Glossary; Terms From En Iso 13849; Terms From En 61508 - HYDAC ELECTRONIC HDA 4000 Bedienungsanleitung Und Sicherheitshinweise

HDA 4000 ATEX, IECEx intrinsically safe, increased safety, for hydrogen applications - SIL 2 / PLd
29

Glossary

29.1

Terms from EN ISO 13849

Abbreviation
MTTF
D
DC
av g
CCF
PL
29.2

Terms from EN 61508

Abbreviation
SIL
HFT
SFF
MooN
PFH
PFD
FMEDA
λ
sd
λ
su
λ
dd
λ
du
DC
s
DC
d
FIT
MTBF
MTTF
MTTR
Edition: 2022-01-06
Meaning
Mean Time To Dangerous Failure
Average Diagnostic Coverage
Common Cause Failure
Performance Level
Meaning
Safety Integrity Level
Hardware Failure Tolerance
Safe Failure Fraction
M out of N architecture
Probability of a Dangerous Failure per Hour
Probability of a Dangerous Failure on Demand
Failure Mode, Effects and Diagosis Analysis
Rate for safe detected failures
Rate for safe undetected failures
Rate for dangerous detected failures
Rate for dangerous undetected failures
Diagnostic coverage of safe failures
Diagnostic coverage of dangerous failures
Failure in time (1 FIT = 1 failure / 10
Mean Time Between Failure
Mean Time To Failure
Mean Time To Repair
HYDAC ELECTRONIC GMBH
9
hours)
43
Part no.: 670051