Selection Of Regenerative Option - Mitsubishi Electric MELSERVO-J4 Instruction Manual

9. OPTIONS AND PERIPHERAL EQUIPMENT

9.2.4 Selection of regenerative option

The regenerative option generates heat of 100 ˚C higher than the ambient temperature. Fully consider heat
dissipation, installation position, wires used, etc. before installing the option. For wiring, use flame-resistant
wires or make the wires flame-resistant and keep them away from the regenerative option. Always use
twisted cables of max. 5 m length for connection with the servo amplifier.
(1) MR-J4-350A4(-RJ) or less/MR-J4-350B4(-RJ) or less
Always remove the wiring from across P+ to D and fit the regenerative option across P+ to C. G3 and
G4 are thermal sensor's terminals. Between G3 and G4 is opened when the regenerative option
overheats abnormally.
POINT
MR-RB3M-4, MR-RB3G-4, MR-RB5G-4, MR-RB34-4, MR-RB54-4, MR-RB5K-4,
or MR-RB6K-4 is used, a cooling fan is required to cool it. The cooling fan
should be prepared by the customer.
For the wire sizes used for wiring, refer to section 9.6.
Always disconnect between P+ and D terminals.
Servo amplifier
P+
C
D
Note 1. When using the MR-RB3M-4, MR-RB3G-4, or MR-RB5G-4, forcibly cool it with a
cooling fan (92 × 92, minimum air flow: 1.0 m
2. Make up a sequence which will switch off the magnetic contactor when abnormal
heating occurs.
G3-G4 contact specifications
Maximum voltage: 120 V AC/DC
Maximum current: 0.5 A/4.8 V DC
Maximum capacity: 2.4 VA
Regenerative option
P
C
G3
(Note 2)
G4
5 m or shorter
Cooling fan
9 - 12
(Note 1)
3
).