{"id":54390,"date":"2021-07-26T15:11:42","date_gmt":"2021-07-26T13:11:42","guid":{"rendered":"https:\/\/www.reersafety.cn\/safety-guide\/iso-13849-12safety-of-machinery\/fault-exclusion\/"},"modified":"2022-05-06T14:52:18","modified_gmt":"2022-05-06T12:52:18","slug":"fault-exclusion","status":"publish","type":"page","link":"https:\/\/www.reersafety.cn\/zh-hans\/academy\/safety-guide\/iso-13849-12safety-of-machinery\/fault-exclusion\/","title":{"rendered":"Fault exclusion"},"content":{"rendered":"\n<div class=\"row\"  id=\"row-748834953\">\n\n\n\t<div id=\"col-1362768060\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n  <div id=\"page-header-1032770551\" class=\"page-header-wrapper\">\n  <div class=\"page-title light simple-title\">\n\n    \n    <div class=\"page-title-inner container align-center flex-row medium-flex-wrap row-reverse\" >\n            <div class=\"title-content flex-col flex-left text-left medium-text-center\">\n        <div class=\"title-breadcrumbs pb-half pt-half\"><nav class=\"woocommerce-breadcrumb breadcrumbs uppercase\">\u9996\u9875<\/nav><\/div>      <\/div>\n    <\/div>\n\n       <\/div>\n    <\/div>\n  \n\n\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n<\/div>\n<div class=\"row\"  id=\"row-624888616\">\n\n\n\t<div id=\"col-1586053821\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n<div class=\"row\"  id=\"row-1986317506\">\n\n\n\t<div id=\"col-988358607\" class=\"col small-12 large-12\"  >\n\t\t<div class=\"col-inner text-left\"  >\n\t\t\t\n\t\t\t\n\n\t<div id=\"text-3904469110\" class=\"text cutom-ul\">\n\t\t\n\n<h2>Fault exclusion<\/h2>\n<p>The possibility of a fault exclusion is linked to the compromise between the requirement to consider all dangerous faults and the theoretical possibility that certain type of dangerous fault could not occur.<\/p>\n<p>Fault exclusion is based on:<\/p>\n<ul>\n<li>The very low probability of occurrence of some faults<\/li>\n<li>The accepted technical robusteness of a certain type of component, regardless of the application considered<\/li>\n<li>The technical requirements concerning the application and the type of risk<\/li>\n<\/ul>\n<p>Since a fault exclusion can lead to a very high PL, a detailed justification of the exclusion must be provided in the technical documentation.<\/p>\n<p>For new components or components that are not in the lists of ISO 13849-2, an FMEA analysis (see IEC 60812) must be carried out to establish the faults that\u00a0must be considered for these components and those that can be excluded.<\/p>\n<p>If dangerous faults can be excluded for a component, the contribution of the component to the MTTFD is zero.<\/p>\n<p>For electromechanical components, the analysis on the fault exclusion must be conducted separately for the mechanical part and for the electrical part, considering the environmental conditions and possible external influences.<\/p>\n\t\t\t<\/div>\n\t\n\t<div id=\"gap-487360447\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-487360447 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n\n<div class=\"is-divider divider clearfix\" style=\"max-width:100px;\"><\/div>\n\n<div class=\"row\"  id=\"row-954764561\">\n\n\n\t<div id=\"col-2112219955\" class=\"col medium-4 small-12 large-4\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n\t<div class=\"ux-menu stack stack-col justify-start ux-menu--divider-solid\">\n\t\t\n\n\t<div class=\"ux-menu-link flex menu-item\">\n\t\t<a class=\"ux-menu-link__link flex\" href=\"https:\/\/www.reersafety.cn\/en\/academy\/industrial-safety-guide\/iso-13849-12safety-of-machinery\/computation-of-the-mttfd-2\/\"  >\n\t\t\t<i class=\"ux-menu-link__icon text-center icon-angle-left\" ><\/i>\t\t\t<span class=\"ux-menu-link__text\">\n\t\t\t\tComputation of the MTTFD\t\t\t<\/span>\n\t\t<\/a>\n\t<\/div>\n\t\n\n\n\t<\/div>\n\t\n\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-558729131\" class=\"col medium-4 small-12 large-4\"  >\n\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\n\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-1176996377\" class=\"col medium-4 small-12 large-4\"  >\n\t\t<div class=\"col-inner text-right\"  >\n\t\t\t\n\t\t\t\n\n\t<div class=\"ux-menu stack stack-col justify-start ux-menu--divider-solid\">\n\t\t\n\n\t<div class=\"ux-menu-link flex menu-item\">\n\t\t<a class=\"ux-menu-link__link flex\" href=\"https:\/\/www.reersafety.cn\/en\/academy\/industrial-safety-guide\/iso-13849-12safety-of-machinery\/choice-of-self-diagnosis-techniques-and-dcavg-computation\/\"  >\n\t\t\t<i class=\"ux-menu-link__icon text-center icon-angle-right\" ><\/i>\t\t\t<span class=\"ux-menu-link__text\">\n\t\t\t\tChoice of self-diagnosis techniques and DCavg computation\t\t\t<\/span>\n\t\t<\/a>\n\t<\/div>\n\t\n\n\n\t<\/div>\n\t\n\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n<\/div>\n\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n<\/div>\n\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":7,"featured_media":0,"parent":54342,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Fault exclusion | ReeR<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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