{"product_id":"abb-tu842-3bse020850r1-s800-i-o-redundant-termination-unit","title":"ABB TU842 3BSE020850R1 S800 I\/O Redundant Termination Unit","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB TU842 (3BSE020850R1)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-availability redundant Module Termination Unit (MTU) within the S800 I\/O family. It provides the essential physical and electrical interface for up to 16 channels, supporting critical modules like the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAI843, AO845, DI840, and DO880\u003c\/strong\u003e. This unit enables dual-module redundancy, ensuring continuous process operation even during a single module failure. We supply this component as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new original equipment\u003c\/strong\u003e, factory-sealed to maintain peak industrial performance.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp\u003eThe TU842 features a robust 56-point process connection array, engineered for high-current applications and redundant signal paths.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Data\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\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\u003eNumber of Channels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e16 (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 (I\/O Channel)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e3 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\u003e10 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\u003e56 (4 Power, 20 Power 0V, 32 Signal)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWire Size (Stranded)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.2 - 2.5 mm² (24 - 12 AWG)\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\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\u003eMax Operating Temp\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e55 °C (131 °F)\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\u003eMission-Critical Redundancy:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe TU842 supports two I\/O modules simultaneously. If one module fails, the secondary module takes over the load instantly, eliminating process downtime in power plants or chemical refineries.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Current Handling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike standard termination units, the TU842 manages up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e10 A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethrough process connections. This solves the challenge of powering power-hungry field actuators and sensors directly through the MTU.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStreamlined Wiring Architecture:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 56-point terminal block eliminates the need for external distribution strips. It integrates 20 dedicated 0V process power terminals, simplifying the grounding of complex 16-channel loops in crowded cabinets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOptimized Vibration Resistance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSecure screw-terminal blocks and horizontal DIN-rail mounting ensure signal stability. This mechanical design prevents wire fatigue and intermittent contact in high-vibration industrial environments.\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 I\/O modules are compatible with the TU842?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe TU842 specifically supports ABB S800 modules including AI843, AO845\/AO845A, DI840, DI880, DO840, DO880, and DP840. Using non-compatible modules may result in bus communication errors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit arrive with the I\/O modules included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The TU842 is the termination baseplate only. You must purchase the electronic I\/O modules separately. We guarantee this baseplate is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% brand new\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand ready for installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the torque requirements for field wiring?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTo ensure a gas-tight connection and prevent terminal damage, apply a torque of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e0.5 - 0.6 Nm\u003c\/strong\u003e. Strip wires to exactly\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e7 mm\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto maximize contact area within the terminal cage.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mount the TU842 vertically?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eABB recommends horizontal mounting for this specific model to ensure proper thermal management at the rated 55 °C ambient temperature. Vertical mounting may require derating of the maximum current capacity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53097937404088,"sku":"TU842 3BSE020850R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/TU8423BSE020850R11.jpg?v=1774488444","url":"https:\/\/www.globalpetroparts.com\/products\/abb-tu842-3bse020850r1-s800-i-o-redundant-termination-unit","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}