{"product_id":"abb-tu891-module-termination-unit","title":"ABB TU891 Module Termination Unit","description":"\u003ch2\u003eABB TU891 Module Termination Unit\u003c\/h2\u003e\n\u003cp\u003eConfigured for field signal and process power connections, the \u003cstrong\u003eABB TU891 3BSC840157R1\u003c\/strong\u003e (\u003cstrong\u003eTU891\u003c\/strong\u003e Module Termination Unit) provides the terminal interface between field wiring and the associated I\/O hardware. It provides 8 channels, 27 gray process terminals, and a nominal 24 V connection arrangement.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eTU891\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull Model\u003c\/td\u003e\n\u003ctd\u003eTU891 3BSC840157R1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpare Model\u003c\/td\u003e\n\u003ctd\u003e3BSC840157R1\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eModule Termination Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eCompact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannels\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003eTerminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcess Connections\u003c\/td\u003e\n\u003ctd\u003e27 gray terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current per I\/O Channel\u003c\/td\u003e\n\u003ctd\u003e2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Test Voltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eHorizontal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eEstimated shipping size: 7.6 x 7.6 x 20.3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTariff Code\u003c\/td\u003e\n\u003ctd\u003e8537101190\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eABB Industrial I\/O Interface Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe TU891 provides a compact terminal interface for 8 field channels. Its 27 gray terminals accommodate field signal and process power connections, while the terminal-block construction provides direct physical access for field wiring.\u003c\/p\u003e\n\u003cp\u003eThe specified 2 A maximum current per I\/O channel defines the stated channel current limit. In addition, the 500 V AC dielectric test voltage specifies the electrical withstand test level provided in the supplied data.\u003c\/p\u003e\n\u003cp\u003eThe horizontal mounting orientation determines the physical installation position. Therefore, installers should maintain adequate clearance around the terminal area for conductor routing and terminal access.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How many I\/O channels does the TU891 provide?\u003c\/p\u003e\n\u003cp\u003eA: The TU891 provides 8 channels.\u003c\/p\u003e\n\u003cp\u003eQ: What is the maximum specified current per I\/O channel?\u003c\/p\u003e\n\u003cp\u003eA: The specified maximum current is 2 A per I\/O channel.\u003c\/p\u003e\n\u003cp\u003eQ: What terminal arrangement does the TU891 use?\u003c\/p\u003e\n\u003cp\u003eA: The supplied data specifies a terminal-block connection with 27 gray process terminals.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eMount the TU891 in the specified horizontal orientation and secure it according to the applicable cabinet or mounting-system requirements.\u003c\/li\u003e\n\u003cli\u003eRoute field conductors so that terminal access remains unobstructed during inspection and maintenance.\u003c\/li\u003e\n\u003cli\u003eSeparate signal wiring from high-current or high-noise conductors where the installation environment requires electromagnetic interference control.\u003c\/li\u003e\n\u003cli\u003eTerminate cable shields according to the grounding architecture specified for the installed control system. Do not assume a shield termination method that is not defined by the system documentation.\u003c\/li\u003e\n\u003cli\u003eVerify conductor polarity, terminal assignment, and channel allocation against the applicable wiring diagram before energization.\u003c\/li\u003e\n\u003cli\u003eKeep the specified 2 A maximum current per I\/O channel within the connected circuit design.\u003c\/li\u003e\n\u003cli\u003eInspect terminal tightness and conductor seating before commissioning.\u003c\/li\u003e\n\u003cli\u003eVerify electrical isolation requirements using the applicable system-level installation documentation; the supplied TU891 data specifies a 500 V AC dielectric test voltage but does not define a field insulation-testing procedure.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44595716816984,"sku":"TU891 3BSC840157R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/TU891-3BSC840157R1-3_1200x1200_bbc199d0-0352-4e15-8b03-1cee8cb148c5.jpg?v=1786703867","url":"https:\/\/www.industriaxplc.com\/products\/abb-tu891-module-termination-unit","provider":"IndustriaX Limited","version":"1.0","type":"link"}