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14. OPTIONS AND AUXILIARY EQUIPMENT
(4) Connection of the regenerative option
POINT
When the MR-RB50 MR-RB51 is used, a cooling fan is required to cool it.
The cooling fan should be prepared by the customer.
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 (16.4ft) length for
connection with the servo amplifier.
(a) MR-J2S-350CP 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 opened 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) or less
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)]