Avoid Unintended Start; Safe Stop - Danfoss VLT Automation Drive FC 300 Operating Instructions Manual

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VLT Automation Drive FC 300
Operating Instructions High Power

2.1.6. Avoid Unintended Start

While the frequency converter is connected to mains, the motor can be started/stop-
ped using digital commands, bus commands, references or via the Local Control Panel
(LCP):
•
•
•

2.1.7. Safe Stop

The FC 302 can perform the safety function
61800-5-2) or
It is designed and approved suitable for the requirements of Safety Category 3 in EN 954-1. This
functionality is called Safe Stop. Prior to integration and use of Safe Stop in an installation, a
thorough risk analysis on the installation must be carried out in order to determine whether the
Safe Stop functionality and safety category are appropriate and sufficient. In order to install and
use the Safe Stop function in accordance with the requirements of Safety Category 3 in EN 954-1,
the related information and instructions of the FC 300 Design Guide MG.33.BX.YY must be fol-
lowed! The information and instructions of the Operating Instructions are not sufficient for a
correct and safe use of the Safe Stop functionality!
Disconnect the frequency converter from mains whenever personal safety considerations
make it necessary to avoid unintended start.
To avoid unintended start, always activate the [OFF] key before changing parameters.
An electronic fault, temporary overload, a fault in the mains supply, or lost motor con-
nection may cause a stopped motor to start. The frequency converter with Safe Stop
provides protection against unintended start, if the Safe Stop Terminal 37 is deactivated
or disconnected.
Stop Category 0
(as defined in EN 60204-1).
MG.33.U1.02 - VLT ® is a registered Danfoss trademark
2. Safety Instructions and General Warning
Safe Torque Off
(As defined by draft CD IEC
2
9