{"product_id":"3bse008526r1-abb-tu811-s800-i-o-module-termination-unit","title":"3BSE008526R1 ABB TU811 S800 I\/O Module Termination Unit","description":"\u003ch2\u003eABB TU811 3BSE008526R1 Compact Module Termination Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB 3BSE008526R1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eTU811\u003c\/strong\u003e Module Termination Unit, operates as a dedicated hardware component for passive field signal termination and bus address generation within ABB S800 I\/O platforms.\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\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTU811 (3BSE008526R1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.188 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e64 mm x 64 mm x 170 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C (Horizontal), 0 to 40 deg C (Vertical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePassive (No active power draw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 isolated field channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250 VDC\/VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 A per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDielectric Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2000 VAC test voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWire Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolid: 0.2 to 4.0 mm2; Stranded: 0.2 to 2.5 mm2 (24 to 12 AWG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Class\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic ModuleBus Distribution \u0026amp; I\/O Scaling\u003c\/h3\u003e\n\u003cp\u003eThe baseplate architecture distributes backplane ModuleBus communication lines directly to mounted S800 digital modules, including DI820, DI821, DO820, and DO821 units. Internal position-shifting hardware generates exact slot addressing for subsequent termination bases across the local rack cluster. This deterministic bus routing preserves high-speed I\/O scan velocities while maintaining physical galvanic isolation between field terminal loops and internal controller logic.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does mechanical keying restrict incompatible I\/O module insertion?\u003c\/p\u003e\n\u003cp\u003eA: Two six-position mechanical keying switches provide 36 distinct physical coding combinations. Positioning these keys matches specific S800 module profiles, physically preventing personnel from seating incompatible I\/O modules onto high-voltage terminal bases.\u003c\/p\u003e\n\u003cp\u003eQ: What power bus load considerations apply to the passive backplane?\u003c\/p\u003e\n\u003cp\u003eA: The backplane operates as a passive routing medium with zero internal power consumption. However, field output lines support a maximum current limit of 3 A per channel, requiring external fusing when driving heavy inductive field loads.\u003c\/p\u003e\n\u003cp\u003eQ: What operational constraint determines the 40 deg C upper thermal limit?\u003c\/p\u003e\n\u003cp\u003eA: Operating the unit in a vertical DIN-rail orientation restricts natural thermal convection across attached modules. Consequently, engineers must limit maximum ambient enclosure temperatures to 40 deg C instead of the standard 55 deg C horizontal baseline.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the chassis directly onto a clean, grounded 35 mm DIN rail inside a protective NEMA or IP54-rated cabinet. Verify that the rear metallic latching clamp seats firmly against the rail surface to establish low-impedance ground paths for noise suppression.\u003c\/p\u003e\n\u003cp\u003eStrip all signal wires to exactly 7 mm. Insert single or stranded conductors ranging from 24 to 12 AWG into the screw terminal blocks, torquing terminal screws between 0.5 Nm and 0.6 Nm.\u003c\/p\u003e\n\u003cp\u003eConfigure the dual mechanical keying pegs to match the assigned I\/O module type prior to system energization. Maintain physical separation between 250 V field wiring and low-voltage communication cabling to prevent inductive noise coupling.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":52938690265400,"sku":"TU811 3BSE008526R1","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/549.jpg?v=1789105431","url":"https:\/\/www.automodulexpert.com\/products\/3bse008526r1-abb-tu811-s800-i-o-module-termination-unit","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}