Application Examples - BONFIGLIOLI ACTIVE CUBE Series Applications Manual

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The following examples illustrate how the "Safe Torque Off" function works. Accord-
ing to EN 60204, stop functions are divided in different categories. By suitable safety
control devices, stop categories 0 and 1 can be realized in combination with the fre-
quency inverter ACU.
Stop category 0: Stop by immediate disconnection of energy supply to the machine
drive elements, i.e. uncontrolled stop.
Stop category 1: Controlled stop, where energy is still being supplied to the drive
elements of the machine to perform the stopping operation. Energy supply is stopped
only after the drive has come to a standstill.
Stop functions must always have priority over start functions and must work properly
in any operation mode.
Resetting of the stop function must not cause any dangerous state.
The mechanical elements must be dimensioned properly for the stop category used.
If, for example, a mechanical brake is applied in the case of fast-rotating machines
via stop category 0, this brake must be able to stop the machine safely. Wear and
tear of the mechanical elements must be considered during projection for the operat-
ing states and indicated in the maintenance instructions.
Stop category 0 always has priority over stop category 1.
ACU-STOV1-01SV2-03 en
03/11

Application Examples

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