{"product_id":"tu844-3bse021445r1-abb-s800-i-o-redundant-termination-unit","title":"TU844 3BSE021445R1 | ABB | S800 I\/O Redundant Termination Unit","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB TU844 (3BSE021445R1)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as a high-integrity Redundant Module Termination Unit (MTU) within the S800 I\/O ecosystem. It provides the essential physical and electrical interface for up to 8 channels, specifically accommodating\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAI845, AI880, AI880A, and DP840\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emodules. This unit enables seamless dual-module redundancy, ensuring continuous process data acquisition even if a single I\/O module requires replacement or experiences a fault. We supply this component as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new original equipment\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto maintain the highest safety and performance standards of your Advant or 800xA control system.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp\u003eThe TU844 utilizes a specialized 40-point terminal block layout designed for secure process power distribution and signal integrity.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eArticle Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3BSE021445R1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eRedundant I\/O Baseplate\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 (2 terminals per channel)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50 V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax Current per Channel\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMax Current Process Connection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 A\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eTotal Process Connections\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e40 (4 Power, 20 Power 0V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting Orientation\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHorizontal\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eDielectric Test Voltage\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e500 V a.c.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWire Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.2 - 4 mm² (Solid), 24 - 12 AWG (Stranded)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eFault-Tolerant Architecture:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe TU844 hosts two redundant I\/O modules simultaneously. This configuration eliminates single points of failure at the I\/O layer, keeping your critical loops active during hardware maintenance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStreamlined Power Distribution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWith 20 dedicated 0 V process power terminals and 4 dedicated process power points, this unit removes the need for external distribution blocks. This integrated design reduces cabinet clutter and minimizes potential wiring errors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision Signal Termination:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe unit accepts a wide range of wire sizes (up to 12 AWG stranded). The robust screw-clamp terminals ensure a gas-tight connection, preventing signal drift in high-vibration or corrosive industrial environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Management Optimization:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe horizontal mounting profile facilitates natural convective cooling across the connected modules. This design maintains stable operation at ambient temperatures up to 55 °C (131 °F) without requiring external fans.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhich specific I\/O modules can I use with the TU844?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TU844 specifically supports AI845, AI880, AI880A, and DP840. Always verify your module's firmware compatibility with the 800xA system version before installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the correct installation torque for the terminal screws?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eApply a torque between 0.5 and 0.6 Nm. Over-tightening can damage the terminal cage, while under-tightening leads to high contact resistance and intermittent signal loss.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit support \"Hot Swapping\"?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The Redundant MTU design allows you to remove and replace one of the two redundant I\/O modules while the process remains energized and the secondary module continues to operate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine ABB part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe guarantee this is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New, original ABB 3BSE021445R1\u003c\/strong\u003e. It ships in factory-sealed packaging to ensure authenticity and longevity for your industrial control network.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53097947332792,"sku":"TU844 3BSE02445R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/TU8443BSE02445R1.jpg?v=1774488682","url":"https:\/\/www.globalpetroparts.com\/products\/tu844-3bse021445r1-abb-s800-i-o-redundant-termination-unit","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}