STO AND SS1 SAFETY FUNCTIONS vacon • 23
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Abbreviations or safety parameters definitions
SIL Safety Integrity Level
PL Performance Level
PFH Probability of a dangerous random hardware Failure per Hour
Category Designated architecture for a safety function (from EN ISO 13849-1:2006)
PFD
AVG
The average probability of (random hardware) failure on demand
T
M
Mission time
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