{"product_id":"allen-bradley-1786-xt-controlnet-75-ohm-bnc-network-terminator","title":"Allen Bradley 1786-XT ControlNet 75-Ohm BNC Network Terminator","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1786-XT\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a critical component for maintaining the integrity of a ControlNet coaxial network. This 75-Ohm BNC terminator absorbs electrical signals at the physical ends of the trunk cable, preventing signal reflection that causes data corruption. We supply this unit in\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal condition to ensure your high-speed deterministic network operates without communication faults or packet loss.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe 1786-XT matches the characteristic impedance of standard ControlNet RG-6 coaxial cables to provide a clean electrical termination.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eAllen Bradley\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1786-XT\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eComponent Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eNetwork Terminator\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eConnector Style\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eBNC\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eImpedance\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e75 Ohms\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eControlNet Coax Media Trunk Ends\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIP20\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100% Brand New Original\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEliminates Signal Reflection:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe 1786-XT absorbs the wave energy at the end of the cable run. This prevents the signal from bouncing back down the line, which otherwise creates standing waves and disrupts communication for all nodes on the segment.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMaintains 75-Ohm Impedance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis terminator precisely matches the 75-ohm requirement of the ControlNet specification. Using an incorrect resistance (such as standard 50-ohm video terminators) introduces impedance mismatches that degrade network performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandardized BNC Interface:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe twist-lock BNC connector ensures a secure physical connection to the ControlNet tap. The mechanical locking mechanism resists loosening caused by cabinet vibrations or thermal expansion.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eEssential for High-Speed Logic:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAt 5 Mbps, ControlNet timing remains ultra-sensitive. The 1786-XT ensures the physical layer remains stable, allowing the processor to maintain precise Network Update Times (NUT) without retries.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhere exactly do I install the 1786-XT?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou must install a 1786-XT terminator on the open BNC port of the taps located at the two extreme ends of the ControlNet trunk cable. A standard network segment requires exactly two terminators—one at each end.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a standard 50-ohm BNC terminator instead?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. ControlNet requires 75-ohm termination. Using a 50-ohm terminator creates an impedance mismatch that generates significant network errors and may prevent nodes from joining the network entirely.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I verify if the terminator is functioning correctly?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith the network powered down and the terminator removed from the tap, use a digital multimeter to measure the resistance between the center pin and the outer shell. It should read approximately 75 ohms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine Allen Bradley part?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. We provide only\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal Allen Bradley 1786-XT terminators. Genuine terminators use high-tolerance internal resistors designed to withstand industrial temperature cycles without drifting from the 75-ohm specification.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53361205870776,"sku":"1786-XT","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1786-XT.jpg?v=1776330094","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1786-xt-controlnet-75-ohm-bnc-network-terminator","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}