34 AGL-STOV0-01SV0-05
06/12
10.3 Internal DC 24 V Supply, SS1
The application example shows the minimum circuitry for ACTIVE cube frequency
inverters for realization of the safety function with an emergency stop switch in a
common electrical cabinet. Supply of the safety control device is effected by the in-
ternal DC 24 V supply (max. 100 mA for all connected consumers).
When the emergency stop switch is actuated, the travel command “Clockwise” is
reset first. After a delay t
v
, the contacts on the safety switch interrupt the two enable
paths STOA and STOB of the ACTIVE Cube frequency inverter and the integrated
safety function is triggered by interrupting the inverter release.
The delay time is set on the safety control device and must be selected according to
the application. The delay time is set on the safety control device and must be se-
lected according to the application. The set delay time has to be slightly higher than
the shut down time.
A (non-safe) feedback to a process controller can be effected, for example, via a
connected field bus. If STO is requested, the overriding controller has no more influ-
ence on the pulse block in the frequency inverter.
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