Reer PI M12 NF Notice D'utilisation Originale page 31

12 Terms and abbreviations
OSSD Output Signal Switch Device
PDDB Proximity devices with defined
behaviour under fault conditions
PFH Probability of (dangerous) Failure
(PFH ) per Hour
D
PL Performance Level
SIL Safety Integrity Level
SILCL Safety Integrity Level
T Mission time
M
PL to EN ISO 13849-1
SIL 1-4 to IEC 61508. The higher the
SIL, the lower the probability that a safety
function will fail.
According to IEC 62061
claim limit
Lifetime to IEC 60947-5-3
(= max. service life)
UK
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