{"product_id":"abb-tu842-3bse020850r1-s800-i-o-redundant-module-termination-unit","title":"ABB TU842 3BSE020850R1 S800 I\/O Redundant Module Termination Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eTU842\u003c\/strong\u003e is a \u003cstrong\u003eModule Termination Unit\u003c\/strong\u003e (MTU) designed for the \u003cstrong\u003eS800 I\/O\u003c\/strong\u003e system to support \u003cstrong\u003eredundant I\/O\u003c\/strong\u003e configurations. It serves as the physical and electrical interface base, enabling two compatible S800 I\/O modules to work in pairs for high-availability process automation applications. Engineered with a maximum voltage rating of \u003cstrong\u003e50V\u003c\/strong\u003e, this unit routes signal and power lines safely while facilitating \u003cstrong\u003ehorizontal DIN rail mounting\u003c\/strong\u003e inside electrical control cabinets.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt for redundant I\/O module pairing to eliminate single points of failure.\u003c\/li\u003e\n\u003cli\u003eRated for signal and power distribution up to 50V maximum.\u003c\/li\u003e\n\u003cli\u003eFormed for horizontal mounting orientation on standard industrial DIN rails.\u003c\/li\u003e\n\u003cli\u003eStreamlines field wiring termination to improve system maintainability.\u003c\/li\u003e\n\u003cli\u003eIntegrated keying mechanisms prevent the accidental insertion of mismatched I\/O modules.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDistributed Control Systems (DCS) requiring high-availability configurations.\u003c\/li\u003e\n\u003cli\u003eCritical process loops in chemical plants, oil refineries, and water treatment utilities.\u003c\/li\u003e\n\u003cli\u003ePower generation plant safety and auxiliary control setups.\u003c\/li\u003e\n\u003cli\u003eFactory automation control systems utilizing the S800 I\/O architecture.\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\u003eValue\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 Designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTU842\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct ID\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3BSE020850R1\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\u003eSystem Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eS800 I\/O System (System 800xA 4.0\/4.1\/5.0\/5.1\/6.0, Compact Product Suite)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eI\/O Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRedundant I\/O support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50V maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Orientation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHorizontal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHS Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e853710\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCustoms Tariff Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e85371098\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\u003e124 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\u003e186.5 mm\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 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\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\u003eRoHS Compliance\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003ch3\u003eDIN Rail Mounting\u003c\/h3\u003e\n\u003cp\u003eMount the unit horizontally on a top-hat standard 35 mm DIN rail. Ensure the rail is grounded properly to the backplate of the enclosure to manage electromagnetic interference. Snap the locking clips securely onto the rail to avoid movement under vibration.\u003c\/p\u003e\n\u003ch3\u003eWiring and Signal Insulation\u003c\/h3\u003e\n\u003cp\u003eVerify that all field wiring routed to the terminal connections does not exceed the maximum specification of 50V. Maintain proper separation between low-voltage signal cables and high-power electrical runs within the cable ducting.\u003c\/p\u003e\n\u003ch3\u003eRedundant Module Matching\u003c\/h3\u003e\n\u003cp\u003eWhen seating modules into the dual slots of the base unit, ensure that both components are of identical model numbers and firmware revisions to maintain proper synchronization and failover functions.\u003c\/p\u003e\n\u003ch3\u003eHeat Dissipation\u003c\/h3\u003e\n\u003cp\u003eKeep appropriate open space above and below the horizontally installed base unit. Proper spacing prevents stagnant hot air pockets and guarantees sufficient natural convection across the module housings.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the core purpose of the TU842 base unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt provides the shared electrical connection points and mechanical mounting slots required to operate two S800 I\/O modules in a redundant configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum operational voltage supported by this termination unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit is specified for a maximum operating voltage of 50V.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this unit be mounted vertically on the DIN rail?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, this module termination unit is explicitly designed for horizontal DIN rail mounting.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this product incorporate any batteries?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, the unit contains zero batteries and depends entirely on external system power distribution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich ABB control architectures support this device?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is fully compatible with ABB System 800xA versions 4.0 through 6.0 and the Compact Product Suite running S800 I\/O modules.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52668610871659,"sku":"3BSE020850R1","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/abb-tu842-3bse020850r1-redundant-module-termination-unit-5vorksgfbzz_39676cee-c90a-47a9-b5a3-6ee7289098f7.jpg?v=1765535487","url":"https:\/\/www.plcprotech.com\/products\/abb-tu842-3bse020850r1-s800-i-o-redundant-module-termination-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}