Mitsubishi Electric MELSERVO-J3 Series Instruction Manual page 443

14. OPTIONS AND AUXILIARY EQUIPMENT
(b) MR-J3-350T4 MR-J3-500T(4) MR-J3-700T(4)
Always remove the wiring (across P-C) of the servo amplifier built-in regenerative resistor and fit the
regenerative option across P-C.
The G3 and G4 terminals act as a thermal sensor. G3-G4 is opened when the regenerative option
overheats abnormally.
When using the regenerative option, remove the servo amplifier's built-in regenerative resistor wires
(across P-C), fit them back to back, and secure them to the frame with the accessory screw as shown
below.
Mounting method
Accessory screw
Always remove wiring (across P-C) of servo
amplifier built-in regenerative resistor.
Servo amplifier
P
C
5m or less
Note 1. When using the MR-RB51, MR-RB3G-4, MR-RB5G-4, MR-RB34-4 or MR-RB54-4,
forcibly cool it with a cooling fan (92 92, minimum air flow : 1.0m
2. Make up a sequence which will switch off the magnetic contactor when abnormal heating
occurs.
G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5A/4.8VDC
Maximum capacity: 2.4VA
14 - 34
Regenerative option
P
C
G3
(Note 2)
G4
Cooling fan (Note 1)
3
).