t
1
Connection time (close)
t
2
Disconnection time (open)
Fig. 4-7: Switching times of static hold mode
Energy saving function for holding brakes
Decrease brake voltage
The control voltage of the holding brake in MS2N holding brakes can be reduced
after executing the switching operation "Open brake" by using control modules
(e.g. IndraDrive brake control module HAT02.1-003). By decreasing the control
voltage, energy can be saved of up to 50% and the self-heating of the motor can
be reduced.
To decrease the control voltage of MS2N holding brakes, the following condi-
tions apply:
● Maximum decrease of control voltage to U
N
≥17 V DC
● Waiting time after releasing the holding brake is at least 200 ms
● Decreasing the control voltage by voltage control or pulse width modulation
with a PWM cycle frequency ≥ 4 kHz
Refer to the instructions in the control module documentation.
Refer to the notes for dimensioning of the cable length and cable
cross-section of brake cables.
Safety instructions holding brakes
The permanent magnet brake of a MS2N motor is no safety brake. This means, a
torque reduction by non- influenceable disturbance factors can occur. Especially
for use in vertical axes.
MS2N Synchronous Motors
Bosch Rexroth AG
About this product
DOK-MOTOR*-MS2N*******-IT03-EN-P
25/95
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