Avoid Unintended Start; Safe Stop Of Fc 300 - Danfoss FC 300 Operating Instruction

FC 300 Operating Instructions
Before Commencing Repair Work
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Disconnect FC 300 from mains
1.
Disconnect DC bus terminals 88 and 89
2.
Wait for discharge of the DC-link. See period of time on the warning label.
3.
Remove motor cable
4.

Avoid Unintended Start

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While FC 300 is connected to mains, the motor can be started/stopped using digital commands,
bus commands, references or via the Local Control Panel (LCP).
• Disconnect the FC 300 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 connection
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may cause a stopped motor to start. FC 300 with Safe Stop (i.e. FC301 in A1 enclosure
and FC302) provides a certain degree of protection against such unintended start, if the
Safe Stop Terminal 37 is on low voltage level or disconnected.

Safe Stop of FC 300

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The FC 302, and also the FC301 in A1 enclosure,
can perform the safety function Safe Torque Off
(As defined by draft CD IEC 61800-5-2) or Stop
Category 0 (as defined in EN 60204-1).
FC 301 A1 enclosure: When Safe Stop is included
in the drive position 18 of Type Code must
be either T or U. If position 18 is B or X Safe
Stop Terminal 37 is not included!
Example:
Type Code for FC 301 A1 with Safe Stop:
FC-301PK75T4Z20H4TGCXXXSXXXXA0BXCXXXXD0
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 followed!
The information and instructions of the Operating
Instructions are not sufficient for a correct and
safe use of the Safe Stop functionality!
Safety Instructions and General Warning
MG.33.A7.02 - VLT is a registered Danfoss trademark
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