{"product_id":"do821-3bse013250r1-abb-i-o-transistor-digital-output-module","title":"DO821 3BSE013250R1 ABB I\/O Transistor Digital Output Module","description":"\u003ch2\u003eABB DO821 3BSE013250R1 S800 I\/O Digital Output Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for high-speed digital actuation in ABB S800 I\/O hardware setups, the \u003cstrong\u003eABB DO821 3BSE013250R1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eDO821\u003c\/strong\u003e Digital Output Module, provides direct physical and electrical execution. The assembly interface converts internal fieldbus control logic into 32 discrete 24 VDC transistor outputs, enabling deterministic switching for field actuators without relay contact degradation.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eDO821 (3BSE013250R1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden \/ Switzerland\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.18 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e119 mm x 45 mm x 102 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e3 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumber of Channels\u003c\/td\u003e\n\u003ctd\u003e32 transistor outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Current\u003c\/td\u003e\n\u003ctd\u003e0.5 A per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModuleBus Current Draw\u003c\/td\u003e\n\u003ctd\u003e+5 VDC: ~100 mA; +24 VDC: ~50 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Insulation Voltage\u003c\/td\u003e\n\u003ctd\u003e50 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Test Voltage\u003c\/td\u003e\n\u003ctd\u003e500 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostics\u003c\/td\u003e\n\u003ctd\u003eFront panel LEDs: Fault (F), Run (R), OSP, Channel status\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20 (IEC 60529)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and System Integrity\u003c\/h3\u003e\n\u003cp\u003eThe DO821 interface operates over the ABB ModuleBus system, maintaining high-speed backplane bus communication velocity and cyclic channel refresh rates. Operating on a dual-supply structure, the internal micro-logic draws approximately 100 mA from the +5 VDC ModuleBus rail and 50 mA from the +24 VDC bus rail. Integrated galvanic channel-to-system isolation (rated for 500 VDC dielectric test voltage) limits transient noise propagation from field inductive loads into the backplane logic. Furthermore, internal supervisory circuits continuously validate output states, forcing the channels to safe predefined operational parameters upon detection of ModuleBus communication disruptions or system hardware errors.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What module termination units (MTU) support installation of the DO821?\u003c\/p\u003e\n\u003cp\u003eA: The DO821 connects directly to standard S800 MTUs, including the TU830 and TU832, which manage field wiring termination and backplane ModuleBus routing.\u003c\/p\u003e\n\u003cp\u003eQ: Can channels on the DO821 be hot-swapped while the system remains powered?\u003c\/p\u003e\n\u003cp\u003eA: Hot-swapping requires a compatible MTU with dual ModuleBus support, enabling replacement under power provided that local hazardous area safety procedures are maintained.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eEnsure complete power isolation of field signal lines and backplane power before inserting or removing the DO821 module into the MTU socket. Align the module housing vertically with the MTU guides, pushing firmly until the mechanical locking latch seats fully into place to maintain solid ModuleBus terminal contact.\u003c\/p\u003e\n\u003cp\u003eRoute all 24 VDC field output cables in separate wiring trunks away from high-voltage AC power lines to prevent inductive coupling. Ground the DIN rail mounting structure directly to the local earth busbar, ensuring earth bonding resistance remains below 1 Ohm for adequate EMC shielding.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52997741052216,"sku":"DO821 3BSE013250R1","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/631..jpg?v=1789883495","url":"https:\/\/www.automodulexpert.com\/products\/do821-3bse013250r1-abb-i-o-transistor-digital-output-module","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}