Instruction manual

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11. OPTIONS AND AUXILIARY EQUIPMENT
(3) Connection of the regenerative brake option
Set parameter No. PA02 according to the open to be used.
Parameter No. PA02
Selection of regenerative
00: Regenerative brake option is not used
For MR-J3-10B, regenerative brake resistor is not used.
For MR-J3-20B or more 700B or less, built-in regenerative
brake resistor is used.
Supplied regenerative brake resistors or regenerative
brake option is used with the MR-J3-11KB(4) or more servo
amplifier.
01: MR-BU(-H) MR-RC
(-H) FR-CV(-H)
02: MR-RB032
03: MR-RB12
04: MR-RB32
05: MR-RB30
06: MR-RB50
08: MR-RB31
09: MR-RB51
FA: When regenerative brake resistors or regenerative brake option supplied
to the MR-J3-11KB(4) or more are cooled by fans to increase capability.
(4) Connection of the regenerative brake option
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 11.11.
The regenerative brake 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 brake option body. Always use twisted cables of max. 5m length for connection
with the servo amplifier.
(a) MR-J3-350B or less
Always remove the wiring from across P-D and fit the regenerative brake option across P-C.
The G3 and G4 terminals act as a thermal sensor. G3-G4 are disconnected when the regenerative
brake option overheats abnormally.
D
P
C
G4
G3
C
P
Servo amplifier
Regenerative brake option
(Note2)
5m max.
Always remove the lead from across P-D.
Fan (Note 1)
Note 1. When using the MR-RB50, forcibly cool it with a cooling fan (1.0m3/min,
92 or so).
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