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14. OPTIONS AND AUXILIARY EQUIPMENT
(3) Connection of the regenerative option
Set parameter No. PA02 according to the open to be used.
Parameter No. PA02
(4) Connection of the regenerative option
The regenerative option will generate heat of about 100 . Fully examine heat dissipation, installation
position, used cables, etc. before installing the option. For wiring, use flame-resistant cables 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-J3-350T 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.
Note 1. When using the MR-RB50, forcibly cool it with a cooling fan (1.0m
Selection of regenerative
00: Regenerative option is not used
For MR-J3-10T, regenerative resistor is not used.
For MR-J3-20T or more 700T or less, built-in regenerative resistor
is used.
Supplied regenerative resistors or regenerative option is used with
the MR-J3-11KT or more servo amplifier.
01: MR-BU MR-RC FR-CV
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50
08: MR-RB31
09: MR-RB51
FA: When regenerative resistors or regenerative option supplied to the
MR-J3-11KT or more are cooled by fans to increase capability.
POINT
When the MR-RB50 MR-RB51 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 14.9.
Always remove the lead from across P-D.
Servo amplifier
P
C
D
(Note2)
5m (16.4 ft) max.
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
Regenerative option
P
C
G3
G4
Fan (Note 1)
14 - 20
/min, 92 or so).
3
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