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12. OPTIONS AND AUXILIARY EQUIPMENT
(b) MR-J2S-500B MR-J2S-700B
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 protector. G3-G4 are opened when the regenerative
brake option overheats abnormally.
P
P
C
G3
(Note 2)
5m(16.4ft) or less
G4
C
Servo amplifier
Always remove wiring (across P-C) of servo
amplifier built-in regenerative brake resistor.
Regenerative brake option
Fan (Note 1)
Note 1. When using the MR-RB50 MR-RB51, forcibly cool it with a cooling fan (1.0m
3
/min, 92 or so).
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 capacit
y
: 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-500B
For MR-J2S-700B
Accessory screw
Accessory screw