Mitsubishi Electric MELSERVO-J2 Series Instruction Manual page 230

14. OPTIONS AND AUXILIARY EQUIPMENT
Subtract the capacitor charging from the result of multiplying the sum total of regenerative energies by
the inverse efficiency to calculate the energy consumed by the regenerative brake option.
Calculate the power consumption of the regenerative brake option on the basis of single-cycle operation
period tf [s] to select the necessary regenerative brake option
(3) Connection of the regenerative brake option
When using the regenerative brake option, always remove wiring from across P-D and install the
regenerative brake option across P-C. Set parameter No.0 according to the option to be used. The
regenerative brake option will generate heat of about 100°C. Fully examine heat dissipation,
installation position, used cables, etc. before installing the option. For wiring, use fire-retarding cables
and keep them clear of the regenerative brake option body. Always use twisted cables of max. 5m
(16.4ft) length for connection with the servo amplifier.
The G3 and G4 terminals act as a thermal sensor. G3-G4 are disconnected when the regenerative
brake option overheats abnormally.
Parameter No.0
Selection of regenerative
0: Not used.
2: MR-RB 032
3: MR-RB 12
4: MR-RB 32
5: MR-RB 30
6: MR-RB 50
Servo amplifier
Note: 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
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ER [J]
PR [W]
POINT
When the MR-RB50 is used, a fan is required to cool it. The cooling fan
should be prepared by the customer.
For the sizes of wires used for wiring, refer to Section 14.2.1.
Always remove the lead from across P-D.
Regenerative brake option
D
P
P
C
C
G3
(Note)
G4
5m (16.4 ft) max.
search engine
Es – Ec
ER/tf ............................................................................................(14.1)
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