{"product_id":"abb-do821-3bse013250r1-isolated-nc-relay-module","title":"ABB DO821 3BSE013250R1 Isolated NC Relay Module","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB DO821\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a specialized 8-channel relay output module designed for the S800 I\/O system. Unlike standard \"Normally Open\" (NO) modules, the DO821 features\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eNormally Closed (NC)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003econtacts. This makes it an essential component for safety-interlocking or fail-safe circuits where a signal must remain closed during normal operation or in the event of a logic power loss. With individual galvanic isolation for every channel, it safely manages a broad range of voltages from 24V to 230V AC or DC.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eCore Performance Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNormally Closed (NC) Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe contacts remain closed when the module is unpowered or the output is \"Off,\" providing a hardware-level fail-safe for critical control loops.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Channel Independence:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEvery channel is individually isolated, allowing you to switch different voltage phases or independent power sources (AC and DC) within a single module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Switching Capacity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eCapable of handling\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e3A per channel\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor AC loads (with\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"math-inline\"\u003e$\\cos \\phi \u0026gt; 0.4$\u003c\/span\u003e) and up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e42W for DC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eapplications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eUniversal Voltage Range:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOperates across a wide spectrum from 24V to 230V AC\/DC, eliminating the need for external interposing relays in many high-voltage scenarios.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIndustrial Durability:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEngineered to withstand harsh environments, the module fits a slim 45mm profile to maximize DIN rail density.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Breakdown\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3BSE013250R1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDesignation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDO821\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Type:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eRelay (Normally Closed)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eChannel Count:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e8 (Individually Isolated)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMax Current:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e3A (AC) \/ 42W (DC)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e24–230V AC\/DC\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e119mm (H) x 45mm (W) x 102mm (D)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eNet Weight:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e0.3 kg\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":46602332373182,"sku":"DO821 3BSE013250R1 Isolated","price":650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/1_adf33f92-fdd1-4f97-befa-0677f17f967b.png?v=1776071759","url":"https:\/\/www.autooiltech.com\/products\/abb-do821-3bse013250r1-isolated-nc-relay-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}