{"product_id":"allen-bradley-1769-ecl-compactlogix-left-end-cap","title":"Allen-Bradley 1769-ECL CompactLogix Left End Cap","description":"\u003cp\u003eConfigured for communication bus termination in CompactLogix and MicroLogix 1500 systems, the \u003cstrong\u003eAllen-Bradley 1769-ECL\u003c\/strong\u003e (\u003cstrong\u003e1769-ECL\u003c\/strong\u003e End Cap) provides direct physical\/electrical execution. It terminates the left end of the 1769 Compact I\/O parallel backplane bus, preventing signal reflections and maintaining impedance stability across connected modules. The component mounts directly adjacent to the left-most module without requiring additional external power supplies or network configuration.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eModel Suffix\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eOrientation \/ Application\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSeries Compatibility\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1769-ECL\u003c\/td\u003e\n\u003ctd\u003eLeft-End Cap Terminator\u003c\/td\u003e\n\u003ctd\u003eSeries A and B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1769-ECR\u003c\/td\u003e\n\u003ctd\u003eRight-End Cap Terminator\u003c\/td\u003e\n\u003ctd\u003eSeries A and B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1769-ECL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.11 lbs (0.05 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1769 Single-Slot Profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (32 to 140 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive Termination Circuitry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Type\u003c\/td\u003e\n\u003ctd\u003eOpen Style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley CompactLogix \/ MicroLogix 1500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTermination Position\u003c\/td\u003e\n\u003ctd\u003eLeft-Most Slot Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus \u0026amp; Deterministic Communications\u003c\/h3\u003e\n\u003cp\u003eThe 1769-ECL maintains backplane bus communication velocity across CompactLogix I\/O structures by providing differential line termination. By suppressing high-frequency noise injection and packet reflection on the parallel bus lines, it preserves deterministic scan timing and firmware flash compatibility across all backplane-connected modules.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What error occurs if the 1769-ECL left end cap is missing from a CompactLogix bank?\u003c\/p\u003e\n\u003cp\u003eA: The controller will register a backplane bus fault due to an unterminated signal loop, blocking I\/O image table updates and halting execution.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1769-ECL be used on the right side of a 1769 Compact I\/O bank?\u003c\/p\u003e\n\u003cp\u003eA: No, the 1769-ECL is physically keyed exclusively for left-side termination. Right-side termination requires the 1769-ECR model.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Isolation:\u003c\/strong\u003e Turn off system backplane power prior to attaching or removing the end cap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlignment \u0026amp; Insertion:\u003c\/strong\u003e Align the guide rails on the right face of the 1769-ECL with the corresponding slots on the left-most 1769 module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Lever Engagement:\u003c\/strong\u003e Slide the end cap flush against the adjacent module and push the bus lever into the locked position to establish backplane termination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Ensure the end cap is securely snapped onto the 35 mm DIN rail or fastened via panel-mounting screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESD Precautions:\u003c\/strong\u003e Handle the module using standard electrostatic discharge protection practices to safeguard internal passive termination networks.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52734366646552,"sku":"1769-ECL","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1769-ECL2_Cocoai.jpg?v=1789870733","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1769-ecl-compactlogix-left-end-cap","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}