IEC/TR 62061-1 Technical Report
IEC/TR 62061-1 TECHNICAL REPORTGuidance on the application of ISO 13849-1 and IEC 62061 in the design of safety-related control systems for machinery
These standards classify safety-related control systems that implement safety functions into levels that are defined in terms of their probability of dangerous failure per hour. ISO 13849-1 has five Performance Levels (PLs), a, b, c, d and e, while IEC 62061 has three safety integrity levels (SILs), 1, 2 and 3.
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