Servo Motor With Electromagnetic Brake; Safety Precautions - Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual

3. SIGNALS AND WIRING

3.11 Servo motor with electromagnetic brake

3.11.1 Safety precautions

CAUTION
Note the following when the servo motor equipped with electromagnetic brake is used :
1) 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.
2) The brake will operate when the power (24VDC) switches off.
3) Switch off the servo-on command after the servo motor has stopped.
(1) Connection diagram
Servo amplifier
DOCOM
DICOM
MBR
(2) Setting
In parameter No.PC02 (electromagnetic brake sequence output), set the time delay (Tb) from
electromagnetic brake operation to base circuit shut-off at a servo off time as in the timing chart in section
3.11.2.
Configure the electromagnetic brake circuit so that it is activated not only by the
interface unit signals but also by a forced stop (EM1).
Contacts must be open when
servo-off, when an alarm occurrence
and when an electromagnetic brake
interlock (MBR).
The electromagnetic brake is provided for holding purpose and must not be used
for ordinary braking.
Before performing the operation, be sure to confirm that the electromagnetic brake
operates properly.
POINT
Refer to the Servo Motor Instruction Manual (Vol.2) for specifications such as
the power supply capacity and operation delay time of the electromagnetic
brake.
Electromagnetic
brake
24VDC
24VDC
RA1
Servo motor
RA EM1
Electromagnetic brake
Trouble Forced
(ALM) stop
B1
B2
3 - 46
Circuit must be
opened during
forced stop (EM1).
24VDC
Servo motor