Mitsubishi Electric MR-J2S-*B Series Instruction Manual page 163

12. OPTIONS AND AUXILIARY EQUIPMENT
For the MR-RB50 MR-RB51 install the cooling fan as shown.
Top
Bottom
Vertical
installation
(c) MR-J2S-11KB to MR-J2S-22KB (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 /min, 92 ( about two fans) improves the regeneration capability. In this case, set "0E
3
in parameter No. 2.
5m or less
Do not remove
the short bar.
(Note) Series connection
Fan
Note. The number of resistors connected in series depends on the resistor type. Install a thermal sensor or like to configure a circuit that
will shut off the main circuit power at abnormal overheat. The supplied regenerative brake resistor does not have a built-in thermal
sensor. If the regenerative brake circuit fails, abnormal overheat of the resistor is expected to occur. On the customer side, please
also install a thermal sensor for the resistor and provide a protective circuit that will shut off the main circuit power supply at
abnormal overheat. The detection level of the thermal sensor changes depending on the resistor installation method. Please
install the thermal sensor in the optimum position according to the customer's design standards, or use our regenerative brake
option having built-in thermal sensor (MR-RB65, 66, 67).
Servo Amplifier
MR-J2S-11KB
MR-J2S-15KB
MR-J2S-22KB GRZG400-0.8
Fan
Horizontal installation
Servo amplifier
P
1
P
C
Regenerative Regenerative Power [W]
Brake Resistor Normal
GRZG400-2 500
GRZG400-1 850
850
Terminal block
Thermal relay
Installation surface
Resistance
Cooling [ ]
800 8
1300 5
1300 4
12 - 6
Fan installation screw hole dimensions
2-M3 screw hole
(for fan installation)
Depth 10 or less
(Screw hole already
82.5 40 (1.58)
(3.25)
Recommended fan:
Toyo Denki's TL396A or equivalent
Number of
Resistors
4
5
5
[Unit : mm(in)]
machined)
"