Instruction manual

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11. OPTIONS AND AUXILIARY EQUIPMENT
(c) MR-J3-11KB(4) to MR-J3-22KB(4) (when using the supplied regenerative brake resistor)
When using the regenerative brake 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 brake
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
Fan
P
1
Do not remove
the short bar.
5m or less
Note. The number of resistors connected in series depends on the resistor type. The thermal sensor is not mounted on the
attached regenerative brake 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
Brake Resistor
Normal Cooling
Resistance
[
]
Number of
Resistors
MR-J3-11KB GRZG400-1.5 500 800 6 4
MR-J3-15KB GRZG400-0.9 850 1300 4.5 5
MR-J3-22KB GRZG400-0.6 850 1300 3 5
MR-J3-11KB4 GRZG400-5.0 500 800 20 4
MR-J3-15KB4 GRZG400-2.5 850 1300 12.5 5
MR-J3-22KB4 GRZG400-2.0 850 1300 10 5