{"product_id":"abb-tu843-3bse021443r1-s800-i-o-redundant-module-termination-unit","title":"ABB TU843 3BSE021443R1 S800 I\/O Redundant Module Termination Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eTU843\u003c\/strong\u003e is a specialized \u003cstrong\u003eModule Termination Unit (MTU)\u003c\/strong\u003e engineered for integration with \u003cstrong\u003eredundant I\/O\u003c\/strong\u003e modules within the \u003cstrong\u003eABB S800 I\/O\u003c\/strong\u003e ecosystem. It acts as the mechanical and electrical anchoring base for dual I\/O modules, establishing a robust interface that enables hot-swapping and seamless failover configurations in critical industrial processes. The base facilitates all field wiring connections and internal ModuleBus pass-through channels without breaking signal continuity during servicing.\u003c\/p\u003e\n\u003cp\u003eThis specific unit is configured for \u003cstrong\u003evertical DIN rail mounting\u003c\/strong\u003e, allowing control engineers to optimize cabinet layout and high-density tracking. Functioning safely within a low-voltage spectrum up to \u003cstrong\u003e50V\u003c\/strong\u003e, the unit manages discrete, analog, and communication loop distribution lines across automated control infrastructures managed by broader decentralized control networks.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt exclusively to house dual redundant S800 I\/O modules\u003c\/li\u003e\n\u003cli\u003eVertical DIN rail mounting topology for specific cabinet orientations\u003c\/li\u003e\n\u003cli\u003eSimplifies field signal routing via built-in terminal blocks\u003c\/li\u003e\n\u003cli\u003eSupports hot-swapping of inactive or faulted modules under power\u003c\/li\u003e\n\u003cli\u003eVerified operational threshold up to 50V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDistributed Control Systems (DCS) deployments featuring ABB System 800xA\u003c\/li\u003e\n\u003cli\u003eCompact Product Suite automation setups requiring space-saving form factors\u003c\/li\u003e\n\u003cli\u003eHigh-availability process loops in petrochemical, marine, and power facilities\u003c\/li\u003e\n\u003cli\u003eMission-critical safety or auxiliary monitoring stations requiring redundant failover paths\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical 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\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\/Type Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTU843\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct ID\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3BSE021443R1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eModule_Termination_Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50V maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Redundancy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Orientation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVertical DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Net Depth \/ Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e64 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Net Height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e124 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Net Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e186.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Net Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.66 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoHS Information\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFollowing EU Directive 2011\/65\/EU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWEEE Category\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5. Small Equipment (No External Dimension More Than 50 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNumber of Batteries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSCIP Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7c710169-c950-4bd8-ae0c-d8dba80a0de2 Bulgaria\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN Rail Mounting\u003c\/strong\u003e: Snap the assembly firmly onto a standard 35mm vertical DIN rail. Ensure the rail is bonded to the main enclosure earth ground system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Orientation\u003c\/strong\u003e: Verify the mounting orientation matches the vertical layout requirement to satisfy default convective airflow pathways around operational modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Practice\u003c\/strong\u003e: Terminate field cables utilizing proper wire ferrule dimensions, taking care to segregate low-voltage instrument loops from adjacent higher-voltage power distribution runs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Handling\u003c\/strong\u003e: When inserting or extracting an I\/O module from either slot, use even pressure to avoid skewing the multipin backplane connection pins.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the core difference between the TU842 and the TU843 termination units?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe primary difference is the physical mounting layout. The TU842 is configured for horizontal DIN rail mounting, whereas this unit is structurally designed for vertical DIN rail installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this MTU require an isolated external grounding strap?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe device grounds through its DIN rail attachment, though following standard cabinet grounding practices by maintaining a low-impedance connection to the main backplate is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I run standard 120V AC control loops directly through this termination block?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, this termination unit has a maximum rated technical voltage of 50V. Exceeding this limit compromises the safety and operational constraints of the device.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre there internal batteries that require scheduling for maintenance replacement?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, this passive termination unit contains zero batteries and relies entirely on external system bus architectures for operational logic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat versions of the ABB 800xA control platform are compatible with this unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is cataloged for compatibility with S800 I\/O versions 4.0, 4.1, 5.0, 5.1, and System 800xA 6.0 setups.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52668610511211,"sku":"3BSE021443R1","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/abb-tu843-3bse021443r1-compact-product-suite-hardware-selector-yrnn1ujdza1_0bca439e-cd83-4bf3-99f3-a0742d437c85.jpg?v=1765535473","url":"https:\/\/www.plcprotech.com\/products\/abb-tu843-3bse021443r1-s800-i-o-redundant-module-termination-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}