Mitsubishi Electric MR-J3-10B Instruction Manual page 185

11. OPTIONS AND AUXILIARY EQUIPMENT
(4) Connection of the regenerative brake option
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
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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.
Servo amplifier
P
C
D
Note 1. When using the MR-RB50, forcibly cool it with a cooling fan (1.0m3/min,
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
For the MR-RB50 install the cooling fan as shown.
Vertical
installation
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 11.8.
Always remove the lead from across P-D.
Regenerative brake option
P
C
G3
(Note2)
G4
5m max.
Fan (Note 1)
Top
Fan
Bottom
Horizontal installation
92 or so).
Terminal block
Thermal relay
Recommended fan:
Installation surface
11 - 22
[Unit : mm]
Fan installation screw hole dimensions
2-M3 screw hole
(for fan installation)
Depth 10 or less
(Screw hole already
machined)
82.5 40
Toyo Denki's TL396A or equivalent