{"product_id":"yokogawa-sdv521-s33-s2-digital-output-unit","title":"Yokogawa SDV521-S33 S2 Digital Output Unit","description":"\u003ch2\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSDV521-S33 S2\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a high-capacity\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esafety digital output module\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edesigned for the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eYokogawa ProSafe-RS Safety Instrumented System (SIS)\u003c\/strong\u003e. Unlike standard high-density modules, it provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e4 isolated current-source output channels\u003c\/strong\u003e, each capable of delivering up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2 A\u003c\/strong\u003e, making it ideal for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eheavy-duty field devices\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003esuch as large solenoid valves and high-power signaling equipment that exceed standard 0.6 A module capacity.\u003c\/p\u003e\n\u003cp\u003eManufactured in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eJapan\u003c\/strong\u003e, the SDV521-S33 S2 meets\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSIL3 safety certification\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003estandards, featuring\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003econtinuous hardware integrity checks\u003c\/strong\u003e. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eS2 revision\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eindicates an optimized hardware build with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eenhanced thermal stability\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor sustained high-current operation. The module can be configured in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eredundant pairs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor maximum process availability.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Channels\u003c\/td\u003e\n\u003ctd\u003e4 channels, module-to-channel isolation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eCurrent source (sourcing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Output Voltage\u003c\/td\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Voltage Drop\u003c\/td\u003e\n\u003ctd\u003e1 V DC at full load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Load Current\u003c\/td\u003e\n\u003ctd\u003e2.0 A per channel (8 A total module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin Load Current\u003c\/td\u003e\n\u003ctd\u003e100 mA (required for diagnostic pulse testing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoad Resistance Range\u003c\/td\u003e\n\u003ctd\u003e12 Ω – 240 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExternal Power Supply\u003c\/td\u003e\n\u003ctd\u003e24 V DC (10 A minimum recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Level\u003c\/td\u003e\n\u003ctd\u003eSIL3 certified (ProSafe-RS ESD systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e≤ 40 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e0.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eIndustrial Application\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe SDV521-S33 S2 is used in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eheavy industrial sectors\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewhere high-current actuation is required:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePower generation facilities\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePetrochemical and chemical refineries\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIt is ideal for driving\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehigh-wattage actuators\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand executing\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eenergize-to-trip safety functions\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewhere standard 0.6 A modules are insufficient, ensuring reliable operation in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eEmergency Shutdown (ESD)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003escenarios.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the minimum load current 100 mA?\u003c\/strong\u003e\u003cbr\u003eThe SDV521-S33 S2 is a high-power driver. A minimum load of 100 mA is required for its\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003einternal pulse-test diagnostics\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto accurately monitor line faults. Loads below this threshold may trigger false\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eopen-loop alarms\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this module be used in a redundant configuration?\u003c\/strong\u003e\u003cbr\u003eYes. In a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edual-redundant setup\u003c\/strong\u003e, two SDV521-S33 S2 modules operate in parallel to ensure that, if one module fails, the connected final control elements continue to operate safely without interruption.\u003c\/p\u003e","brand":"YOKOGAWA","offers":[{"title":"Default Title","offer_id":51706907885880,"sku":"SDV521-S33 S2","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/SDV521-S331.jpg?v=1770083113","url":"https:\/\/www.automodulexpert.com\/products\/yokogawa-sdv521-s33-s2-digital-output-unit","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}