Instruction manual

Specifications Characteristics
10 - 4
10.1.3 Specifications of electromagnetic brake
The characteristics of the electromagnetic brake provided for the servo motor with
electromagnetic brake are indicated in the following table:
There is no manual release mechanism. When it is necessary to hand-turn the servo motor
shaft for machine centering, etc., use a separate 24VDC power supply to release the brake
electrically.

The value for initial ON gap at 20°C.

The brake gap will increase as the brake lining wears.

24VDC of the internal power output for interface (VDD) cannot be used. Always use a
separate power supply.
b
CAUTION:
The electromagnetic brake is designed to hold a load. Do not use it for braking a
rotating motor.
Servo motor HC-MFS Series HC-SFS Series HC-RFS Series HC-KFS Series
Item
053B
13B
23B
43B
73B
052B–
152B/
0524B–
1524B
202B–
702B/
2024B–
7024B
103B–
203B
353B
503B
053B
13B
23B
43B
73B
Type

Electromagnetic disc brake (electrically ventilated and braking by spring power)
Rated voltage

24VDC, +0%/−10%
Rated current at 20°C [A] 0.26 0.33 0.42 0.8 1.4 0.8 0.96 0.26 0.33 0.42
Resistance of the
excitation coil at 20°C [Ω]
91 73 57 29 16,8 30 25 91 73 57
Capacity [W] 6.3 7.9 10 19 34 19 23 6.3 7.9 10
Inrush current [A] 0.18 0.18 0.2 0.2 0.4 0.25 0.24 0.18 0.18 0.2
Cutoff current [A] 0.06 0.11 0.12 0.08 0.2 0.085 0.10 0.06 0.11 0.12
Static friction torque [Nm] 0.32 1.3 2.4 8.3 43.1 6.8 16.7 0.32 43.1 2.4
Release delay time [s]

0.03 0.03 0.03 0.04 0.1 0.03 0.04 0.03 0.1 0.03
Braking
delay time
[s]

AC off
(Fig. 10-4 (a))
0.08 0.1 0.12 0.12 0.12 0.12 0.12 0.08 0.12 0.12
DC off (Fig.
10-4 (b, c))
0.01 0.02 0.03 0.03 0.03 0.03 0.03 0.01 0.03 0.03
Permissib
le braking
moment
[Nm]
per braking 5.6 22.0 64.0 400 4500 400 400 5.6 22.0 64
per hour 56 220 640 4000 45000 4000 4000 56 220 640
Brake looseness at servo
motor shaft [grad]
0.19–
2.5
0.12–
1.2
0.1–
0.9
0.2–
0.6
0.2–
0.6
0.2–
0.6
0.2–
0.6
0.19–
2.5
0.12–
1.2
0.1–
0.9
Brake life Number of
braking cycles
[times]
20000 20000 20000 20000 20000 20000 20000 20000 20000 20000
Work per
braking
[Nm]
4 15 32 200 1000 200 200 4 15 32
Tab. 10-2: characteristics of the electromagnetic brake