3. SIGNALS AND WIRING

3.9 Servo motor with electromagnetic brake

Configure the electromagnetic brake operation circuit so that it is activated not only by the servo amplifier signals but also by an external emergency stop signal.

CAUTION

Contacts must be open when

 

servo-on signal is off or when an

Circuit must be

alarm (trouble) is present and when

opened during

an electromagnetic brake signal.

emergency stop signal.

Servo motor

RA EMG

24VDC

Electromagnetic brake

The electromagnetic brake is provided for holding purpose and must not be used for ordinary braking.

POINT

Refer to the Servo Motor Instruction Manual 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 electromagnetic brake is used for applications requiring a brake to hold the motor shaft (vertical lift applications):

1)Set " 1 "in parameter No.1 to make the electromagnetic brake interlock signal (MBR) valid. Note that this will make the zero speed signal (ZSP) unavailable.

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 signal is on, the base circuit is shut off. When using the servo motor with a vertical shaft, use the electromagnetic brake interlock signal (MBR).

5)Switch off the servo-on signal after the servo motor has stopped.

(1)Connection diagram

Servo amplifier

 

 

 

 

 

 

 

Emergency

 

Servo motor

 

 

 

 

 

RA

 

 

 

VDD

 

 

 

 

 

stop

B1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MBR

RA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24VDC

 

 

 

 

 

B2

(2)Setting

1)Set " 1 "in parameter No.1 to make the electromagnetic brake interlock signal (MBR) valid.

2)Using parameter No.33 (electromagnetic brake sequence output), set a time delay from electromagnetic brake operation to base circuit shut-off as in the timing chart shown in (3) in this section.

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Mitsubishi Electronics MR-J2S- A instruction manual Setting, COM MBR 24VDC