ISO 13849 Safety of machinery, describes the requirements for the functional safety of machines. The safety standards in the field of machinery are divided into Type A, Type B and Type C standards. ISO 13849 is a Type B standard. For machines that are covered by the scope of a Type C standard and that are designed and constructed in accordance with the requirements of this standard, the requirements of this Type C standard take precedence.

Like other Functional Safety Standards, ISO 13849 specifies various levels of criticality. The standard defines the performance levels (PL) a – e for this purpose. PL b and PL c correspond to SIL 1 according to IEC 61508 (high/continuous mode), PL d corresponds to SIL 2 and PL e corresponds to SIL 3. Read more