Mitsubishi Electric MELSERVO-JN Series Instruction Manual page 345

12. SERVO MOTOR
12.7.3 Electromagnetic brake
CAUTION
The characteristics of the electromagnetic brake provided for the servo motor with an electromagnetic brake
are indicated below.
Item
Type (Note 1)
Rated voltage (Note 4)
Power consumption
Coil resistance (Note 6)
Inductance (Note 6)
Brake static friction torque
Release delay time (Note 2)
Braking delay time (Note 2)
Permissible braking work
Brake looseness at servo motor shaft (Note 5)
Brake life (Note 3)
Selection example of surge
absorbers to be used (Note 7, 8)
Note 1. It does not have a manual release mechanism. Use a 24 VDC power supply to release the brake electrically.
2. The value for initial on gap at 20 .
3. The brake gap will increase as the brake lining wears, but the gap is not adjustable.
The brake life indicated is the number of braking cycles after which adjustment will be required.
4. Be sure to prepare a power supply exclusively used for the electromagnetic brake.
5. These are design values. These are not guaranteed values.
6. These are measured values. These are not guaranteed values.
7. Select the electromagnetic brake control relay properly, considering the characteristics of the electromagnetic brake
and surge absorber. When a diode is used as surge absorber, the electromagnetic braking time will be longer.
8. Manufactured by Nippon Chemi-Con Corporation.
The electromagnetic brake is provided to prevent a drop at a power failure or servo
alarm occurrence during vertical drive or to hold a shaft at a stop. Do not use it for
normal braking (including braking at servo-lock).
Before operating the servo motor, be sure to confirm that the electromagnetic
brake operates properly.
The operation time of the electromagnetic brake varies depending on the power
supply circuit you use. Be sure to check the operation delay time with an actual
machine.
[s] DC off
Per braking
Per hour
Number of
braking cycles
Work per braking
For the suppressed
voltage 125V
For the suppressed
voltage 350V
Servo motor
053B
G1/G5/G7
Spring actuated type safety brake
[W]at20
[ ] 91.0
[H] 0.15
[N m] 0.32
[s] 0.03
0.01
[J]
[J]
[degree]
[times]
[J]
12 - 42
HG-KR series
13B 23B
G1/G5/G7 G1/G5/G7
0
24VDC
-10%
6.3
5.6
56
2.5
20000
5.6
TND20V-680KB
TND10V-221KB
43B
G1/G5/G7
7.9
73.0
0.18
1.3
0.03
0.02
22
220
1.2
22