{"id":3344,"date":"2023-01-04T16:35:09","date_gmt":"2023-01-04T15:35:09","guid":{"rendered":"https:\/\/www.gt-engineering.it\/normative-tecniche\/%tipologia_normativa%\/requisiti-generali\/"},"modified":"2026-02-09T09:10:00","modified_gmt":"2026-02-09T08:10:00","slug":"4-1-general-requirements","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iso-standards\/emergency-sto-en-13850\/4-1-general-requirements\/","title":{"rendered":"4.1: General requirements"},"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                    <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<h4 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                    What is the emergency button for?    <\/h4>\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\/01\/4.1-General-requirements-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\/4.1-General-requirements-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\/4.1-General-requirements-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\/4.1-General-requirements-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\/4.1-General-requirements-scaled.jpg\"\r\n                                                        title=\"4.1 General requirements\"\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>The function of the Emergency Stop is:<\/p>\n<blockquote>\n<p><strong>4.1.1.1<\/strong> [&#8230;] to&nbsp;<em>avert&nbsp;actual or impeding&nbsp;emergency situations arising&nbsp;from the behavior of persons or from an unexpected hazardous&nbsp;event.<\/em><\/p>\n<\/blockquote>\n<p>Its function is not to reduce the risk present in a Hazardous Situation, as intended for&nbsp;protection devices, but to stop the operation of a machine as quickly as possible if it causes damage or accidents, thus giving place in an Emergency Situation. The term <strong>Emergency Situation <\/strong>means a Hazardous&nbsp;Situation, caused by human interactions or as result of external influences, which<strong> needs to be urgently ended or averted&nbsp;<\/strong>due to the gravity of the consequences of this event.<\/p>\n<p>The Emergency Stop&nbsp;should <strong>not be considered as a substitute for other protection measure<\/strong>s:<\/p>\n<blockquote>\n<p><strong>4.1.1.3&nbsp;<\/strong><em>[&#8230;]<\/em>&nbsp;<em>is a complementary protective&nbsp;measure and shall&nbsp;not be applied as a substitute for safeguarding measures and other functions or safety functions.<\/em><strong>&nbsp;<\/strong><\/p>\n<\/blockquote>\n<p>In front of a conveyor belt, which presents risks of crushing, the problem is not solved by installing an emergency rope!<\/p>\n<p>In addition, the emergency push button&nbsp;cannot be placed behind a door&nbsp;because activating it requires two actions: opening the door&nbsp;and activating the function. If the problem is the prevention of unintended actuation see paragraph 4.5 of the Standard.<\/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<h4 class=\"a-heading text-primary font-heading text-2xl lg:text-3xl xl:text-4xl normal mt-2 first:mt-0\">\n                    What movements should be stopped? Is it possible for the emergency to activate the movements?    <\/h4>\n        <\/div>\n                <\/div>\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>The emergency stop does not amount to a de-energization of the machine: only hazard movements and operations are stopped.In addition, if safety involves the activation of a movement, this is not only permissible but mandatory: &quot;the emergency stop function can initiate other functions, other than stopping, to minimize the risk of harm (e.g reversal or limitation of motion, rate of braking) &quot;.<\/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<h4 class=\"a-heading text-primary font-heading text-2xl lg:text-3xl xl:text-4xl normal mt-2 first:mt-0\">\n                    What is The Span of Control?    <\/h4>\n        <\/div>\n                <\/div>\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>The&nbsp;standard EN 13850 of November 2015, introduces the concept of span of control of emergency stop device. &nbsp;This expression identifies the portion of the machine area on which the emergency stop device takes effect.&nbsp;<\/p>\n<blockquote>\n<p><strong>4.1.2&nbsp; <\/strong>The span of control of each emergency stop device shall&nbsp;cover the whole&nbsp;machine. As an exception, a single span&nbsp;of control&nbsp;may n<strong>ot be appropriate <\/strong>when, for example, stopping all linked&nbsp;machinery&nbsp;could create additional hazards <strong>or unnecessaryly affect production.<\/strong>&nbsp;<\/p>\n<\/blockquote>\n<p>A machine should be covered by a single span of control. However, not necessarily all emergency buttons have to stop the entire production line. In this case, you define several span of control associated with different emergency stop devices. <em>Each span of control can cover&nbsp;one or more sections of a machine, an entire machine, or groups of machines.<\/em> The use of a single span&nbsp;of control on multiple machines may not be indicated when the blocking of all machinery connected to this area causes further hazards or affects production in an unnecessary way.<\/p>\n<p>The assignment of multiple span of control&nbsp; shall&nbsp;be made so that each of them is easily recognizable and associated with its emergency stop device. By doing so in case of danger you are able to immediately resort to the stop device of interest. In this regard, at the end of paragraph 4.1.2.1 of the rule:<\/p>\n<p>More than one span of control can be applied if the spans of control shall be clearly defined and identifiable and the emergency stop devices shall be readily associated with the hazard requiribg an emergency stop.&nbsp;In this regard, at the end of paragraph 4.1.2.1 of the standard:<\/p>\n<blockquote>\n<p><strong>4.1.2.1 <\/strong>So<em>&nbsp;far as practicable, emergency stop devices with different spans of control shall&nbsp;not be located near each other.<\/em><\/p>\n<\/blockquote>\n<p>Actuation&nbsp;of an emergency stop device in one span of control shall&nbsp;not create additional hazards or increase the risk in any&nbsp;span of control, and shall not prevent the initiation of an mergency stop functions. In addition, they shall&nbsp;be defined taking into account adjacent hazards.&nbsp;<\/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\"\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=\"m-headings\"\n            >\n    \n    \n<h4 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                    What level of reliability should the Emergency Stop function have?    <\/h4>\n        <\/div>\n    \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <blockquote>\n<p><strong>4.1.5.1&nbsp;<\/strong>[&#8230;] <em>Determination of the Performance level (PL) or SIL required should take into account the purpose of the emergency rest function, but the minimum required level is PLr c or SIL 1.<\/em><\/p>\n<\/blockquote>\n<p>This is a novelty introduced in the latest edition of the standard. The performance level&nbsp;depends on the type of machinery; in any case, the minimum level is PL-c.<\/p>\n<\/div>                <\/div>\n            <\/div>\n        \n        \n    <\/div>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>The function of the emergency stop is not to reduce the risk present in Hazardous Situation but to stop the operation of a machine as quickly as possibile <\/p>\n","protected":false},"author":1,"featured_media":3345,"parent":3210,"menu_order":1,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[57],"class_list":["post-3344","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-en-iso-standards"],"acf":{"sottotitolo":"PULSANTE DI EMERGENZA - MOVIMENTI DA ARRESTARE - AMPIEZZA DI COMANDO - LIVELLI DI AFFIDABILIT\u00c0","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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