(Compact line S)

Description and operation
Electromagnetic brake with negative operation, whose braking action is exercised in the absence of power supply.
If the electromagnet (1) is powered, the mobile armature (2) is drawn by the magnetic force and allows the shaft to rotate freely.
When the power supply is interrupted, the excitation coil is no longer powered and therefore does not exert the magnetic force necessary to restrain the mobile armature (2).
The latter, pushed by the pressure spring (3), compresses the lining attached to the mobile armature against the cast-iron fan (4), in turn attached to the motor shaft by the tabs (5), thereby creating a braking action.
The standard voltage for this type of brake is 230V/50Hz/60Hz with possible variations of ±10% in the rated voltage.

Air gap adjustment
For proper operation, the air gap S [mm] between the electromagnet (1) and the mobile armature (2) must be between the limits indicated in the table (Snom-Smax).
Once the brake assembly is firmly attached to the motor, adjust using the screw (6), setting and checking with a thickness gauge to make sure that the desired air gap is reached.
This should be done with the brake at ambient temperature.

Braking intervention times
For the direct current brake, powered by an alternatingcurrent diode jumper, it is possible to achieve rapid braking intervention using special power packs.

 

DC-S Brake
63
71
80
90
100
112
132
160

Snom [mm]

0,20

0,20

0,20

0,20

0,30

0,30

0,30

0,50

Smax [mm]

0,4

0,4

0,4

0,5

0,5

0,7

0,7

0,8

Cn [Nm] *

3,0

4,0

9,0

10,0

12,0

13,0

17,0

30,0

Braking time [ms]

40,0

100,0

120,0

120,0

200,0

200,0

200,0

215,0

Rapid braking time [ms]

30,0

30,0

45,0

45,0

55,0

55,0

55,0

65,0

Release time [ms]

15,0

15,0

15,0

15,0

10,0

10,0

10,0

13,0

Absorbed power [VA]

18,0

18,0

25,0

25,0

35,0

35,0

35,0

65,0

Noise level [dB] **

68,0

68,0

69,0

69,0

66,0

66,0

66,0

67,0

Max speed [rpm]

3600

3600

3600

3600

3600

3600

3600

3600

* Braking torque
** Indicative braking values

 

1. Electromagnet

2. Mobile armature

3. Torque spring

4. Cast-iron fan

5. Key

6. Screw

7. Pre-loading screw

8. Threaded bushes

9. Washer

10. Clutch lining

S. Air gap