Characteristic Safety Values - Pepperl+Fuchs SIL KFD0-SD2-*. Series Safety Manual

SAFETY MANUAL SIL K*D0-SD*-(EX)*.****(.SP), HIC2871
Planning
2.4

Characteristic Safety Values

Parameters acc. to IEC 61508
Assessment type and documentation
Pepperl+Fuchs FMEDA report
Device type
Demand mode
Safety function
HFT
SIL (hardware)
+ λ
λ
sd su
λ
dd
λ
du
λ
total (safety function)
SFF
2
MTBF
3
PFH
3
PFD for T = 1 year
avg 1
3
T max.
proof
Reaction time
1
Pepperl+Fuchs documentation number
2
acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 24 h.
3
As the λ failure rate is 0 FIT, a PFD calculation yields a PFD of zero, independent from the proof test
d
interval.
Table 2.1
The characteristic safety values like PFD, PFH, SFF, HFT and T
from the SIL report/FMEDA report. Please note, PFD and T
each other.
The function of the devices has to be checked within the proof test interval
(T ).
proof
Variables
Full assessment
1
P+F 05/07-10a R030
A
Low Demand Mode or High Demand Mode
De-energized if the input is in low condition
0
3
114 FIT
0 FIT
0 FIT
227 FIT
100 %
451 years
0 1/h
0
Defined in Proof Test chapter but not necessary to
validate the safety values. See chapter 4.1.
< 100 ms
are taken
proof
are related to
proof
9