{"product_id":"abb-tu890-3bsc690075r1-s800-i-o-intrinsic-safety-compact-mtu","title":"ABB TU890 3BSC690075R1 S800 I\/O Intrinsic Safety Compact MTU","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB TU890 (3BSC690075R1)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as the dedicated mechanical and electrical interface for S800 Intrinsic Safety (IS) I\/O modules. This compact Module Termination Unit (MTU) facilitates the connection between field wiring in hazardous areas and the I\/O backplane. It features specialized blue terminals to signify Intrinsic Safety compliance and supports a wide array of IS analog and digital modules. We supply this component as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, ensuring your safety-critical loops maintain full dielectric integrity and regulatory compliance.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp\u003eThe TU890 provides a high-density termination platform for specialized IS applications:\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\u003eI\/O Configuration\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSingle I\/O (8 Channels)\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\u003e24 V\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eProcess Connections\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e27 Blue Terminals (IS Designated)\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\u003eCompatible I\/O Modules\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAI890, AI893, AI895, AO890, AO895, DI890, DO890\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\u003eProcess Wire 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\u003ePower Connector Wire Size\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.25 - 2.5 mm² (24 - 14 AWG)\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 ºC (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\u003eHazardous Area Compliance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe TU890 utilizes 27 distinct blue terminals to meet international standards for identifying Intrinsic Safety circuits. This visual and mechanical separation prevents accidental cross-wiring between IS and non-IS signals, protecting personnel and equipment in volatile environments.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-Density Signal Mapping:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDespite its compact footprint, the unit provides 27 connection points for just 8 channels. This generous terminal count allows for comprehensive wiring of transmitters, including signal, return, and shield\/grounding points, without requiring external junction blocks.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSimplified Maintenance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe MTU design allows for the replacement of I\/O modules without disturbing the field wiring. Technicians simply unplug the I\/O module from the TU890 base, significantly reducing MTTR (Mean Time to Repair) and preventing wiring errors during hardware swaps.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRobust Power Distribution:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe dedicated power supply connector handles wire sizes up to 14 AWG and supports a torque of 0.6 Nm. This ensures a stable, low-resistance power feed to the I\/O module, which is critical for maintaining the tight tolerances required for 4-20mA analog loops and RTD\/TC measurements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eVibration-Resistant Terminals:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe terminal block design maintains constant pressure on the conductor, preventing signal intermittent behavior in high-vibration industrial settings. The 500 V a.c. dielectric rating further shields the internal ModuleBus from field-side transients.\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\u003eWhy are the terminals on the TU890 blue?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe blue color follows global industrial standards (such as IEC 60079-14) to identify Intrinsically Safe wiring. This alerts technicians that the circuits connected to this MTU lead to hazardous areas and require specific handling and segregation from standard power-limited wiring.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the TU890 with standard (Non-IS) S800 modules?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. The TU890 is specifically keyed and designed for the Intrinsic Safety series, including modules like the AI890, AI895, and DI890. Using a standard module on an IS MTU violates safety certifications and risks compromising the energy-limiting properties of the circuit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum current the TU890 can handle?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe MTU supports up to 2 A per I\/O channel. This exceeds the requirements for standard 4-20mA loops, providing a significant safety margin and allowing the unit to power various field-mounted IS transmitters directly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the recommended mounting orientation for optimal cooling?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eABB specifies horizontal mounting for the TU890 to achieve its maximum rated temperature of 55 ºC (131 °F). Horizontal alignment facilitates natural convection across the attached I\/O module's internal components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53172627898552,"sku":"TU890 3BSC690075R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/TU8903BSC690075R1.jpg?v=1774841437","url":"https:\/\/www.globalpetroparts.com\/products\/abb-tu890-3bsc690075r1-s800-i-o-intrinsic-safety-compact-mtu","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}