsubishi Electric MELSERVO-J2S Series Transition Handbook page 526

[Appendix 1] Summary of MR-J4_B_-RJ020 + MR-J4-T20
(2) MR-J4-700B-RJ020/MR-J4-500B4-RJ020/MR-J4-700B4-RJ020
Remove the wiring (between P+ and C) for the regenerative resistor built into the servo amplifier and
install the regenerative option between P+ and C. The G3 and the G4 terminals are thermal sensors.
Abnormal overheating of the regenerative option causes the contact between G3 and G4 to open.
When you use the regenerative option, remove the wiring (between P+ and C) for the regenerative
resistor built into the servo amplifier, place back to back as shown in the diagram below and secure to
the frame using the supplied screw.
Make sure to remove the wiring (between P+ and C) for the regenerative
resistor built in to the servo amplifer.
Servo amplifier
P+
C
(Note 2)
5 m or lower
Note 1. When using MR-RB51, MR-RB34-4, MR-RB54-4, MR-RB3G-4 and MR-RB5G-4,
perform forced cooling using the cooling fan (1.0 ㎥/min or more, 92 mm square).
2. Configure sequence of shutting off the electromagnetic contactor when abnormal
heating is caused.
Specifications for contacts between G3 and G4
Maximum voltage: 120 V AC/DC
Maximum current: 0.5 A/4.8 V DC
Maximum capacity: 2.4 VA
Built-in regenerative resistor
内蔵回生抵抗器
Screw for securing lead terminal
リード端子固定用ねじ
Appendix 1-63
Regenerative option
P
C
G3
G4
(Note 1)
Cooling fan
Supplied screw
付属ねじ