- App. 7 -
Appendixes
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
MUMS
Capacity
(W)
30 ~ 100
200, 400
750
Static friction
torque
(N•m)
0.29 or more
1.27 or more
2.45 or more
Inertia
x 10
Å|4
(kg•m
2
)
0.003
0.03
0.09
Absorption
time
(ms)
25 or less
50 or less
60 or less
Releasing
time
(ms) *1
20 or less
(30)
15 or less
(100)
0.26
0.36
0.43
Releasing
voltage
1VDC
or more
39.2
137
196
4.9
44.1
147
Motor
Excitation
current
(DC current (A))
(during cooling)
Allowable
thermal
equivalent of
work per
braking (J)
Allowable
overall
thermal
equivalent of
work(x10
3
J)
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.
