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BRK-OFF Signal
• See Timing Chart describing the timing of issuing BRK-OFF signal, e.g. to
release the brake after power-on, and activate the brake in case a servo-off/
alarm occurs during the operation of the motor.
• The timing (delay) of deactivating BRK-OFF signal (i.e. activating the brake) after the motor
is freed into a non-excited status in case of Servo-OFF or alarm event can be adjusted by
using Pr6B (brake output delay time set-up at motor in motion). For details, see Details of
Parameters.
<Notes>
1. The brake may produce a sound (rattling of brake liner). This is not a problem.
2. When energizing the brake coil (when the brake is off), magnetic flux may leak from the
end of the axis. If a magnetic sensor or similar device is used near the motor, make sure
that the device is not affected by the magnetic flux.
Holding Brake Specifications
Motor
Capacity
(W)
MUMS
30 ~ 100
200, 400
750
Excitation voltage should be 24VDC ±10%
*1) Delay of DC cutoff in case a surge absorber is used.
( ) means actual values using a diode "V03C" made by HITACHI SEMCON DEVICE Co., Ltd.
The values in this table are representative (except the friction torque, releasing voltage and
excitation voltage). The backlash of the brake is factory-set to within ±1 degree.
Static friction
Inertia
Absorption
Å|4
torque
x 10
(N•m)
(kg•m
2
)
(ms)
0.29 or more
0.003
25 or less
1.27 or more
0.03
50 or less
2.45 or more
0.09
60 or less
- App. 7 -
Excitation
Releasing
current
time
time
(DC current (A))
(ms) *1
(during cooling)
20 or less
0.26
(30)
0.36
15 or less
0.43
(100)
Allowable
Allowable
Releasing
thermal
overall
equivalent of
voltage
thermal
work per
equivalent of
braking (J)
3
work(x10
39.2
4.9
1VDC
137
44.1
or more
196
147
J)
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