
Performance Level (PL) by ISO 13849
Ranging from PL a (lowest) to PL e (highest), this classification governs safety-related machine control parts under ISO 13849-1. It covers both function and design, applying to electric, hydraulic, pneumatic, and programmable systems. Many OEMs find PL d sufficient for daily operations, but certain high-risk tasks may call for PL e. Most Scanreco transmitters and receivers hold at least PL d classification.