{"id":36454,"date":"2023-01-04T17:58:58","date_gmt":"2023-01-04T16:58:58","guid":{"rendered":"https:\/\/www.gt-engineering.it\/?post_type=normativa_tecnica&#038;p=36454"},"modified":"2023-06-26T16:02:33","modified_gmt":"2023-06-26T15:02:33","slug":"les-quatre-architectures","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/fr\/reglements-techniques\/normes-iec\/iec-62061-securite-fonctionnelle-des-machines\/les-quatre-architectures\/","title":{"rendered":"Les quatre architectures"},"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 md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Architectures-150x150.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"152\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Architectures-300x152.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"388\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Architectures-768x388.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 1024px)\"\r\n                                width=\"1024\"\r\n                                height=\"518\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Architectures-1024x518.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Architectures.jpg.webp\"\r\n                                                        title=\"Architectures\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\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>Un syst\u00e8me de contr\u00f4le de s\u00e9curit\u00e9 (SCS), analys\u00e9 avec la m\u00e9thode simplifi\u00e9e recommand\u00e9e par la IEC 62061, doit \u00eatre compos\u00e9 de sous-syst\u00e8mes, dont chacun doit \u00eatre associ\u00e9 \u00e0 l&rsquo;une <strong>des quatre architectures de sous-syst\u00e8mes de base<\/strong>, d\u00e9crites ci-apr\u00e8s.<\/p>\n<p>La norme a donc d\u00e9velopp\u00e9 une approche simplifi\u00e9e de l&rsquo;estimation de la probabilit\u00e9 de d\u00e9faillances mat\u00e9rielles al\u00e9atoires dangereuses (PFHD) pour un certain nombre d&rsquo;architectures de sous-syst\u00e8mes de base et donne des formules qui peuvent \u00eatre utilis\u00e9es pour les sous-syst\u00e8mes assembl\u00e9s \u00e0 partir d&rsquo;\u00e9l\u00e9ments de sous-syst\u00e8mes de faible complexit\u00e9 ou d&rsquo;\u00e9l\u00e9ments de sous-syst\u00e8mes complexes. Les formules sont en elles-m\u00eames une simplification de la th\u00e9orie de l&rsquo;analyse de la fiabilit\u00e9 et sont destin\u00e9es \u00e0 fournir des estimations qui sont biais\u00e9es dans le sens de la s\u00e9curit\u00e9.<\/p>\n<p>La condition pr\u00e9alable \u00e0 la validit\u00e9 de toutes les formules donn\u00e9es dans ce paragraphe est que \u03bb &#8211; T1 &lt;&lt; 1, o\u00f9 T1 est le plus petit intervalle entre l&rsquo;intervalle <strong>d&rsquo;\u00e9preuve<\/strong> et <strong>la dur\u00e9e de vie utile.<\/strong><\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:block\">\n\n    \n                    <div class=\"mb-6 relative w-full md:mb-4 lg:mb-8 xl:mb-9\">\n                \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h2 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Architecture A: 1oo1    <\/h2>\n        <\/div>\n                <\/div>\n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"101\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-A.png-150x101.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"59\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-A.png-300x59.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 512px)\"\r\n                                width=\"512\"\r\n                                height=\"101\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-A.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 512px)\"\r\n                                width=\"512\"\r\n                                height=\"101\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-A.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-A.png.webp\"\r\n                                                        title=\"ARTICOLO-62061-A.png\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\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>Dans cette architecture, \u00e0 canal unique sans diagnostic, toute d\u00e9faillance dangereuse d&rsquo;un \u00e9l\u00e9ment du sous-syst\u00e8me entra\u00eene une d\u00e9faillance de la fonction de s\u00e9curit\u00e9. Cette architecture correspond \u00e0 une tol\u00e9rance de d\u00e9faillance mat\u00e9rielle de 0.<\/p>\n<p>Pour l&rsquo;architecture A, la probabilit\u00e9 de d\u00e9faillance dangereuse du sous-syst\u00e8me est la<strong> somme des probabilit\u00e9s de d\u00e9faillance dangereuse de tous les \u00e9l\u00e9ments<\/strong> du sous-syst\u00e8me :<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"79\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-150x79.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"56\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-300x56.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 427px)\"\r\n                                width=\"427\"\r\n                                height=\"79\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 427px)\"\r\n                                width=\"427\"\r\n                                height=\"79\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download.png.webp\"\r\n                                                        title=\"download\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\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>Avec HFT = 0, on peut atteindre <strong>SIL 3.<\/strong> Cela peut \u00eatre valable pour les <strong>composants \u00e9lectroniques<\/strong>. Toutefois, pour <strong>les composants \u00e9lectrom\u00e9caniques<\/strong>, avec DC = SFF = 0 %, un maximum de <strong>SIL 1<\/strong> peut \u00eatre atteint.<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:block\">\n\n    \n                    <div class=\"mb-6 relative w-full md:mb-4 lg:mb-8 xl:mb-9\">\n                \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h2 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Architecture B: 1oo2    <\/h2>\n        <\/div>\n                <\/div>\n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"144\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-B.png-150x144.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"96\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-B.png-300x96.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 452px)\"\r\n                                width=\"452\"\r\n                                height=\"144\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-B.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 452px)\"\r\n                                width=\"452\"\r\n                                height=\"144\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-B.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/ARTICOLO-62061-B.png.webp\"\r\n                                                        title=\"ARTICOLO-62061-B.png\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\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>Cette architecture, \u00e0 double canal sans diagnostic, est telle qu&rsquo;une d\u00e9faillance unique d&rsquo;un \u00e9l\u00e9ment du sous-syst\u00e8me n&rsquo;entra\u00eene pas la perte de la fonction de s\u00e9curit\u00e9. Cette architecture correspond \u00e0 une tol\u00e9rance de d\u00e9faillance mat\u00e9rielle de 1. Cette architecture n&rsquo;a <strong>pas d&rsquo;\u00e9quivalent dans la norme ISO 13849-1.<\/strong><\/p>\n<p>La PFHD est la suivante :<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:flex-row\">\n\n    \n\n                    <div \n                class=\"order-2 relative w-full md:w-3\/4\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9  md:pl-12 xl:pl-24\"\n                >\n                    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>O\u00f9 : T1 est l&rsquo;intervalle d&rsquo;essai d&rsquo;\u00e9preuve du sous-syst\u00e8me :<\/p>\n<p>&#8211; <strong>T1<\/strong> est l&rsquo;intervalle d&rsquo;\u00e9preuve de l&rsquo;\u00e9preuve parfaite ou la dur\u00e9e de vie utile, la valeur la plus faible \u00e9tant retenue ;<\/p>\n<p>&#8211; <strong>\u03b2<\/strong> est la susceptibilit\u00e9 aux d\u00e9faillances de cause commune.<\/p>\n<p>Avec HFT = 1, on peut atteindre<strong> SIL 3<\/strong>. Cela peut \u00eatre valable pour les <strong>composants \u00e9lectroniques<\/strong>. Toutefois, pour les <strong>composants \u00e9lectrom\u00e9caniques<\/strong>, \u00e9tant DC = SFF = 0 %, un maximum de <strong>SIL 1<\/strong> peut \u00eatre atteint, m\u00eame si la formule donne un PFHD inf\u00e9rieur, \u00e0 condition que des composants bien test\u00e9s soient utilis\u00e9s.<\/p>\n<\/div>                <\/div>\n            <\/div>\n        \n                    <div\n                class=\"h-auto order-1 mb-8 md:mb-0   overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"60\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-1-150x60.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"34\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-1-300x34.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 529px)\"\r\n                                width=\"529\"\r\n                                height=\"60\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-1.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 529px)\"\r\n                                width=\"529\"\r\n                                height=\"60\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-1.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full mx-auto\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-1.png.webp\"\r\n                                                        title=\"download (1)\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:block\">\n\n    \n                    <div class=\"mb-6 relative w-full md:mb-4 lg:mb-8 xl:mb-9\">\n                \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h2 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Architecture C: 1oo1D    <\/h2>\n        <\/div>\n                <\/div>\n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/IEC-62061-1oo1D.jpg-150x150.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"179\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/IEC-62061-1oo1D.jpg-300x179.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"459\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/IEC-62061-1oo1D.jpg-768x459.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 834px)\"\r\n                                width=\"834\"\r\n                                height=\"498\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/IEC-62061-1oo1D.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/IEC-62061-1oo1D.jpg.webp\"\r\n                                                        title=\"IEC-62061-1oo1D.jpg\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\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>Dans cette architecture, \u00e0 canal unique avec diagnostic, toute d\u00e9faillance dangereuse non d\u00e9tect\u00e9e de l&rsquo;\u00e9l\u00e9ment du sous-syst\u00e8me entra\u00eene une d\u00e9faillance dangereuse de la fonction de commande relative \u00e0 la s\u00e9curit\u00e9. Lorsqu&rsquo;une d\u00e9faillance d&rsquo;un \u00e9l\u00e9ment du sous-syst\u00e8me est d\u00e9tect\u00e9e, la (les) fonction(s) de diagnostic d\u00e9clenche(nt) une r\u00e9action de d\u00e9faillance. Cette architecture<strong> correspond \u00e0 la cat\u00e9gorie 2 de la norme ISO 13849-1.<\/strong><\/p>\n<p>Il s&rsquo;agit d&rsquo;une architecture \u00ab\u00a0d\u00e9licate\u00a0\u00bb, similaire \u00e0 la cat\u00e9gorie 2. Le probl\u00e8me est la d\u00e9faillance de la fonction de diagnostic, appel\u00e9e fonction de traitement des d\u00e9faillances, alors que le canal fonctionnel fonctionne toujours. La fonction de traitement des d\u00e9faillances comprend \u00e0 la fois la fonction de d\u00e9tection des d\u00e9faillances (appel\u00e9e \u00e9quipement d&rsquo;essai, TE dans la norme ISO 13849-1) et la fonction de r\u00e9action aux d\u00e9faillances (appel\u00e9e sortie de l&rsquo;\u00e9quipement d&rsquo;essai, OTE dans la norme ISO 13849-1).<\/p>\n<p>Dans ce cas, la PFHD est :<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:flex-row\">\n\n    \n\n                    <div \n                class=\"order-2 relative w-full md:w-3\/4\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9  md:pl-12 xl:pl-24\"\n                >\n                    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>Pour l&rsquo;architecture C, le calcul de la PFHd suppose un traitement des <strong>d\u00e9faillances optimal dans le temps.<\/strong><br \/>\nLa gestion optimale des d\u00e9fauts dans le temps d&rsquo;un \u00e9l\u00e9ment de sous-syst\u00e8me peut \u00eatre suppos\u00e9e si l&rsquo;une des conditions suivantes est remplie :<\/p>\n<ul>\n<li><strong>Le taux de diagnostic est sup\u00e9rieur d&rsquo;au moins un facteur 100 au taux de demande de la fonction de s\u00e9curit\u00e9 et<\/strong> le temps n\u00e9cessaire \u00e0 la r\u00e9action au d\u00e9faut est suffisamment court pour amener le syst\u00e8me \u00e0 un \u00e9tat s\u00fbr avant qu&rsquo;un \u00e9v\u00e9nement dangereux ne se produise ; ou<\/li>\n<li>La gestion des d\u00e9faillances est effectu\u00e9e imm\u00e9diatement apr\u00e8s toute demande potentielle de la fonction de s\u00e9curit\u00e9 et le temps n\u00e9cessaire pour d\u00e9tecter une d\u00e9faillance d\u00e9tectable et <strong>pour amener le syst\u00e8me \u00e0 un \u00e9tat s\u00fbr<\/strong> est plus court que le temps de s\u00e9curit\u00e9 du processus ; ou<\/li>\n<li><strong>La gestion des d\u00e9fauts est effectu\u00e9e en continu<\/strong>, et le temps n\u00e9cessaire pour d\u00e9tecter un d\u00e9faut d\u00e9tectable et pour ramener le syst\u00e8me \u00e0 un \u00e9tat s\u00fbr est inf\u00e9rieur au temps de s\u00e9curit\u00e9 du processus ; ou<\/li>\n<li>Le traitement des d\u00e9fauts est effectu\u00e9 p\u00e9riodiquement et la somme de l&rsquo;intervalle d&rsquo;essai, du temps n\u00e9cessaire pour d\u00e9tecter un d\u00e9faut d\u00e9tectable <strong>et du temps n\u00e9cessaire pour amener le syst\u00e8me \u00e0 un \u00e9tat s\u00fbr<\/strong> est inf\u00e9rieure au temps de s\u00e9curit\u00e9 du processus.<\/li>\n<\/ul>\n<\/div>                <\/div>\n            <\/div>\n        \n                    <div\n                class=\"h-auto order-1 mb-8 md:mb-0   overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"33\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-2-150x33.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"21\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-2-300x21.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 480px)\"\r\n                                width=\"480\"\r\n                                height=\"33\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-2.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 480px)\"\r\n                                width=\"480\"\r\n                                height=\"33\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-2.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full mx-auto\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-2.png.webp\"\r\n                                                        title=\"download (2)\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:flex-row\">\n\n    \n\n                    <div \n                class=\"order-1 relative w-full md:w-3\/4\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9 md:pr-12 xl:pr-24\"\n                >\n                    \n        <div                class=\"m-headings\"\n            >\n    \n    \n<h2 class=\"a-heading text-left text-primary font-heading text-2xl lg:text-3xl xl:text-4xl font-normal mt-2 first:mt-0\">\n                    Architecture D: 1oo2D    <\/h2>\n        <\/div>\n    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>Cette architecture, \u00e0 double canal avec diagnostic, est telle qu&rsquo;une d\u00e9faillance unique d&rsquo;un \u00e9l\u00e9ment du sous-syst\u00e8me n&rsquo;entra\u00eene pas la perte de la fonction de contr\u00f4le li\u00e9e \u00e0 la s\u00e9curit\u00e9. Lorsqu&rsquo;une d\u00e9faillance d&rsquo;un \u00e9l\u00e9ment du sous-syst\u00e8me est d\u00e9tect\u00e9e, la ou les fonctions de diagnostic d\u00e9clenchent une fonction de r\u00e9action \u00e0 la d\u00e9faillance. Cette architecture correspond \u00e0 une tol\u00e9rance de d\u00e9faillance mat\u00e9rielle de 1.<\/p>\n<p>Cette architecture correspond <strong>\u00e0 la cat\u00e9gorie 3 ou 4 de la norme ISO 13849-1<\/strong>. La PFHD du sous-syst\u00e8me est :<\/p>\n<\/div>                <\/div>\n            <\/div>\n        \n                    <div\n                class=\"h-auto order-2 mb-8 md:mb-0   overflow-hidden shadow-content-image w-full md:w-1\/2\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"52\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-3-150x52.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"18\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-3-300x18.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"46\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-3-768x46.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 867px)\"\r\n                                width=\"867\"\r\n                                height=\"52\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-3.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full mx-auto\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-3.png.webp\"\r\n                                                        title=\"download (3)\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:flex-row\">\n\n    \n\n                    <div \n                class=\"order-1 relative w-full md:w-3\/4\"\n            >\n                <div\n                    class=\"pt-6 space-y-6 w-full md:pt-0 md:space-y-4 lg:space-y-8 xl:space-y-9 md:pr-12 xl:pr-24\"\n                >\n                    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p>o\u00f9 :<\/p>\n<p>&#8211; T1 est l&rsquo;intervalle d&rsquo;\u00e9preuve de l&rsquo;\u00e9preuve parfaite ou la dur\u00e9e de vie utile, la valeur la plus faible \u00e9tant retenue ;<\/p>\n<p>&#8211; T2 est l&rsquo;intervalle de test de diagnostic ;<\/p>\n<p>&#8211; \u03b2 est la susceptibilit\u00e9 aux d\u00e9faillances de cause commune ;<\/p>\n<p>&#8211; \u03bbDe1 est le taux de d\u00e9faillance dangereuse de l&rsquo;\u00e9l\u00e9ment de sous-syst\u00e8me e1 ;<\/p>\n<p>&#8211; \u03bbDe2 est le taux de d\u00e9faillance dangereuse de l&rsquo;\u00e9l\u00e9ment e2 du sous-syst\u00e8me ;<\/p>\n<p>&#8211; DC1 est la couverture diagnostique de l&rsquo;\u00e9l\u00e9ment de sous-syst\u00e8me e1 ;<\/p>\n<p>&#8211; DC2 est la couverture diagnostique de l&rsquo;\u00e9l\u00e9ment de sous-syst\u00e8me e2.<\/p>\n<p>Dans le cas o\u00f9 les deux \u00e9l\u00e9ments du sous-syst\u00e8me sont identiques :<\/p>\n<\/div>                <\/div>\n            <\/div>\n        \n                    <div\n                class=\"h-auto order-2 mb-8 md:mb-0   overflow-hidden shadow-content-image w-full md:w-1\/2\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"26\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-4-150x26.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"16\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-4-300x16.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 493px)\"\r\n                                width=\"493\"\r\n                                height=\"26\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-4.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 493px)\"\r\n                                width=\"493\"\r\n                                height=\"26\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-4.png.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full mx-auto\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/06\/download-4.png.webp\"\r\n                                                        title=\"download (4)\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n    <\/div>\n        <\/section>\n\n    \n\n\n\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 md:block\">\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>Les syst\u00e8mes de l&rsquo;architecture D ont un HFT = 1. Cela signifie que le<strong> SIL maximal r\u00e9alisable<\/strong> est \u00e9gal \u00e0 <strong>SIL3<\/strong>.<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>Un syst\u00e8me de contr\u00f4le de s\u00e9curit\u00e9 (SCS), analys\u00e9 avec la m\u00e9thode simplifi\u00e9e recommand\u00e9e par la IEC 62061, doit \u00eatre compos\u00e9 de sous-syst\u00e8mes, dont chacun doit \u00eatre associ\u00e9 \u00e0 l&rsquo;une des quatre architectures de sous-syst\u00e8mes de base, d\u00e9crites ci-apr\u00e8s.<\/p>\n","protected":false},"author":182,"featured_media":36447,"parent":36437,"menu_order":1,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[165],"class_list":["post-36454","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-normes-iec"],"acf":{"sottotitolo":"","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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