Beckhoff AX2500 Manual de usuario descargar pdf (Pagina 21)

6.4 Control for motor holding brake

A motor holding brake (24V, max.1.5 A) 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 (on the screen page

for Motor): the setting is WITH.

In the diagram below you can see the timing and functional relationships between the

ENABLE signal, speed setpoint, speed and braking force.

During the internal enable delay time of 100 ms (DECDIS) the speed setpoint of the servo

amplifier is internally driven down a 10 ms ramp to 0. The brake output is switched on

when a speed of 5 rpm is reached, at the latest after 5s (EMRGTO).

The rise (f

brH

) and fall (f

brL

) times of the holding brakes that are built into the motors vary

for the different types of motor (see motor manual). A description of the interface can be

found on page 48.

Personnel-safe operation of the holding brake requires an additional “make” contact in

the brake circuit and a spark suppressor device (e.g. a varistor) in the recommended

brake circuit:

AX2500 Product Manual 21

BECKHOFF 06/2007 Technical description

AX2500

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Beckhoff AX2500 Manual de usuario Pagina 21