Danfoss VLT AQUA Drive Design Manual page 41

VLT ® AQUA Drive Design Guide 2. Introduction to the VLT AQUA Drive
NOTE
The safe stop function of the FC 202 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
2
rotation. The rotation can be calculated to Angle=360/(Number of Poles). The ap-
plication 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 mo-
tors.
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 Installation
safe stop. Please see section for further information.
NOTE
The adjustable frequency drive does not provide 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 organizational
level.
Safe Stop Installation
For more information - see section .
41
MG.20.N2.22 - VLT ® is a registered Danfoss trademark.