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14. OPTIONS AND AUXILIARY EQUIPMENT
For the MR-RB50 install the cooling fan as shown.
Vertical
installation
(b) MR-J3-500T MR-J3-700T
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.
Servo amplifier
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 resistor option, remove the servo amplifier's built-in regenerative 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
Top
Fan
Bottom
Horizontal installation
Always remove wiring (across P-C) of servo
amplifier built-in regenerative resistor.
Regenerative option
P
P
C
C
G3
(Note 2)
G4
5m or less
Fan (Note 1)
Terminal block
Thermal relay
Installation surface
14 - 21
Fan installation screw hole dimensions
2-M3 screw hole
(for fan installation)
Depth 10 or less
(Screw hole already
82.5
40
Recommended fan:
Toyo Denki's TL396A or equivalent
/min, 92 or so).
3
[Unit : mm]
machined)
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