IEC TS 60204-34:2016 Safety of machinery - Electrical equipment of machines - Part 34: Requirements for machine tools
9.4.4 Levels of functional safety Functional safety is part of the overall safety that depends on a system or equipment operating correctly in response to its inputs. For the purposes of ISO 13849, the ability of safety-related parts to perform a safety function is expressed through the determination of the performance level (PL). According to IEC 62061 and lEG 61508, the ability of safety-related control systems to perform a safety function is given through a SIL. Table 2 displays the relationship between the two concepts (PL5 and SIL5). See Annex A of ISO 13849-1:2006 for determination of required performance level (PLs); a SIL example of a methodology is given in Annex A of lEG 62061 :2005, IEC 62061 :2005/AMD1 :2012 and lEG 62061 :2005/AMD2:201 5. Detailed information to implement functional safety is given in ISO 13849-1, lEG 62061, IEC 61508, lEG 61131-6.
Annex AA gives guidance for the proper usage of EN 50370-1 and EN 50370-2, which provide information specifically for machine tools
NOTE 1 The generic EMC standards IEC 61000-6-1 or IEC 61000-6-2 and IEC 61000-6-3 or EC 61000-6-4 provide general EMC emission and immunity limits(see also EC 60204-1: -,4.4.2)
NOTE 2 Relevant product standards can specify additional EMC requirements(e.g. EC 61800-3 for power drive systems
Annex AA is not applicable to EDM
If the machine tool contains no electromagnetically relevant components, no tests are required Annex AA is provided for general guidance. It should be noted that the actual requirements ir the latest edition of the referenced standard can be different and should be complied with
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