2.1.5 Safe Stop of FC 300
The FC 302, and also the FC 301 in A1 enclosure, can perform the safety function
Safe Torque Off
(As defined by 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 as suitable for the requirements of:
- Safety Cat. 3 (EN 954-1) / PL “d” (ISO 13849-1)
- Performance Level "d" in ISO EN 13849-1
- SIL 2 Capability in IEC 61508 and EN 61800-5-2
- SILCL 2 in EN 61062
This functionality is called Safe Stop. Prior to integration and use of safe stop in an installation, a thorough risk analysis must be carried out on the
installation in order to determine whether the safe stop functionality and safety levels are appropriate and sufficient.
After installing safe stop, a commissioning test as specified in section
Safe Stop Commissioning Test
of the Design Guide must be
performed. A passed commissioning test is mandatory for fulfilling Safety Cat. 3 (EN 954-1) / PL “d” (ISO 13849-1)
The following values are associated to the different types of safety levels:
Performance Level "d":
- MTTFD (Mean Time To Dangerous Failure): 24816 years
- DC (Diagnostic Coverage): 99.99%
- Category 3
SIL 2 Capability, SILCL 2:
- PFH (Probability of Dangerous failure per Hour) = 7e-10FIT = 7e-19/h
- SFF (Safe Failure Fraction) > 99%
- HFT (Hardware Fault Tolerance) = 0 (1oo1D architecture)
In order to install and use the safe stop function in accordance with the requirements of Safety Cat. 3 (EN 954-1) / PL “d” (ISO 13849-1), the related
information and instructions found in the VLT AutomationDrive Design Guide MG.33.BX.YY must be followed! The information and instructions of the
Instruction Manual are not sufficient for a correct and safe use of the safe stop functionality!
2 Safety Instructions and General Warning
VLT
®
AutomationDrive FC 300 Instruction
Manual
2-4
MG.33.AG.22 - VLT
®
is a registered Danfoss trademark
2
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