{"product_id":"abb-tu890-3bsc690075r1-s800-i-o-module-termination-unit","title":"ABB TU890 3BSC690075R1 S800 I\/O Module Termination Unit","description":"\u003cp\u003eThe \u003cstrong\u003eABB TU890\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e3BSC690075R1\u003c\/strong\u003e Module Termination Unit, operates as a dedicated hardware component for field signal termination and ModuleBus distribution within S800 I\/O systems.\u003c\/p\u003e\n\u003ch3\u003eHardware 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\u003eModel\u003c\/td\u003e\n\u003ctd\u003eTU890 (3BSC690075R1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eStandard Manufacturer Sourcing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard S800 I\/O Compact MTU Footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive Unit (Determined by Connected Module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eS800 I\/O System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupported Modules\u003c\/td\u003e\n\u003ctd\u003eAI890, AI893, AI895, AO890, AO895, DI890, DO890\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Capacity\u003c\/td\u003e\n\u003ctd\u003e8 Channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Rating\u003c\/td\u003e\n\u003ctd\u003eUp to 50 V (limited by I\/O module design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent per Channel\u003c\/td\u003e\n\u003ctd\u003eMax 2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcess Wire Size\u003c\/td\u003e\n\u003ctd\u003eSolid: 0.2 to 4 mm2, Stranded: 0.2 to 2.5 mm2 (24 to 12 AWG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Wire Size\u003c\/td\u003e\n\u003ctd\u003e0.25 to 2.5 mm2 (24 to 14 AWG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScrew Terminal Torque\u003c\/td\u003e\n\u003ctd\u003e0.5 to 0.6 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Voltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003eStandard Industrial Limits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003eNon-condensing Industrial Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eHorizontal on DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIngress Protection\u003c\/td\u003e\n\u003ctd\u003eStandard Chassis IP Rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eIntrinsic Safety Compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane ModuleBus and Deterministic Signal Distribution\u003c\/h3\u003e\n\u003cp\u003eThe passive backplane structure on the unit manages backplane bus communication velocity and address allocation across connected S800 intrinsically safe modules. Position signals embedded in the MTU interface propagate hardware auto-addressing directly into the ModuleBus structure without requiring software assignment. The backplane design ensures isolation between power distribution pathways and deterministic signal transmission lines, maintaining noise immunity for high-density intrinsically safe field wiring terminations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the unit support hot swapping of connected S800 I\/O modules?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The passive MTU interface allows live removal and insertion of compatible intrinsically safe I\/O modules without interrupting ModuleBus communication to adjacent units on the rail.\u003c\/p\u003e\n\u003cp\u003eQ: How is incorrect module insertion prevented during field replacement?\u003c\/p\u003e\n\u003cp\u003eA: Mechanical keying features on the unit interface match specific I\/O module key positions, physically blocking the installation of incompatible or non-intrinsically safe module types.\u003c\/p\u003e\n\u003cp\u003eQ: What is the maximum allowed conductor size for process signal wiring?\u003c\/p\u003e\n\u003cp\u003eA: The process connections accept solid wire up to 4 mm2 or stranded wire up to 2.5 mm2 (24 to 12 AWG).\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the unit horizontally on a standard 35 mm DIN rail using the integrated spring-loaded latching mechanism. Ensure the rail is grounded to panel chassis earth.\u003c\/li\u003e\n\u003cli\u003eVerify mechanical keying positions match the designated I\/O module type prior to mounting the active electronics onto the MTU base.\u003c\/li\u003e\n\u003cli\u003eStrip process and power supply wiring according to manufacturer terminal guidelines. Fasten process terminal screws to a torque specification of 0.5 to 0.6 Nm.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between intrinsically safe field wiring, power lines, and non-intrinsically safe cabling in compliance with EN\/IEC 60079-14 installation standards.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45350576816243,"sku":"TU890 3BSC690075R1","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-08-12_18-12-19_ea091890-b4fc-4500-b44b-4a966f8238bd.png?v=1786529690","url":"https:\/\/www.dcssupplier.com\/products\/abb-tu890-3bsc690075r1-s800-i-o-module-termination-unit","provider":"DcsSupplier Limited","version":"1.0","type":"link"}