Pepperl+Fuchs SIL KFD0-RSH-1, Руководство по безопасности

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Safety Manual SIL KFD0-RSH-1(-Y2), KFD2-SL-4
Planning
2
014-07
9
2.4 Characteristic Safety Values
KFD0-RSH-1
Parameters acc. to IEC 61508 Values
Assessment type and documentation FMEDA report
Device type A
Mode of operation Low Demand Mode or High Demand Mode
HFT 0
SIL 3
Safety function Output relay in OFF state when input is de-
energized

s
251.6 FIT

dd
0 FIT

du
0.4 FIT

no effect
69.6 FIT

total (safety function)
252 FIT
SFF 99.8 %
MTBF
1
452 years
PFH 4.00 x 10
-10
1/h
PFD
avg
for T
proof
= 1 year 1.75 x 10
-6
PFD
avg
for T
proof
= 2 years 3.50 x 10
-6
PFD
avg
for T
proof
= 5 years 8.76 x 10
-6
Reaction time
2
< 20 ms
1
acc. to SN29500. This value includes failures which are not part of the safety function.
2
Time between fault detection and fault reaction.
Table 2.1