Servo Parameter Setting; Connection Of Regenerative Option - Mitsubishi Electric Melservo-Jet MR-JET Series User Manual

Servo parameter setting

Set [Pr. PA02] according to the regenerative option to be used.
MR-JET-G User's Manual (Parameters)

Connection of regenerative option

If using a regenerative option with MR-JET-40_ to MR-JET-300_, remove the built-in regenerative resistor and
its wiring from the servo amplifier.
If using the MR-RB50, cool it with a cooling fan. The cooling fan should be prepared by the customer.
For the wire sizes, refer to the following.
Page 69 Selection example of wires
The built-in regenerative resistor should not be mounted/removed frequently.
When remounting the built-in regenerative resistor, check the lead wires of the regenerative resistor for
scratches or cracks.
The regenerative option generates heat that is 100 °C higher than the ambient temperature. Fully consider heat dissipation,
the installation position, wires used, and other relevant areas before installing the option. For wiring, use flame-retardant wires
or make the wires flame retardant, and do not let them touch the regenerative option. Use twisted wires with a maximum
length of 5 m for a connection with the servo amplifier.
Disconnect the wiring between P+ and C and remove the built-in regenerative resistor from the servo amplifier. Then, wire the
regenerative option between P+ and C. G3 and G4 are terminals for the thermal sensor. Between G3 and G4 opens if the
regenerative option overheats abnormally.
Disconnect between P+ and C terminals (the wiring for the built-in regenerative
resistor of the servo amplifier).
Servo amplifier
P+
C
*4
5 m or shorter
*1 If using the MR-RB50, forcibly cool it with a cooling fan (1.0 m
*2 If using the MR-RB30 or MR-RB34 with a regenerative load ratio of higher than 60 % and at an ambient temperature of above 55 °C,
forcibly cool the MR-RB30 or MR-RB34 with a cooling fan (1.0 m
ambient temperature is 35 °C or less. (A cooling fan is required for the shaded area in the following graph.)
100
60
A cooling fan is
not required.
0
0
Ambient temperature [°C]
*3 Configure 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
*4 MR-JET-10_ and MR-JET-20_ do not have a regenerative resistor.
6 OPTIONS AND PERIPHERAL EQUIPMENT
60
6.2 Regenerative option
Regenerative option
P
C
G3
*3
G4
*1*2
Cooling fan
A cooling fan is required.
35 55
3
/min or more, 92 mm × 92 mm).
3
/min or more, 92 mm × 92 mm). A cooling fan is not required if the