{"product_id":"abb-tu891-s800-i-o-module-termination-bus-distribution","title":"ABB TU891 | S800 I\/O Module Termination \u0026 Bus Distribution","description":"\u003ch1\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe ABB TU891 Module Termination Unit (MTU) is a critical component in System 800xA S800 I\/O installations, providing reliable signal distribution and field device interfacing. It simplifies wiring between field instruments and I\/O modules, while mechanically keying modules to prevent incorrect installation. Moreover, the TU891 supports both standard and intrinsic safety (IS) configurations, ensuring flexible deployment in a wide range of industrial environments.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAttribute — Specification\u003c\/strong\u003e\u003cbr\u003eModel Number — TU891\u003cbr\u003eProduct ID — 3BSC840157R1\u003cbr\u003eType — Module Termination Unit (MTU)\u003cbr\u003eSystem Compatibility — ABB System 800xA S800 I\/O modules\u003cbr\u003eFunctions — Field signal termination, process voltage connection, ModuleBus distribution, address generation\u003cbr\u003eRated Voltage — Max 50 V\u003cbr\u003eRated Current — Max 2 A per channel\u003cbr\u003eTerminal Type — Gray terminals for field signals and process voltage\u003cbr\u003eBus Distribution — Distributes ModuleBus to I\/O module and next MTU\u003cbr\u003eAddressing — Generates correct address by shifting outgoing position signals\u003cbr\u003eMechanical Keying — Two mechanical keys for IS\/non‑IS module configuration\u003cbr\u003eMounting — DIN‑rail or rack installation\u003cbr\u003eProtection Class — Industrial grade\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What is the maximum voltage supported by the TU891?\u003c\/strong\u003e\u003cbr\u003eThe TU891 supports up to 50 V per channel, depending on connected I\/O modules.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Can the TU891 handle intrinsic safety (IS) modules?\u003c\/strong\u003e\u003cbr\u003eYes, it is available in both standard and IS configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: How is the TU891 mounted in a system?\u003c\/strong\u003e\u003cbr\u003eIt can be installed on DIN‑rails or within rack-mounted cabinets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: What functions does the MTU perform?\u003c\/strong\u003e\u003cbr\u003eIt provides field signal termination, ModuleBus distribution, and address generation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: Which industries typically use the TU891?\u003c\/strong\u003e\u003cbr\u003eProcess automation, power generation, oil \u0026amp; gas, chemical, and manufacturing industries.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":43853043171427,"sku":"TU891","price":676.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/371.1_478accf3-94d9-429c-9e1e-cd07bee454d4.jpg?v=1764037982","url":"https:\/\/www.autocontrolglobal.com\/fr\/products\/abb-tu891-s800-i-o-module-termination-bus-distribution","provider":"AutoControl Global","version":"1.0","type":"link"}