Pepperl+Fuchs HiD2025, Руководство пользователя

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Safety Manual SIL HiD202*(SK), HiD2030(SK)
Planning
2
014-
05
9
2.4 Characteristic Safety Values
HiD2025, HiD2026
Parameters acc. to IEC 61508 Values
Assessment type FMEDA report
Device type A
Demand mode Low Demand Mode or High Demand Mode
Safety function
2
Transfer of analog values
HFT 0
SIL 2

s
1
216 FIT

dd
0 FIT

du
92 FIT

no effect
2
112 FIT

not part
7.1 FIT

total (safety function)
308 FIT
SFF 70 %
MTBF
3
362 years
PFH 9.2 x 10
-8
1/h
PFD
avg
for T
proof
= 1 year 4.04 x 10
-4
PFD
avg
for T
proof
= 2 years 8.07 x 10
-4
PFD
avg
for T
proof
= 5 years 2.02 x 10
-3
1
"Not considered" failures are considered 50 % as dangerous undetected failures 
du
and 50 % as safe
detected failures.
2
"No effect" failures are not influencing the safety functions and are therefore added to the

s
.
3
acc. to SN29500. This value includes failures which are not part of the safety function.
Table 2.2