Performance Level
What is the performance level (PL)?
The performance level according to EN ISO 13849 contains five discrete levels which describe the capability of safety relevant components included in a controller to execute a safety function under foreseeable conditions. It can be used to describe safety-relevant machines of all types and technologies (electronic, electrical, hydraulic, mechanical etc.).
The risk analysis of the system and the determination of its PL are based on the risk graph. Quantitative assignment of the safety function into one of the five levels is based on PFHD values.
