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4. SIGNALS AND WIRING
4.11 Servo motor with an electromagnetic brake
4.11.1 Safety precautions
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 signal.
Contacts must be open when
servo-off, when an trouble (ALM)
and when an electromagnetic brake
interlock (MBR).
Circuit must be
opened during
forced stop (EMG).
Electromagnetic brake
SON RA
EMG
24VDC
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.
Note the following when the servo motor equipped with an 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 (RYn0) after the servo motor has stopped.
Using parameter No.PC16 (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 section 4.11.2 in this
section.