{"id":3251,"date":"2023-01-04T16:23:12","date_gmt":"2023-01-04T15:23:12","guid":{"rendered":"https:\/\/www.gt-engineering.it\/normative-tecniche\/%tipologia_normativa%\/en-iso-14119-interlocking\/"},"modified":"2025-01-29T10:44:05","modified_gmt":"2025-01-29T09:44:05","slug":"en-iso-14119-interlocking","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/en-iso-14119-interlocking\/","title":{"rendered":"EN ISO 14119: 2024 &#8211; Interlocking devices associated with guards"},"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-right ml-6 md:ml-4 lg:ml-8 xl:ml-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\/Cover-Inside-7-150x150.jpg\"\r\n                                type=\"image\/jpeg\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 225px)\"\r\n                                width=\"225\"\r\n                                height=\"300\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Cover-Inside-7-225x300.jpg\"\r\n                                type=\"image\/jpeg\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"1024\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Cover-Inside-7-768x1024.jpg\"\r\n                                type=\"image\/jpeg\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"1024\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/Cover-Inside-7-768x1024.jpg\"\r\n                                type=\"image\/jpeg\"\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\/Cover-Inside-7-scaled.jpg\"\r\n                                                        title=\"Cover Inside\"\r\n                                                        type=\"image\/jpeg\"\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 style=\"text-align: justify;\">A new edition of the <strong>EN ISO 14119<\/strong> &#8220;Safety of machinery &#8211; Interlocking devices associated with guards &#8211; Principles for design and selection&#8221; <strong>was published in September 2024<\/strong>, replacing the 2013 edition.<\/p>\n<p style=\"text-align: justify;\">This is a <strong>type B2 <\/strong>technical standard regarding a particular <strong>protective system<\/strong> against hazards: the <strong>Interlocking device <\/strong>that can come with or without a guard lock.<\/p>\n<p style=\"text-align: justify;\">The scope of the standard is to specify the principles for the <strong>design<\/strong> and <strong>selection<\/strong> of interlocking devices and to provide measures to <strong>minimize the possibility of defeat and bypass<\/strong> of interlocking devices, in a reasonably foreseeable manner. In the new document the section regarding the Trapped keys has been extended and completed, as this topic was only partially analised in the previous edition.<\/p>\n<p>Hereafter the main changes:<\/p>\n<ul>\n<li>Inclusion of the <strong>Trapped keys<\/strong>, were covered by ISO TS 19837: 2018 \u201cSafety of machinery \u2013 Trapped Key interlocking device \u2013 Principles for design and selection\u201d. The Trapped keys are classified as &#8220;<strong>Type 5 interlocking devices<\/strong>&#8220;. The TR was withdrawn in December 2024.<\/li>\n<li>Inclusion of\u00a0<strong>Fault Masking criterias, <\/strong>was covered by ISO TR 24119: 2015 \u201cSafety of machinery \u2013 Evaluation of the serial link for masking faults of interlocking devices associated with protections with potential free contacts\u201d;<\/li>\n<li>Specific indications for\u00a0<strong>Table 3<\/strong>: \u201cAdditional measures against defeating interlocking devices depending on type\u201d.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">In general, ISO 14119 also provides:<\/p>\n<ul>\n<li style=\"text-align: justify;\">Requirements for the design and the installation of interlocking devices with and without guard locking;<\/li>\n<li style=\"text-align: justify;\">Additional requirements on guard locking devices if its application creates hazards;<\/li>\n<li style=\"text-align: justify;\">Control requirements.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">The choice and the correct application of a particular type of interlocking device among the <strong>5 types<\/strong> classified by the Standard is determined by the risk assessment.<\/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=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/1-3-150x150.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=\"270\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/1-3-300x270.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 767px)\"\r\n                                width=\"767\"\r\n                                height=\"690\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/1-3.jpg.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 767px)\"\r\n                                width=\"767\"\r\n                                height=\"690\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/01\/1-3.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\/1-3.jpg.webp\"\r\n                                                        title=\"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 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 style=\"text-align: justify;\">An interlocking device consists of several parts, an example is shown in the figure on the left:<\/p>\n<p style=\"text-align: justify;\">1. Guard<\/p>\n<p style=\"text-align: justify;\">2. Interlocking Device<\/p>\n<p style=\"text-align: justify;\">3. Actuator<\/p>\n<p style=\"text-align: justify;\">4. Position Switch<\/p>\n<p style=\"text-align: justify;\">5. Actuating System<\/p>\n<p style=\"text-align: justify;\">6. Output System<\/p>\n<p>&nbsp;<\/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>EN ISO 14119: Interlocking device associated with guards<\/p>\n","protected":false},"author":1,"featured_media":3252,"parent":0,"menu_order":48,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[57],"class_list":["post-3251","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-en-iso-standards"],"acf":{"sottotitolo":"EN ISO 14119: Interlocking device associated with guards","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>EN ISO 14119: Interlocking device associated with guards<\/title>\n<meta name=\"description\" content=\"EN ISO 14119: Interlocking device 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