Internal Dc 24 V Supply, Ss1 - BONFIGLIOLI Agile Applications Manual

10.2.5

Internal DC 24 V Supply, SS1

The application example shows the minimum circuitry for ACTIVE cube frequency inverters for realiza-
tion of the safety function with an emergency stop switch in a common electrical cabinet. Supply of the
safety control device is effected by the internal DC 24 V supply (max. 100 mA for all connected con-
sumers).
When the emergency stop switch is actuated, the travel command "Clockwise" is reset first. After a
delay t , the contacts on the safety switch interrupt the two enable paths STOA and STOB of the ACTIVE
v
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 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 influence on the pulse block in the frequency
inverter.
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