Instruction manual

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11. OPTIONS AND AUXILIARY EQUIPMENT
For the MR-RB50 install the cooling fan as shown.
82.5 40
82.5
133
Fan installation screw hole dimensions
2-M3 screw hole
(for fan installation)
Depth 10 or less
(Screw hole already
machined)
Recommended fan:
Toyo Denki's TL396A or equivalent
Fan Terminal block
Thermal relay
Installation surface
Horizontal installation
Vertical
installation
Top
Bottom
[Unit : mm]
(b) MR-J3-500B MR-J3-700B
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 sensor. 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-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 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