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11. Options and peripheral devices
(2) MR-J4-700B
Always remove the wiring (across P+ - C) of the servo amplifier built-in regenerative resistor and fit the
regenerative option across P+ - C. G3 and G4 are thermal sensor's terminals. Between G3 and 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.
Always remove wiring (across P+ - C) of servo
amplifier built-in regenerative resistor.
Servo amplifier
P+
C
(Note2)
5 m or less
Note 1. When using the MR-RB51, forcibly cool it with a cooling fan (92 mm × 92 mm,
minimum air flow: 1.0 m
2. Make up a sequence which will switch off the magnetic contactor when abnormal
heating occurs.
G3-G4 contact specifications
Maximum voltage: 120 V AC/DC
Maximum current: 0.5 A/4.8 V DC
Maximum capacity: 2.4 VA
Accessory screw
Built-in regenerative resistor
lead terminal fixing screw
11 - 13
Regenerative option
P
C
G3
G4
(Note1)
Cooling fan
3
/min).
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