{"product_id":"tu840-3bse020846r1-abb-redundant-module-termination-unit-mtu","title":"TU840 3BSE020846R1 | ABB Redundant Module Termination Unit (MTU)","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe ABB TU840 (Part Number: 3BSE020846R1) is a Redundant Module Termination Unit (MTU) designed for the S800 I\/O process automation system. It acts as a passive, high-reliability baseplate engineered to host dual, redundant Optical ModuleBus Modems (TB840 or TB840A), splitting power and managing communication routing downstream to redundant I\/O clusters without active electronic points of failure.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct Type: Module Termination Unit (MTU) for Redundant Configuration\u003c\/li\u003e\n\u003cli\u003eModel Code: TU840\u003c\/li\u003e\n\u003cli\u003ePart Number: 3BSE020846R1\u003c\/li\u003e\n\u003cli\u003eManufacturer: ABB\u003c\/li\u003e\n\u003cli\u003eSystem Compatibility: S000 I\/O Family (Connects redundant TB840\/TB840A Modems to Redundant I\/O)\u003c\/li\u003e\n\u003cli\u003eCommunication Protocol Support: ABB's ModuleBus\u003c\/li\u003e\n\u003cli\u003eRedundancy Support: Yes (Module Redundancy and Line Redundancy capability)\u003c\/li\u003e\n\u003cli\u003ePower Configuration Type: Redundant Modems \/ Redundant I\/O via Single Power Input\u003c\/li\u003e\n\u003cli\u003eNominal Supply Voltage: 24 V DC (Acceptable range: 19.2 to 30.0 V DC)\u003c\/li\u003e\n\u003cli\u003eMaximum ModuleBus Power Current: 5 V @ 1.5 A, 24 V @ 1.5 A distribution\u003c\/li\u003e\n\u003cli\u003ePower Dissipation: 2.0 W maximum\u003c\/li\u003e\n\u003cli\u003eRated Insulation \/ Dielectric Test Voltage: 50 V \/ 500 V AC\u003c\/li\u003e\n\u003cli\u003eAcceptable Wire Sizes: Solid\/Stranded 0.2 to 2.5 mm² (24 to 12 AWG)\u003c\/li\u003e\n\u003cli\u003eRecommended Terminal Screw Torque: 0.5 Nm\u003c\/li\u003e\n\u003cli\u003eIngress Protection Rating: IP20 (IEC 60529 Compliant)\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: Sweden\u003c\/li\u003e\n\u003cli\u003ePhysical Dimensions: 18.6 cm x 12.4 cm x 4.7 cm (Height includes locking latch)\u003c\/li\u003e\n\u003cli\u003eProduct Net Weight: 0.45 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the TU840 MTU onto a standard cabinet DIN rail, prioritizing a flat orientation to optimize thermal dissipation.\u003c\/li\u003e\n\u003cli\u003eAdjust the integrated mechanical keys using a flat screwdriver to match the specific profile of the TB840\/TB840A modems prior to module insertion.\u003c\/li\u003e\n\u003cli\u003eSet the localized rotary cluster address switch to the specific node designation assigned in the system configuration software.\u003c\/li\u003e\n\u003cli\u003eTerminate field power and communication lines to the compression screw blocks, maintaining the recommended 0.5 Nm torque threshold to prevent loose connections.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53620757364920,"sku":"TU840","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/TU840_2.png?v=1782208094","url":"https:\/\/www.globalpetroparts.com\/products\/tu840-3bse020846r1-abb-redundant-module-termination-unit-mtu","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}