OsiSense XS - studiecd.dk

Functional safety> Safety integrity level (SIL), Performance level (PL)MACHINES1SAFETY OF SYSTEMS AND EQUIPMENTEN/IEC 61508Functional safety of electrical / electronic /programmable electronic safety-related systemsEN/ISO 13849-1Safety related parts of control systems23EN/IEC 62061Machine safetyFunctional safety of control electrical / electronic /programmable electronic safety-related systems4Risk reduction according to EN/IEC 61508 and EN/ISO 13849-1• Safety is achieved by risk reduction (for those hazards that cannot be designed-out).• Residual risk is the risk remaining after protective measures have been taken.• Protective measures realised by E/E/PE* safety related systems contribute to risk reduction.* Electric / Electronic / Programmable electronic567RESIDUALRISKTOLERABLERISKEQUIPMENT UNDERCONTROL RISK8Necessary risk reductionActual risk reductionPractical risk coveredby other technologysafety-relatedsystemsPractical risk coveredby electrical / electronic /programmable electronicsafety-related systemsPractical risk coveredby external riskreduction facilities9Risk reduction achieved by all safety-related systemsand external risk reduction facilities109/3