1.2 Abbreviations
CCF
Common Cause Failure
Failure as a consequence of as common cause
DC
Diagnostic Coverage
Diagnostic Coverage
MTTF
D
Mean Time To Dangerous Failure
Mean Time To Dangerous Failure
OSSD
Output Signal Switch Device
Output Signal Switching Device
PFH
(PFH
D
)
Probability of (dangerous) Failure per Hour
Probability of (dangerous) Failure per Hour
PL
Performance Level
PL according to EN ISO 13849-1
SIL
Safety Integrity Level
Safety Integrity Level SIL 1-4 according to IEC 61508.
The higher the SIL, the less the probability for failure
of a safety function.
SILcl
Safety Integrity Level claim limit
Safety Integrity Level Suitability (according to IEC 62061)
T
M
Mission time
Life expectancy (=max. time of use)
1.3 Warnings
Warning notes are especially safety-relevant and are used for
accident avoidance. This information must be read thoroughly and
followed exactly. The warning notes are constructed as follows:
6
BES M…-D11 Inductive Safety Sensors
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