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10. OPTIONS AND AUXILIARY EQUIPMENT
(4) Connection of the regenerative brake option
Always supply single-phase 200VAC to the cooling fan. The cooling fan specifications are as follows.
Item
Specifications
Voltage, frequency
Single-phase 200VAC, 50/60Hz
Power consumption [W]
20(50Hz)/18(60Hz)
The regenerative brake option generates heat of 100 higher than the ambient temperature. Fully
consider heat dissipation, installation position, used wires, etc. to place the option. For wiring, use
flame-resistant wires or make the wires flame-resistant and keep them away from the regenerative
brake option. The G3 and G4 terminals act as a thermal sensor. G3-G4 are opened when the
regenerative brake option overheats abnormally.
Always twist the wires for connection with the converter unit and connect the wires within the overall
distance of 5m.
(a) MR-RB139
RA
G4
Converter unit
P1
P2
(Note1)
G3
P
C
P
C
OHS1
OHS2
R
S
Single-phase
200VAC
24VDC
power supply
Servo motor
Servo motor
thermal relay
Regenerative
brake
option
(Note2)
Power factor improving
DC reactor (Option)
5m (16.4ft) or less
Note 1. When using the Power factor improving DC reactor, remove the short bar across P1-P2.
2. G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5V/4.8VDC
Maximum capacity: 2.4VA
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