Lamtec F200K2 IR-1, Руководство по безопасности

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9
2 General Safety Instructions
Device type Type B (complex component)
Mode of operation High demand or continuous mode 5
Safety function De-energized flame contact (safety valves)
HFT
2
0
SIL (SC) 3
λ
s
(
λ
su
) 1,31E+03 FIT
λ
dd
6,32E+02 FIT
λ
du
6,43E+01 FIT
λ
no effect
,
λ
don‘t care
2,04E+03 FIT
SFF
3
96,4%
DC
AVG
90,7%
PFH 1,8E-09 1/h
PFD
AVG
7,2E-05
T1 10 years
T2 120 seconds
MTTF 28 years
MTTR
4
8 hours
MTBF 28 years
2
According to DIN EN 61508:2011 HFT > 0 requires complete redundancy, including sensors, actors and power sup-
plies. Nevertheless, a HFT=0 device may reach the safety integrity for the usage in SIL3 safety functions according
to DIN EN 61508 or DIN EN 61511 (see 2.4 Scope of Application).
3
SFF is relevant for elements, subsystems or systems in a complete safety loop. This device is always part of a com-
plete safety loop. A SIL calculation of a safety loop must be evaluated finally with the safe failure fraction of elements,
subsystems and the complete system. Nevertheless, the SFF of the device is given in this document for reference.
4
The MTTR is assumed with 8h for the calculation of PFD/PFH (exchange of the device). In practise, the devices will
be locked in the safe state until it is replaced.
5
An electronic safety device without wear which is certified for the usage in safety functions in high demand mode
can be used in low demand functions as well. Therefore the diagnostic test intervall must be sufficient. For F200K
this is given and the PDF
AVG
can be used for further calculations.