Mitsubishi Electric MR-J4W2, Instruction Manual

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11. OPTIONS AND AUXILIARY EQUIPMENT
11 - 12
11.2.4 Connection of regenerative option
POINT
For the sizes of wires used for wiring, refer to section 11.5.
The regenerative option generates heat of 100
˚ C higher than the ambient temperature. Fully consider heat
dissipation, installation position, wires used, etc. before installing the option. For wiring, use flame-resistant
wires or make the wires flame-resistant and keep them away from the regenerative option. Always use
twisted cables of max. 5 m length for connection with the servo amplifier.
Connect the regenerative option to P+ and C. G3 and G4 are thermal sensor's terminals. Between G3 and
G4 is opened when the regenerative option overheats abnormally.
D
P+
C
G4
G3
C
P
Regenerative option
5 m or less
Servo amplifier
Always remove wiring across P+ - D.
(Note 2)
Cooling fan
(Note 1)
Note 1. When the ambient temperature is more than 55 °C and the regenerative load ratio
is more than 60% in MR-RB34 and MR-RB3N, forcefully cool the air with a
cooling fan (1.0 m
3
/min or more, 92 mm × 92 mm). A cooling fan is not required if
the ambient temperature is 35 °C or less. (A cooling fan is required for the
shaded area in the following graph.)
100
60
0
0
Ambient temperature [ ]
35 55
A cooling fan is
not required.
A cooling fan is required.
Load r
atio [%]
A cooling fan is not required for MR-RB14.
2. Make up a sequence which will switch off the magnetic contactor when abnormal
heating occurs.
G3-G4 contact specifications
Maximum voltage: 120 V AC/DC
Maximum current: 0.5 A/4.8 V DC
Maximum capacity: 2.4 VA