Mitsubishi Electronics MR-J2S- CL User Manual

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3. SIGNALS AND WIRING

3.9 Servo motor with electromagnetic brake

CAUTION

Configure the electromagnetic brake operation circuit so that it is activated not only

by the servo amplifier signals but also by an external forced stop (EMG).

EMG

24VDC

Contacts must be open when
servo-on (SON) is off or when a
trouble (ALM) is present and when an
electromagnetic brake interlock (MBR).

Electromagnetic brake

Servo motor

Circuit must be
opened during
forced stop (EMG).

The electromagnetic brake is provided for holding the motor shaft. Do not use it for

ordinary braking.

POINT

For the power supply capacity, operation delay time and other
specifications of the electromagnetic brake, refer to the Servo Motor
Instruction Manual.

Note the following when the servo motor equipped with electromagnetic brake is used for applications
requiring a brake to hold the motor shaft (vertical lift applications):

1) In the device setting of the Servo Configuration software, make the electromagnetic brake interlock

(MBR) available.

2) Do not share the 24VDC interface power supply between the interface and electromagnetic brake.

Always use the power supply designed exclusively for the electromagnetic brake.

3) The brake will operate when the power (24VDC) switches off.
4) While the reset (RES) is on, the base circuit is shut off. When using the servo motor with a vertical

shaft, use the electromagnetic brake interlock (MBR).

5) Turn off the servo-on (SON) after the servo motor has stopped.

(1) Connection diagram

MBR

COM

Servo amplifier

Servo motor

Forced
stop

24VDC

VDD

(2) Setting

1) In the device setting of the Servo Configuration Software, make the electromagnetic brake interlock

(MBR) available.

2) Using parameter No. 33 (electromagnetic brake sequence output), set a time delay (Tb) at servo-off

from electromagnetic brake operation to base circuit shut-off as in the timing chart shown in (3) in
this section.