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Beckhoff
2.12
Control for motor holding brake
A 24V / max. 2A holding brake in the motor can be controlled directly by the servo amplifier.
Check voltage drop, measure the voltage at brake input and check brake function
(brake and no brake).
This function does not ensure personnel safety!
The brake function must be enabled through the BRAKE parameter (setting: WITH BRAKE). In the
diagram below you can see the time and functional relationships between the ENABLE signal,
speed setpoint, speed and braking force.
During the internal ENABLE delay time of 100ms the speed setpoint of the servo amplifier is
internally driven down a 10ms ramp to 0V. The brake output is switched on when 3% of the final
speed is reached.
The rise (tbrH) and fall (tbrL) times of the holding brake which is built into the motors are different
for the various types of motor (see motor manual). A description of the interface can be found on
page 45.
A safe (for personnel) operation of the holding brake requires an additional "make" (n.o.) contact in
the brake circuit and a suppressor device (varistor) for the brake.
Recommended brake circuit diagram :
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AX2040/2070 Installation Manual
AX2040/2070
02/06
A.4.031.3/01, A.4.038.1/10
Technical Description
21
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