MITSUBISHI ELECTRIC MELSERVO MR-J2S- A - Manual (Page 229)

13 - 4
13. OPTIONS AND AUXILIARY EQUIPMENT
(4) Connection of the regenerative brake option
POINT
When using the MR-RB50 and MR-RB51, cooling by a fan is required.
Please obtain a cooling fan at your discretion.
The regenerative brake option will cause a temperature rise of +100 (+212 ) degrees relative to the
ambient temperature. 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(16.4ft) length for connection with the servo
amplifier.
(a) MR-J2S-350A 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 opened when the regenerative brake
option overheats abnormally.
Servo amplifier
Regenerative brake option
Note 1. When using the MR-RB50, forcibly cool it with a cooling fan (1.0m 3 /min, 92 or so).
2. Make up a sequence which will switch off the magnetic contactor (MC) when
abnormal heating occurs.
(Note2)
5m (16.4 ft) max.
D
P
P
C
G3
G4
C
Always remove the lead from across P-D.
G3-G4 contact specifications
Maximum voltage: 120V AC/DC
Maximum current: 0.5A/4.8VDC
Maximum capacity: 2.4VA
Fan (Note 1)
For the MR-RB50 install the cooling fan as shown.
82.5 40 (1.58)
82
.5
13
3
Fan installation screw hole dimensions
2-M3 screw hole
(for fan installation)
Depth 10 or less
(Screw hole already
machined)
Recommended fan:
Toyo Denki's TL396A or equivalent
Fan Terminal block
Thermal relay
Installation surface Horizontal installation
Vertical
installation
Top
Bottom
(3
.25
)
(5
.24
)
(3.25)
[Unit : mm(in)]