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User Manual 08/2003 Edition

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02.99 04.01 05.03<br />

5.5.13 Holding brake (from SW 1.4)<br />

Description<br />

!<br />

Current I<br />

I B<br />

Fig. 5-14 Definition of times for holding operation<br />

Siemens AG <strong>2003</strong> All rights reserved<br />

SIMODRIVE POSMO A <strong>User</strong> <strong>Manual</strong> (POS1) – <strong>08</strong>.03 <strong>Edition</strong><br />

5.5 SIMODRIVE POSMO A functions<br />

Using the brake sequence control, the axes can be held at standstill to<br />

avoid undesirable motion.<br />

The sequence control can be used both for motors with integrated holding<br />

brake as well as to control an external holding brake.<br />

Holding brake for 75 W motors<br />

75 W motors do not have an integrated holding brake.<br />

An external holding brake can always be used. In this case, it is<br />

controlled using an appropriately parameterized digital output.<br />

Holding brake for 300 W motors<br />

300 W motors are optionally available with integrated holding brake.<br />

An external holding brake can always be used. In this case, the<br />

brake is controlled using an appropriately parameterized digital output.<br />

Warning<br />

It is not permissible to use the integrated holding brake as working<br />

brake, as generally it is only designed for a limited number of<br />

emergency braking operations.<br />

Axial forces may not be applied to the shaft – both when installing<br />

and operating the system!<br />

t 0<br />

Brake opened<br />

t 0 = Opening time t c1 = Closing time<br />

Reader’s note<br />

Technical data, refer to Chapter 2.6.2, Table 2-7.<br />

t c1<br />

5 Description of the Functions<br />

Voltage V<br />

t<br />

U B<br />

5-171<br />

5

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