Pepperl+Fuchs HiC2027 Series, Руководство пользователя

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20
17-
03
14
Functional Safety HiC2027**, KCD2-STC-(Ex)1.2O.**
Planning
3.4 Characteristic Safety Values
SIL 2 Versions: HiC2027(DE), KCD2-STC-(Ex)1.2O(.DE)
Parameters acc. to IEC 61508 Characteristic values
Assessment type and documentation Full assessment
Device type A
Operating mode Low Demand Mode or High Demand Mode
HFT 0
SIL (SC) 2
Safety function Transfer of analog signals

s
1
1
"No effect failures" and "Annunciation failures" are not influencing the safety function and are therefore not
included in SFF and in the failure rates of the safety function.
0 FIT

dd
222 FIT

du
55 FIT

annunciation
0 FIT

total (safety function)
277 FIT

total (one channel)
920 FIT
SFF
1
80 %
PTC 100 %
MTBF
2
2
acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 24 h. The
value is valid for one channel only.
124 years
PFH 5.49 x 10
-8
1/h
PFD
avg
for T
1
= 1 year 2.40 x 10
-4
PFD
avg
for T
1
= 2 years 4.81 x 10
-4
PFD
avg
for T
1
= 5 years 1.20 x 10
-3
Reaction time < 50 ms
Table 3.8