{"product_id":"tu844-3bse021445r1-abb-module-termination-unit-s800-i-o","title":"TU844 3BSE021445R1 ABB Module Termination Unit S800 I\/O","description":"\u003cp\u003eConfigured for field-level wiring termination in S800 I\/O distributed control network platforms, the \u003cstrong\u003eABB TU844\u003c\/strong\u003e (\u003cstrong\u003e3BSE021445R1\u003c\/strong\u003e Module Termination Unit) provides direct physical signal distribution and mechanical mounting support for I\/O modules.\u003c\/p\u003e\n\u003ch3\u003eNomenclature and Part Identification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBase Model: TU844\u003c\/li\u003e\n\u003cli\u003eOrdering Part Number: 3BSE021445R1\u003c\/li\u003e\n\u003cli\u003eFunction: Termination and Field Connectivity\u003c\/li\u003e\n\u003cli\u003eSeries: S800 I\/O\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical and Environmental 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\u003eTU844\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\u003eSubject to factory batch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.58 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e13.5 x 13 x 6.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive (no internal consumption)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Type\u003c\/td\u003e\n\u003ctd\u003e35 mm DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eI\/O Density Scaling and Backplane Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe TU844 functions as a passive interface carrier, facilitating the routing of field signals to the corresponding S800 I\/O module via the MTU-to-module connector. The design supports high-density I\/O configurations, ensuring low-resistance electrical pathways for critical process signals. By utilizing standardized S800 backplane architecture, this unit permits deterministic I\/O density scaling and physical signal isolation, maintaining system integrity across modular control nodes.\u003c\/p\u003e\n\u003ch3\u003eOrdering Info\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 unit: TU844 Module Termination Unit\u003c\/li\u003e\n\u003cli\u003e1 set: Integrated marking labels and mounting hardware\u003c\/li\u003e\n\u003cli\u003e1 unit: Technical installation sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMechanical Mounting and Wiring Procedures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation Guidelines:\n\u003cul\u003e\n\u003cli\u003eAlign the termination unit with the 35 mm DIN rail and press until the mechanical latch engages firmly.\u003c\/li\u003e\n\u003cli\u003eUse a flat-head screwdriver to release the locking mechanism for unit removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eCabling Standards:\n\u003cul\u003e\n\u003cli\u003eStrip field wires to the specified length to ensure full contact within the spring or screw-type terminals.\u003c\/li\u003e\n\u003cli\u003eTorque terminal screws to the recommended Nm rating to prevent loosening due to thermal expansion or vibration.\u003c\/li\u003e\n\u003cli\u003eEmploy cable management ducts to strain-relieve field conductors and ensure orderly routing to the unit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Is the TU844 electrically active?\u003c\/p\u003e\n\u003cp\u003eA: No, the TU844 is a passive termination unit; it provides the physical connection for field wiring to the I\/O module and contains no active electronic components.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Can this unit be used for redundant I\/O?\u003c\/p\u003e\n\u003cp\u003eA: Redundancy compatibility depends on the specific S800 I\/O module paired with this unit. Verify the compatibility matrix for the intended module type.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: What is the maximum wire gauge supported?\u003c\/p\u003e\n\u003cp\u003eA: The terminal blocks are designed to accommodate standard industrial signal wire sizes, typically up to 2.5 mm squared (approx. 14 AWG).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Does the unit provide surge protection?\u003c\/p\u003e\n\u003cp\u003eA: The TU844 acts as a bridge; surge protection must be provided by external devices or the associated I\/O modules if required by the application.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Is this unit compatible with all S800 I\/O modules?\u003c\/p\u003e\n\u003cp\u003eA: No, it is designed for specific I\/O module pin-out configurations. Check the compatibility table between the TU unit and the I\/O module.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: How is grounding handled?\u003c\/p\u003e\n\u003cp\u003eA: Shielded cables should be terminated to the common ground rail or the dedicated shield connection points provided on the termination unit.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Is the unit resistant to high-vibration environments?\u003c\/p\u003e\n\u003cp\u003eA: The unit is designed for standard industrial cabinet environments. In high-vibration scenarios, ensure the DIN rail is securely fastened to the backplate.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eQ: Can I replace the terminal blocks individually?\u003c\/p\u003e\n\u003cp\u003eA: The terminal interface is integrated into the TU844 design; the entire unit is replaced as a single hardware assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":46021159125165,"sku":"3BSE021445R1","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/TU8443BSE021445R1_1.jpg?v=1783414026","url":"https:\/\/www.maxwellplc.com\/ga\/products\/tu844-3bse021445r1-abb-module-termination-unit-s800-i-o","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}