{"id":6837,"date":"2026-01-08T15:06:31","date_gmt":"2026-01-08T15:06:31","guid":{"rendered":"https:\/\/www.kwadrant-ia.nl\/standards\/sil2-sil3-safety-plc-for-process-industry\/"},"modified":"2026-06-09T11:17:08","modified_gmt":"2026-06-09T11:17:08","slug":"sil2-sil3-safety-plc-for-process-industry","status":"publish","type":"page","link":"https:\/\/www.kwadrant-ia.nl\/en\/standards\/sil2-sil3-safety-plc-for-process-industry\/","title":{"rendered":"Safety Instrumented System (SIS) and safety PLC"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"6837\" class=\"elementor elementor-6837 elementor-6421\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8370b0f e-flex e-con-boxed e-con e-parent\" data-id=\"8370b0f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-9d08a8c e-con-full e-flex e-con e-child\" data-id=\"9d08a8c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-238155e elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"238155e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">In accordance with IEC 61511 and IEC 61508<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">From SIL classification to safe execution<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M173.898 439.404l-166.4-166.4c-9.997-9.997-9.997-26.206 0-36.204l36.203-36.204c9.997-9.998 26.207-9.998 36.204 0L192 312.69 432.095 72.596c9.997-9.997 26.207-9.997 36.204 0l36.203 36.204c9.997 9.997 9.997 26.206 0 36.204l-294.4 294.401c-9.998 9.997-26.207 9.997-36.204-.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Safety separated from regular process control<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cdb15c4 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"cdb15c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-arrow-alt-circle-right\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M504 256C504 119 393 8 256 8S8 119 8 256s111 248 248 248 248-111 248-248zm-448 0c0-110.5 89.5-200 200-200s200 89.5 200 200-89.5 200-200 200S56 366.5 56 256zm72 20v-40c0-6.6 5.4-12 12-12h116v-67c0-10.7 12.9-16 20.5-8.5l99 99c4.7 4.7 4.7 12.3 0 17l-99 99c-7.6 7.6-20.5 2.2-20.5-8.5v-67H140c-6.6 0-12-5.4-12-12z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Schedule a technical consultation<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-852ffa3 e-flex e-con-boxed e-con e-parent\" data-id=\"852ffa3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-a738f15 e-con-full e-flex e-con e-child\" data-id=\"a738f15\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2e3a714 elementor-widget elementor-widget-heading\" data-id=\"2e3a714\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is a Safety Instrumented System?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0cc78a3 elementor-widget elementor-widget-text-editor\" data-id=\"0cc78a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"bBp5jBTYYjntkkj2CEKW7\">A Safety Instrumented System (SIS) is an independent safety system that automatically brings a process to a safe state as soon as a critical limit is exceeded. The SIS is separate from regular process control and consists of three links: sensors that monitor the process, a logic solver (the safety PLC) that executes the <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/software-engineering\/\">safety logic<\/a>, and end elements such as valves that intervene. Each SIS performs one or more safety instrumented functions, each with a required Safety Integrity Level (SIL) that indicates how reliable the function must be. In the process industry, these systems are designed and assessed according to IEC 61511.   <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"Botdknp3nzOSvMiMnAdzM\">An SIS thus forms a separate layer of protection on top of the normal control. It is precisely this separation between process control and process safety that makes the system reliable: a failure in the regular control should never be able to affect the safety function. Including the safety architecture early on in the design creates a manageable and reproducible setup that meets the requirements of modern process environments.  <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"bjnKtnGEJEnCsn1K0Rh6K\"> <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b27e08f elementor-widget elementor-widget-text-editor\" data-id=\"b27e08f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"bjnKtnGEJEnCsn1K0Rh6K\">Functional safety has two worlds. For machines and plants, <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/software-engineering\/machine-safety\/\">machine safety<\/a> applies, expressed in Performance Levels. For process installations, process safety applies, expressed in SIL. This page deals with the process side.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6c2a9b1 e-con-full e-flex e-con e-parent\" data-id=\"6c2a9b1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2194a1c elementor-widget elementor-widget-template\" data-id=\"2194a1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"section\" data-elementor-id=\"3440\" class=\"elementor elementor-3440 elementor-3437 elementor-3437\" data-elementor-post-type=\"elementor_library\">\n\t\t\t<div class=\"elementor-element elementor-element-2379910 e-flex e-con-boxed e-con e-parent\" data-id=\"2379910\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-10ad5de elementor-hidden-mobile e-con-full e-flex e-con e-child\" data-id=\"10ad5de\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e05c5de e-con-full e-flex e-con e-child\" data-id=\"e05c5de\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ce4eb0a elementor-widget elementor-widget-heading\" data-id=\"ce4eb0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Panel Building Pioneers for Mechanical Engineering<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d90163c elementor-widget elementor-widget-text-editor\" data-id=\"d90163c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>With the precision of a watchmaker and the agility of an acrobat, Kwadrant IA is committed to creating custom electrical panels for mechanical engineering. As a resilient player in <a href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/panel-building\/\">panel building<\/a>, we move quickly without sacrificing quality or durability. Step into our world of innovation and discover how we can take your mechanical engineering projects to the next level.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d4a264 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"2d4a264\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-circle-right\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8c137 0 248 111 248 248S393 504 256 504 8 393 8 256 119 8 256 8zm-28.9 143.6l75.5 72.4H120c-13.3 0-24 10.7-24 24v16c0 13.3 10.7 24 24 24h182.6l-75.5 72.4c-9.7 9.3-9.9 24.8-.4 34.3l11 10.9c9.4 9.4 24.6 9.4 33.9 0L404.3 273c9.4-9.4 9.4-24.6 0-33.9L271.6 106.3c-9.4-9.4-24.6-9.4-33.9 0l-11 10.9c-9.5 9.6-9.3 25.1.4 34.4z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Request an instant panel building quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d98dac7 e-flex e-con-boxed e-con e-parent\" data-id=\"d98dac7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-3911764 e-con-full e-flex e-con e-child\" data-id=\"3911764\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-59ea737 e-con-full e-flex e-con e-child\" data-id=\"59ea737\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-91d327e elementor-widget elementor-widget-heading\" data-id=\"91d327e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The structure of an SIS: sensor, logic solver, end element<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-33d375f elementor-widget elementor-widget-text-editor\" data-id=\"33d375f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"Dc8xZHNSxHAbfMcWLjG-3\">Each Safety Instrumented System follows the same chain, known as Sensor, Logic Solver, Final Element.<\/p><ul class=\"PlaygroundEditorTheme__ul\"><li class=\"PlaygroundEditorTheme__listItem\" value=\"1\"><b><strong class=\"PlaygroundEditorTheme__textBold\">Sensors:<\/strong><\/b> transmitters and level switches monitor pressure, level, temperature or flow and signal when a limit is approached.<\/li><li class=\"PlaygroundEditorTheme__listItem\" value=\"2\"><b><strong class=\"PlaygroundEditorTheme__textBold\">Logic solver (safety PLC):<\/strong><\/b> the safety PLC processes the signals and executes the safety logic. Unlike a standard PLC, the <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/hardware-engineering\/\">hardware<\/a> and <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/software-engineering\/\">software<\/a> are set up for fault detection, diagnosis and fail-safe behavior. <\/li><li class=\"PlaygroundEditorTheme__listItem\" value=\"3\"><b><strong class=\"PlaygroundEditorTheme__textBold\">End elements:<\/strong><\/b> valves, valves and actuators physically bring the process to a safe state.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa05fc1 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"aa05fc1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2724c97 elementor-widget elementor-widget-heading\" data-id=\"2724c97\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why a safety PLC and not a standard PLC?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-213111b elementor-widget elementor-widget-text-editor\" data-id=\"213111b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"EDd1-vOtE9uJAAVmtQzC1\">A safety PLC differs from a standard PLC in that both the hardware and software are designed for fault detection, diagnosis and safe fault handling. Whereas a standard PLC is optimized for process control, a safety PLC is designed to always go to a predefined safe state in the event of a fault, the fail-safe principle. To this end, the safety PLC features internal redundancy and continuous self-diagnosis, and is certified according to IEC 61508.  <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"_7d9bBdKz3W3cfxLIjAfM\">In practice, both PLC types often work side by side, with a clear separation of duties. The regular control controls the normal process, while the safety PLC performs only the safety logic. This separation prevents a failure in the process control from affecting the operation of the safety function.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-39da12e elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"39da12e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8ba06cb elementor-widget elementor-widget-heading\" data-id=\"8ba06cb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SIL levels and the IEC 61511 standard<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ed8716 elementor-widget elementor-widget-text-editor\" data-id=\"1ed8716\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"2g6eTcDuIoEnTiYHg9Ocb\">The Safety Integrity Level (SIL) indicates how reliable a safety function must be: the higher the SIL, the lower the allowable probability of failure. The standard distinguishes four levels, SIL 1 through SIL 4, each of which has a range for the Probability of Failure on Demand (PFD) and a required Hardware Fault Tolerance. Thus, a higher SIL requires not only more reliable components, but also more redundancy and better fault detection in the architecture.  <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"pFrP9eQx11sS87HWH_1Vq\">What SIL is needed does not follow from an assumption but from a risk analysis. In the process industry, this is usually done through a HAZOP (Hazard and Operability Study), followed by a LOPA (Layer of Protection Analysis), which determines how much risk reduction the Safety Instrumented System must provide. The outcome, the required safety functions with their SIL, is defined in a Safety Requirements Specification (SRS), which forms the basis for the design.  <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"PToUqCByqp1_TulEYfNJK\">This approach falls under IEC 61511, the standard for functional safety in the process industry, which is derived from the overarching IEC 61508. Both standards follow the idea of the Safety Lifecycle: from risk analysis and design, through realization and commissioning, to the operational phase with periodic pilot tests demonstrating that the system maintains its SIL. <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"1D2aIHqfuIFH_a47G-I0m\"><strong>Note<\/strong> the distinction with machine safety. For machinery, the <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/standards\/machine-safety-control-cabinets-pld-ple\/\">Performance Level<\/a> according to EN-ISO 13849 applies, while SIL and IEC 61511 belong to the process industry. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0375dfb e-con-full e-flex e-con e-child\" data-id=\"0375dfb\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-29af4a1 e-con-full e-flex e-con e-child\" data-id=\"29af4a1\" data-element_type=\"container\" data-e-type=\"container\" 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0-67.91zm-246.8-20.53c-15.62-15.62-40.94-15.62-56.56 0L75.8 172.43c-6.25 6.25-6.25 16.38 0 22.62l22.63 22.63c6.25 6.25 16.38 6.25 22.63 0l101.82-101.82 22.63 22.62L93.95 290.03A327.038 327.038 0 0 0 .17 485.11l-.03.23c-1.7 15.28 11.21 28.2 26.49 26.51a327.02 327.02 0 0 0 195.34-93.8l196.79-196.79-82.77-82.77-84.85-84.85z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3d56314 elementor-widget elementor-widget-heading\" data-id=\"3d56314\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">CONTACT US<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01fa219 elementor-widget elementor-widget-template\" data-id=\"01fa219\" data-element_type=\"widget\" data-e-type=\"widget\" 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none!important; min-inline-size: 100%;\">\n                    <legend class=\"ff_screen_reader_title\" style=\"display: block; margin: 0!important;padding: 0!important;height: 0!important;text-indent: -999999px;width: 0!important;overflow:hidden;\">Contact formulier EN (#7)<\/legend><input type='hidden' name='__fluent_form_embded_post_id' value='6837' \/><input type=\"hidden\" id=\"_fluentform_7_fluentformnonce\" name=\"_fluentform_7_fluentformnonce\" value=\"69c960d7d8\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/en\/wp-json\/wp\/v2\/pages\/6837\" \/><div data-type=\"name-element\" data-name=\"names\" class=\" ff-field_container ff-name-field-wrapper\" ><div class='ff-t-container'><div class='ff-t-cell '><div class='ff-el-group  ff-el-form-top'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_7_names_first_name_' id='label_ff_7_names_first_name_' >First Name<\/label><\/div><div class='ff-el-input--content'><input type=\"text\" name=\"names[first_name]\" id=\"ff_7_names_first_name_\" class=\"ff-el-form-control\" placeholder=\"First Name\" aria-invalid=\"false\" aria-required=true><\/div><\/div><\/div><div class='ff-t-cell '><div class='ff-el-group  ff-el-form-top'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_7_names_last_name_' id='label_ff_7_names_last_name_' >Last Name<\/label><\/div><div class='ff-el-input--content'><input type=\"text\" name=\"names[last_name]\" id=\"ff_7_names_last_name_\" class=\"ff-el-form-control\" placeholder=\"Last Name\" aria-invalid=\"false\" aria-required=true><\/div><\/div><\/div><\/div><\/div><div data-type=\"name-element\" data-name=\"names_1\" class=\" ff-field_container ff-name-field-wrapper\" ><div class='ff-t-container'><div class='ff-t-cell '><div class='ff-el-group  ff-el-form-top'><div class=\"ff-el-input--label ff-el-is-required asterisk-right\"><label for='ff_7_names_1_first_name_' id='label_ff_7_names_1_first_name_' >Company 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{\"id\":\"7\",\"ajaxUrl\":\"https:\\\/\\\/www.kwadrant-ia.nl\\\/wp-admin\\\/admin-ajax.php\",\"settings\":{\"layout\":{\"labelPlacement\":\"top\",\"helpMessagePlacement\":\"with_label\",\"errorMessagePlacement\":\"inline\",\"cssClassName\":\"\",\"asteriskPlacement\":\"asterisk-right\"},\"restrictions\":{\"denyEmptySubmission\":{\"enabled\":false}}},\"form_instance\":\"ff_form_instance_7_1\",\"form_id_selector\":\"fluentform_7\",\"rules\":{\"names[first_name]\":{\"required\":{\"value\":true,\"message\":\"This field is required\"}},\"names[middle_name]\":{\"required\":{\"value\":false,\"message\":\"This field is required\"}},\"names[last_name]\":{\"required\":{\"value\":true,\"message\":\"This field is required\"}},\"names_1[first_name]\":{\"required\":{\"value\":true,\"message\":\"Dit veld is verplicht\"}},\"names_1[middle_name]\":{\"required\":{\"value\":false,\"message\":\"This field is required\"}},\"names_1[last_name]\":{\"required\":{\"value\":false,\"message\":\"This field is required\"}},\"email\":{\"required\":{\"value\":true,\"message\":\"Dit veld is verplicht\"},\"email\":{\"value\":true,\"message\":\"Dit veld moet een correct mailadres bevatten\"}},\"phone\":{\"required\":{\"value\":false,\"message\":\"This field is required\"},\"valid_phone_number\":{\"value\":false,\"message\":\"Phone number is not valid\"}},\"description\":{\"required\":{\"value\":true,\"message\":\"This field is required\"}}},\"debounce_time\":300,\"file_upload_settings\":[]};\n                            <\/script>\n                        <\/div>\n\n            \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-54d0a73 e-flex e-con-boxed e-con e-parent\" data-id=\"54d0a73\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-e22e624 e-con-full e-flex e-con e-child\" data-id=\"e22e624\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-2b39393 e-con-full e-flex e-con e-child\" data-id=\"2b39393\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1a69c3a elementor-widget elementor-widget-heading\" data-id=\"1a69c3a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Where is an SIS applied?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c8e74df elementor-widget elementor-widget-text-editor\" data-id=\"c8e74df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"5n6EcTyN75uFoJBpxGdHj\">Safety Instrumented Systems are deployed where process risks can have major consequences for people, plant and environment.<\/p><ul class=\"PlaygroundEditorTheme__ul\"><li class=\"PlaygroundEditorTheme__listItem\" value=\"1\"><b><strong class=\"PlaygroundEditorTheme__textBold\">Emergency shutdown (ESD):<\/strong><\/b> Safe shutdown of a plant during hazardous process conditions.<\/li><li class=\"PlaygroundEditorTheme__listItem\" value=\"2\"><b><strong class=\"PlaygroundEditorTheme__textBold\">Process protection:<\/strong><\/b> Monitoring against exceeding pressure, level or temperature.<\/li><li class=\"PlaygroundEditorTheme__listItem\" value=\"3\"><b><strong class=\"PlaygroundEditorTheme__textBold\">Fire &#038; gas systems:<\/strong><\/b> Fire or gas detection and intervention.<\/li><li class=\"PlaygroundEditorTheme__listItem\" value=\"4\"><b><strong class=\"PlaygroundEditorTheme__textBold\">Boiler and burner protection:<\/strong><\/b> safe shutdown of combustion processes.<\/li><\/ul><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"pFRI9NOW-5hSGsvwZhuvh\">These systems are mainly found in the <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/sectors\/panel-construction-for-petrochemicals\/\">petrochemical<\/a>, energy, food-processing, marine and offshore industries. In ATEX environments, the safety controller is part of an explosion-proof overall design. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-64b9655 e-con-full e-flex e-con e-child\" data-id=\"64b9655\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c230273 elementor-widget elementor-widget-image\" data-id=\"c230273\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"675\" src=\"https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/03\/Weighing-and-dosing-automation.jpg\" class=\"attachment-large size-large wp-image-5450\" alt=\"Weighing and dosing automation\" srcset=\"https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/03\/Weighing-and-dosing-automation.jpg 1000w, https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/03\/Weighing-and-dosing-automation-300x203.jpg 300w, https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/03\/Weighing-and-dosing-automation-768x518.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8a77b2 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"b8a77b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-circle-right\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8c137 0 248 111 248 248S393 504 256 504 8 393 8 256 119 8 256 8zm-28.9 143.6l75.5 72.4H120c-13.3 0-24 10.7-24 24v16c0 13.3 10.7 24 24 24h182.6l-75.5 72.4c-9.7 9.3-9.9 24.8-.4 34.3l11 10.9c9.4 9.4 24.6 9.4 33.9 0L404.3 273c9.4-9.4 9.4-24.6 0-33.9L271.6 106.3c-9.4-9.4-24.6-9.4-33.9 0l-11 10.9c-9.5 9.6-9.3 25.1.4 34.4z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Please contact us<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-928a6ad e-con-full e-flex e-con e-parent\" data-id=\"928a6ad\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-addb66b elementor-widget elementor-widget-template\" data-id=\"addb66b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"container\" data-elementor-id=\"5185\" class=\"elementor elementor-5185 elementor-5172 elementor-5172\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t<div class=\"elementor-element elementor-element-609eba79 e-flex e-con-boxed e-con e-parent\" data-id=\"609eba79\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-17701e8a e-con-full e-flex e-con e-child\" data-id=\"17701e8a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-636b569d elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"636b569d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Years of experience in the field of industrial automation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-132b692b e-con-full e-flex e-con e-child\" data-id=\"132b692b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-35e9323a e-con-full e-flex e-con e-child\" data-id=\"35e9323a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1c662c86 elementor-widget__width-initial elementor-widget elementor-widget-counter\" data-id=\"1c662c86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"counter.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-counter\">\n\t\t\t<div class=\"elementor-counter-title\">Satisfied customers<\/div>\t\t\t<div class=\"elementor-counter-number-wrapper\">\n\t\t\t\t<span class=\"elementor-counter-number-prefix\"><\/span>\n\t\t\t\t<span class=\"elementor-counter-number\" data-duration=\"2000\" data-to-value=\"115\" data-from-value=\"0\" data-delimiter=\",\">0<\/span>\n\t\t\t\t<span class=\"elementor-counter-number-suffix\">+<\/span>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-39ad1c07 e-con-full e-flex e-con e-child\" data-id=\"39ad1c07\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-40a3e7f5 elementor-widget__width-initial elementor-widget elementor-widget-counter\" data-id=\"40a3e7f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"counter.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-counter\">\n\t\t\t<div class=\"elementor-counter-title\">Panels built<\/div>\t\t\t<div class=\"elementor-counter-number-wrapper\">\n\t\t\t\t<span class=\"elementor-counter-number-prefix\"><\/span>\n\t\t\t\t<span class=\"elementor-counter-number\" data-duration=\"2000\" data-to-value=\"5500\" data-from-value=\"0\" data-delimiter=\",\">0<\/span>\n\t\t\t\t<span class=\"elementor-counter-number-suffix\">+<\/span>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6b21f41 e-con-full e-flex e-con e-child\" data-id=\"6b21f41\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61f54eaf elementor-widget__width-initial elementor-widget elementor-widget-counter\" data-id=\"61f54eaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"counter.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-counter\">\n\t\t\t<div class=\"elementor-counter-title\">Years of experience<\/div>\t\t\t<div class=\"elementor-counter-number-wrapper\">\n\t\t\t\t<span class=\"elementor-counter-number-prefix\"><\/span>\n\t\t\t\t<span class=\"elementor-counter-number\" data-duration=\"2000\" data-to-value=\"26\" data-from-value=\"0\" data-delimiter=\",\">0<\/span>\n\t\t\t\t<span class=\"elementor-counter-number-suffix\">+<\/span>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-87c6475 e-con-full e-flex e-con e-parent\" data-id=\"87c6475\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-edda1bd elementor-widget elementor-widget-template\" data-id=\"edda1bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"template.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-template\">\n\t\t\t\t\t<div data-elementor-type=\"container\" data-elementor-id=\"5187\" class=\"elementor elementor-5187 elementor-5169 elementor-5169\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t<div class=\"elementor-element elementor-element-58434fd e-flex e-con-boxed e-con e-parent\" data-id=\"58434fd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-c227ed1 e-con-full e-flex e-con e-child\" data-id=\"c227ed1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bb90145 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"bb90145\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Industrial automation with international standards\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a894a59 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a894a59\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">Industrial automation requires more than just a correctly constructed panel. We start with the architecture of the system and make conscious choices in component selection, standardization and scalability. By fully mastering engineering, panel construction and integration, we realize control systems that perform reliably in demanding industrial environments. From modular construction to international compliance, every detail is focused on quality, longevity and manageable Total Cost of Ownership.   <\/p><p class=\"p1\"><strong><em>We do not build standard solutions, but technically sound systems that match the complexity of modern mechanical engineering.<\/em><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64d4a59 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"64d4a59\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-circle-right\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8c137 0 248 111 248 248S393 504 256 504 8 393 8 256 119 8 256 8zm-28.9 143.6l75.5 72.4H120c-13.3 0-24 10.7-24 24v16c0 13.3 10.7 24 24 24h182.6l-75.5 72.4c-9.7 9.3-9.9 24.8-.4 34.3l11 10.9c9.4 9.4 24.6 9.4 33.9 0L404.3 273c9.4-9.4 9.4-24.6 0-33.9L271.6 106.3c-9.4-9.4-24.6-9.4-33.9 0l-11 10.9c-9.5 9.6-9.3 25.1.4 34.4z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">See all services<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b84ff98 elementor-arrows-position-inside elementor-invisible elementor-widget elementor-widget-image-carousel\" data-id=\"b84ff98\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;slides_to_show&quot;:&quot;4&quot;,&quot;slides_to_show_tablet&quot;:&quot;3&quot;,&quot;navigation&quot;:&quot;arrows&quot;,&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;lazyload&quot;:&quot;yes&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_hover&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;infinite&quot;:&quot;yes&quot;,&quot;speed&quot;:500,&quot;image_spacing_custom&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:20,&quot;sizes&quot;:[]},&quot;image_spacing_custom_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;image_spacing_custom_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"image-carousel.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-image-carousel-wrapper swiper\" role=\"region\" aria-roledescription=\"carousel\" aria-label=\"Afbeelding carrousel\" dir=\"ltr\">\n\t\t\t<div class=\"elementor-image-carousel swiper-wrapper swiper-image-stretch\" aria-live=\"off\">\n\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"1 of 4\"><figure class=\"swiper-slide-inner\"><img class=\"swiper-slide-image swiper-lazy\" data-src=\"https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2026\/02\/Paneelbouw-voor-machinebouw-_-Kwadrant-IA-768x512.jpg\" alt=\"Panel construction for mechanical engineering _ Kwadrant IA\" \/><div class=\"swiper-lazy-preloader\"><\/div><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"2 of 4\"><figure class=\"swiper-slide-inner\"><img class=\"swiper-slide-image swiper-lazy\" data-src=\"https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2026\/02\/Paneelbouw-_-Kwadrant-IA-768x512.jpg\" alt=\"Panel construction _ Kwadrant IA\" \/><div 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850 308 863 321 871 338 875 354 875 371 875 388 867 400 854L696 533Z\"><\/path><\/svg>\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f68acd1 e-flex e-con-boxed e-con e-parent\" data-id=\"f68acd1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-e9359b1 e-con-full e-flex e-con e-child\" data-id=\"e9359b1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-67825cf e-con-full e-flex e-con e-child\" data-id=\"67825cf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7f1d2fe elementor-widget elementor-widget-image\" data-id=\"7f1d2fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"675\" src=\"https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/02\/Complete-paneelbouwoplossingen-voor-de-foodindustrie.jpg\" class=\"attachment-large size-large wp-image-5259\" alt=\"Complete panel building solutions for the food industry\" srcset=\"https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/02\/Complete-paneelbouwoplossingen-voor-de-foodindustrie.jpg 1000w, https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/02\/Complete-paneelbouwoplossingen-voor-de-foodindustrie-300x203.jpg 300w, https:\/\/www.kwadrant-ia.nl\/wp-content\/uploads\/2025\/02\/Complete-paneelbouwoplossingen-voor-de-foodindustrie-768x518.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e63637 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"6e63637\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/contact\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-circle-right\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8c137 0 248 111 248 248S393 504 256 504 8 393 8 256 119 8 256 8zm-28.9 143.6l75.5 72.4H120c-13.3 0-24 10.7-24 24v16c0 13.3 10.7 24 24 24h182.6l-75.5 72.4c-9.7 9.3-9.9 24.8-.4 34.3l11 10.9c9.4 9.4 24.6 9.4 33.9 0L404.3 273c9.4-9.4 9.4-24.6 0-33.9L271.6 106.3c-9.4-9.4-24.6-9.4-33.9 0l-11 10.9c-9.5 9.6-9.3 25.1.4 34.4z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Please contact us<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-20b362b e-con-full e-flex e-con e-child\" data-id=\"20b362b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9c996d7 elementor-widget elementor-widget-heading\" data-id=\"9c996d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Kwadrant IA as a partner for functional safety<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-94a1ec5 elementor-widget elementor-widget-text-editor\" data-id=\"94a1ec5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"aw05xSL4dQ3Ef_lZrpGvh\">Kwadrant IA designs and builds control systems that include functional safety from the very beginning. From the translation of the risk analysis into a Safety Requirements Specification, via the engineering (often with EPLAN) and <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/panel-building\/\">panel construction<\/a> of the safety system according to NEN-EN 61439 and UL 508A, to <a class=\"PlaygroundEditorTheme__link\" href=\"https:\/\/www.kwadrant-ia.nl\/en\/services\/commissioning\/\">validation<\/a> with a Factory Acceptance Test and Site Acceptance Test. With engineering, panel building and software in-house, the separation between process control and safety remains guaranteed, with open calculation, a quotation within five working days and UL\/CSA in-house for international projects.  <\/p><p class=\"PlaygroundEditorTheme__paragraph\" dir=\"ltr\" data-paragraph-uuid=\"dAViL_0ZoQPr2F3BB10c0\">With experience in petrochemical, marine and offshore, infrastructure and water management, among others, this approach suits a variety of process plants.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-74152b4 e-flex e-con-boxed e-con e-parent\" data-id=\"74152b4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-b316490 e-con-full e-flex e-con e-child\" data-id=\"b316490\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-665ae54 elementor-widget elementor-widget-heading\" data-id=\"665ae54\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently asked questions about Safety Instrumented Systems\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5408a52 e-flex e-con-boxed e-con e-parent\" data-id=\"5408a52\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-3255478 e-con-full e-flex e-con e-child\" data-id=\"3255478\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7e3de03 elementor-widget elementor-widget-n-accordion\" data-id=\"7e3de03\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;all_collapsed&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1320\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1320\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What is a Safety Instrumented System (SIS)?   <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1320\" class=\"elementor-element elementor-element-8686b59 e-con-full e-flex e-con e-child\" data-id=\"8686b59\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b0eb8c9 elementor-widget elementor-widget-text-editor\" data-id=\"b0eb8c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">An SIS is an independent safety system that automatically brings a process to a safe state in the event of a critical deviation. It consists of sensors, a logic solver (safety PLC) and end elements, and performs one or more safety instrumented functions. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1321\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1321\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What is the difference between an SIS and a DCS or standard controller?   <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1321\" class=\"elementor-element elementor-element-36a00bd e-con-full e-flex e-con e-child\" data-id=\"36a00bd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4f42588 elementor-widget elementor-widget-text-editor\" data-id=\"4f42588\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">The regular control (such as a DCS) controls the normal process; the SIS intervenes only if safety is compromised. The two are deliberately separated so that a failure in the process control cannot affect the safety function. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1322\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1322\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What does SIL mean in a Safety Instrumented System?   <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1322\" class=\"elementor-element elementor-element-8feb6f0 e-con-full e-flex e-con e-child\" data-id=\"8feb6f0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2780e06 elementor-widget elementor-widget-text-editor\" data-id=\"2780e06\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">SIL (Safety Integrity Level) indicates how reliable a safety function must be, expressed in terms of the allowable failure rate. The required SIL follows from a risk analysis and is realized according to IEC 61511. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1323\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1323\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What is the difference between IEC 61511 and IEC 61508?   <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1323\" class=\"elementor-element elementor-element-a980b06 e-con-full e-flex e-con e-child\" data-id=\"a980b06\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c95a69e elementor-widget elementor-widget-text-editor\" data-id=\"c95a69e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">IEC 61508 is the umbrella standard for functional safety; IEC 61511 is its application specifically to the process industry. Component manufacturers work according to 61508, while the design of an SIS in a process plant is covered by 61511. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1324\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1324\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><h3 class=\"e-n-accordion-item-title-text\"> What is the difference between SIL and Performance Level (PL)?   <\/h3><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1324\" class=\"elementor-element elementor-element-dae363a e-con-full e-flex e-con e-child\" data-id=\"dae363a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4a91109 elementor-widget elementor-widget-text-editor\" data-id=\"4a91109\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"p1\">SIL belongs to the process industry (IEC 61511 and 61508), PL belongs to machine safety (EN-ISO 13849). Both express the reliability of a safety function, but within different standards frameworks. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is a Safety Instrumented System (SIS)?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"An SIS is an independent safety system that automatically brings a process to a safe state in the event of a critical deviation. It consists of sensors, a logic solver (safety PLC) and end elements, and performs one or more safety instrumented functions.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between an SIS and a DCS or standard controller?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The regular control (such as a DCS) controls the normal process; the SIS intervenes only if safety is compromised. 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A Safety Instrumented System (SIS) is an independent safety system that automatically brings a process to a safe state as soon as a critical limit [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":6423,"parent":5959,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-6837","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/pages\/6837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/comments?post=6837"}],"version-history":[{"count":13,"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/pages\/6837\/revisions"}],"predecessor-version":[{"id":7891,"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/pages\/6837\/revisions\/7891"}],"up":[{"embeddable":true,"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/pages\/5959"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/media\/6423"}],"wp:attachment":[{"href":"https:\/\/www.kwadrant-ia.nl\/en\/wp-json\/wp\/v2\/media?parent=6837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}