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12. OPTIONS AND AUXILIARY EQUIPMENT
(4) Connection of the regenerative option
POINT
When the MR-RB50 MR-RB51 MR-RB3M-4 MR-RB3G-4 MR-RB5G-4
MR-RB34-4
MR-RB54-4 is used, a cooling 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 12.11.
The regenerative option will cause a temperature rise of 100
relative to the ambient temperature. Fully
examine heat dissipation, installation position, used cables, etc. before installing the option. For wiring, use
flame-resistant wire and keep them clear of the regenerative option body. Always use twisted cables of
max. 5m length for connection with the servo amplifier.
(a) MR-J3-350A or less
MR-J3-200A4 or less
Always remove the wiring from across P-D and fit the regenerative option across P-C.
The G3 and G4 terminals act as a thermal sensor. G3-G4 is disconnected when the regenerative option
overheats abnormally.
D
P
C
G4
G3
C
P
Regenerative option
5m or less
Servo amplifier
Always remove the lead from across P-D.
(Note 2)
Cooling fan
(Note 1)
Note 1. When using the MR-RB50, MR-RB3M-4, MR-RB3G-4 or MR-RB5G-4, forcibly
cool it with a cooling fan (92
92, minimum air flow: 1.0m
3
).
2. Make up a sequence which will switch off the magnetic contactor when abnormal
heating occurs.
G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5A/4.8VDC
Maximum capacity: 2.4VA
