14 - 4
14. OPTIONS AND AUXILIARY EQUIPMENT
(4) Connection of the regenerative option
POINT
When using the MR-RB50 and MR-RB51, cooling by a cooling fan is
required. Please obtain a cooling fan at your discretion.
The regenerative option will cause a temperature rise of
100 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 option body.
Always use twisted cables of max. 5m(16.4ft) length for connection with the servo amplifier.
(a) MR-J2S-350CL 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 are disconnected when the regenerative
option overheats abnormally.
Servo amplifier
Regenerative option
Always remove the lead from across P-D.
D
P
C
G4
G3
(Note 2)
5m (16.4 ft) max.
Cooling fan(Note 1)
C
P
Note 1. When using the MR-RB50, 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 (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.
82.5 40 (1.58)
82.5133
Cooling fan installation screw hole dimensions
2-M3 screw hole
(for cooling fan installation)
Depth 10 or less
(Screw hole already
machined)
Cooling fan Terminal block
Thermal relay
Installation surface
Horizontal installation
Vertical
installation
Top
Bottom
(3.25)
(5.24)
(3.25)
[Unit : mm(in)]
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