Danfoss VLT AutomationDrive FC 300 Design Manual page 55

FC 300 Design Guide
NOTE
The Safe Stop function of FC 302 can be used for asynchronous and synchronous motors. It
may happen that two faults occur in the adjustable frequency drive's power semiconductor. When
using synchronous motors, this may cause a residual rotation. The rotation can be calculated to
Angle=360/(Number of Poles). The application using synchronous motors must take this into consideration
and ensure that this is not a safety-critical issue. This situation is not relevant for asynchronous motors.
NOTE
In order to use the Safe Stop functionality in conformance with the requirements of
EN-954-1 Category 3, a number of conditions must be fulfilled by the installation of Safe
Stop. Please see section Safe Stop Installation for further information.
NOTE
The adjustable frequency drive does not provide a safety-related protection against unintended
or malicious voltage supply to terminal 37 and subsequent reset. Provide this protection via
the interrupt device, at the application level, or at the organizational level.
For more information - see section Safe Stop Installation.
Introduction to FC 300
MG.33.B3.22 - VLT is a registered Danfoss trademark
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