12 - 28
12. OPTIONS AND AUXILIARY EQUIPMENT
(c) MR-J3-11KA(4) to MR-J3-22KA(4) (when using the supplied regenerative resistor)
When using the regenerative resistors supplied to the servo amplifier, the specified number
of resistors (4 or 5 resistors) must be connected in series. If they are connected in parallel or in less
than the specified number, the servo amplifier may become faulty and/or the regenerative resistors
burn. Install the resistors at intervals of about 70mm. Cooling the resistors with fans
(1.0m
3
/min, 92 ( about two fans) improves the regeneration capability. In this case, set " FA"
in parameter No. PA02.
P
C
Servo amplifier
(Note) Series connection
P
1
Do not remove
the short bar.
5m or less
Cooling fan
Note. The number of resistors connected in series depends on the resistor type. The thermal sensor is not mounted on the
attached regenerative resistor. An abnormal heating of resistor may be generated at a regenerative circuit failure. Install a
thermal sensor near the resistor and establish a protective circuit to shut off the main circuit power supply when abnormal
heating occurs. The detection level of the thermal sensor varies according to the settings of the resistor. Set the thermal
sensor in the most appropriate position on your design basis or use the thermal sensor built-in regenerative option (MR-
RB5E, 9P, 9F, 6B-4, 60-4 and 6K-4) provided by Mitsubishi Electric Corporation.
Regenerative Power [W]
Servo Amplifier
Regenerative
Resistor
Normal Cooling
Resistance
[ ]
Number of
Resistors
MR-J3-11KA GRZG400-1.5 500
800
6
4
MR-J3-15KA GRZG400-0.9 850
1300
4.5
5
MR-J3-22KA GRZG400-0.6 850
1300
3
5
MR-J3-11KA4 GRZG400-5.0 500
800
20
4
MR-J3-15KA4 GRZG400-2.5 850
1300
12.5
5
MR-J3-22KA4 GRZG400-2.0 850
1300
10
5
Summary of Contents for MELSERVO MR-J3 A Series
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Page 225: ...7 12 7 GENERAL GAIN ADJUSTMENT MEMO ...
Page 241: ...8 16 8 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 251: ...9 10 9 TROUBLESHOOTING MEMO ...
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