Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual page 230

13. OPTIONS AND AUXILIARY EQUIPMENT
(b) MR-J2S-500A MR-J2S-700A
Always remove the wiring (across P-C) of the servo amplifier built-in regenerative brake resistor
and fit the regenerative brake option across P-C.
The G3 and G4 terminals act as a thermal sensor. G3-G4 are opened when the regenerative brake
option overheats abnormally.
Servo amplifier
P
C
Note 1. When using the MR-RB50 MR-RB51, forcibly cool it with a cooling fan (1.0m
2. Make up a sequence which will switch off the magnetic contactor (MC)
when abnormal heating occurs.
G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5A/4.8VDC
Maximum capacity: 2.4VA
When using the regenerative brake resistor option, remove the servo amplifier's built-in
regenerative brake resistor terminals (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
For MR-J2S-500A
Accessory screw
Always remove wiring (across P-C) of servo
amplifier built-in regenerative brake resistor.
Regenerative brake option
P
C
G3
(Note 2)
G4
5m(16.4ft) or less
Fan (Note 1)
For MR-J2S-700A
Accessory screw
13 - 5
3 /min, 92 or so).