{"id":32866,"date":"2023-05-08T10:52:28","date_gmt":"2023-05-08T09:52:28","guid":{"rendered":"https:\/\/www.gt-engineering.it\/normative-tecniche\/%tipologia_normativa%\/en-iso-13849-1-performance-level-estimation\/ciao-2-2-2\/"},"modified":"2023-08-11T09:33:57","modified_gmt":"2023-08-11T08:33:57","slug":"category-b-and-category-1","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/","title":{"rendered":"Category B and Category 1"},"content":{"rendered":"\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start flex-col\">\n\n    \n        \n        \n                    <div class=\"relative w-full\">\n                \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>Subsystems of Category B must use <strong>Basic Safety Principles,<\/strong> detailed in ISO 13849-2 [14], and shall be designed according to relevant standards. This should guarantee that they can withstand expected operating stresses and influences of the processed material, like detergents (thanks for example, to the use of stainless steel) or other relevant external influences, like mechanical vibrations.<br \/>\nThe Reliability block diagram of a Category B is shown in Figure 6.3. It is shown as having an Input a Logic and an Output however, each category is applicable to a subsystem: either an Input subsystem or an output subsystem, for example. Therefore, do not be confused by the figure: it shows a subsystem and not necessarily a Safety-related control system.<\/p>\n<\/div>            <\/div>\n        \n        \n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\n\n    \n        \n    \n\n\n\n\n    \n        \n    \n","protected":false},"excerpt":{"rendered":"<p>&nbsp;<\/p>\n<p>The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system.<\/p>\n<p>It represents the av&#8230;<\/p>\n","protected":false},"author":1,"featured_media":42039,"parent":3245,"menu_order":3,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[57],"class_list":["post-32866","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-en-iso-standards"],"acf":{"sottotitolo":"Il Mean Time To Failure (MTTF)","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Annex C: MTTF calculation<\/title>\n<meta name=\"description\" content=\"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Annex C: MTTF calculation\" \/>\n<meta property=\"og:description\" content=\"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/\" \/>\n<meta property=\"og:site_name\" content=\"Gt-Engineering\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-11T08:33:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"150\" \/>\n\t<meta property=\"og:image:height\" content=\"150\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Annex C: MTTF calculation\" \/>\n<meta name=\"twitter:description\" content=\"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/\",\"url\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/\",\"name\":\"Annex C: MTTF calculation\",\"isPartOf\":{\"@id\":\"https:\/\/www.gt-engineering.it\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp\",\"datePublished\":\"2023-05-08T09:52:28+00:00\",\"dateModified\":\"2023-08-11T08:33:57+00:00\",\"description\":\"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#primaryimage\",\"url\":\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp\",\"contentUrl\":\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp\",\"width\":150,\"height\":150},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.gt-engineering.it\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Technical standards\",\"item\":\"https:\/\/www.gt-engineering.it\/en\/normative-tecniche\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Harmonised European Standards\",\"item\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/\"},{\"@type\":\"ListItem\",\"position\":4,\"name\":\"EN ISO 13849-1: Functional Safety of Machinery\",\"item\":\"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/\"},{\"@type\":\"ListItem\",\"position\":5,\"name\":\"Category B and Category 1\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.gt-engineering.it\/en\/#website\",\"url\":\"https:\/\/www.gt-engineering.it\/en\/\",\"name\":\"Gt-Engineering\",\"description\":\"bizonweb\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.gt-engineering.it\/en\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Annex C: MTTF calculation","description":"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/","og_locale":"en_US","og_type":"article","og_title":"Annex C: MTTF calculation","og_description":"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...","og_url":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/","og_site_name":"Gt-Engineering","article_modified_time":"2023-08-11T08:33:57+00:00","og_image":[{"width":150,"height":150,"url":"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp","type":"image\/webp"}],"twitter_card":"summary_large_image","twitter_title":"Annex C: MTTF calculation","twitter_description":"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/","url":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/","name":"Annex C: MTTF calculation","isPartOf":{"@id":"https:\/\/www.gt-engineering.it\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#primaryimage"},"image":{"@id":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#primaryimage"},"thumbnailUrl":"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp","datePublished":"2023-05-08T09:52:28+00:00","dateModified":"2023-08-11T08:33:57+00:00","description":"\u00a0 The Mean Time To Failure (MTTF) is a statistical parameter related to the reliability of the components used in the safety system. It represents the av...","breadcrumb":{"@id":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#primaryimage","url":"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp","contentUrl":"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/05\/Screenshot-2023-05-08-115445-1.png-150x150-1.webp","width":150,"height":150},{"@type":"BreadcrumbList","@id":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/category-b-and-category-1\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.gt-engineering.it\/en\/"},{"@type":"ListItem","position":2,"name":"Technical standards","item":"https:\/\/www.gt-engineering.it\/en\/normative-tecniche\/"},{"@type":"ListItem","position":3,"name":"Harmonised European Standards","item":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/"},{"@type":"ListItem","position":4,"name":"EN ISO 13849-1: Functional Safety of Machinery","item":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-13849-1-performance-level-estimation\/"},{"@type":"ListItem","position":5,"name":"Category B and Category 1"}]},{"@type":"WebSite","@id":"https:\/\/www.gt-engineering.it\/en\/#website","url":"https:\/\/www.gt-engineering.it\/en\/","name":"Gt-Engineering","description":"bizonweb","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.gt-engineering.it\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/normativa_tecnica\/32866","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/normativa_tecnica"}],"about":[{"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/types\/normativa_tecnica"}],"author":[{"embeddable":true,"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":8,"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/normativa_tecnica\/32866\/revisions"}],"predecessor-version":[{"id":32883,"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/normativa_tecnica\/32866\/revisions\/32883"}],"up":[{"embeddable":true,"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/normativa_tecnica\/3245"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/media\/42039"}],"wp:attachment":[{"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/media?parent=32866"}],"wp:term":[{"taxonomy":"tipologia_normativa","embeddable":true,"href":"https:\/\/www.gt-engineering.it\/en\/wp-json\/wp\/v2\/normative-tecniche?post=32866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}