{"product_id":"compact-i-o-left-end-cap-bus-terminator-allen-bradley-1769-ecl","title":"Compact I\/O Left End Cap \/ Bus Terminator Allen-Bradley 1769-ECL","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe 1769-ECL is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epassive left end cap\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eused to terminate the communication bus on the left side of an Allen-Bradley 1769 Compact I\/O bank. While often overlooked, it is essential for maintaining\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esignal integrity\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eacross the backplane, preventing reflections that could cause intermittent communication faults or system instability.\u003c\/p\u003e\n\u003cp\u003eEvery 1769 I\/O assembly requires both a right end cap (1769-ECR) and a left end cap (1769-ECL) for proper operation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1769-ECL \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePassive Bus Terminator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e118 x 87 x 15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.06 kg \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eInstallation and Safety\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePositioning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMust be installed on the leftmost end of a 1769 I\/O bank.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBus Connectivity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eEnsure the bus lever is fully locked for a secure connection to the 5V DC backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSystem Integrity:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOperating without a properly installed left end cap can cause I\/O bus faults or erratic module behavior.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThermal Consideration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eGenerates minimal heat but must remain within 0–60 °C to maintain stability of termination resistors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eCommon Technical Questions\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need the 1769-ECL with a CompactLogix 5370 L1 or L2 controller?\u003c\/strong\u003e\u003cbr\u003eStandard L1 and L2 controllers are packaged units with integrated left-side bus connections. For L3 series controllers or modular expansion banks (e.g., 1769-AENTR), the 1769-ECL is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emandatory\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eon the leftmost expansion module or power supply.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a 1769-ECR (Right End Cap) on the left side?\u003c\/strong\u003e\u003cbr\u003eNo. The 1769-ECR and 1769-ECL are\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003enot interchangeable\u003c\/strong\u003e. They have mirrored connectors and different internal termination circuits designed for their respective ends.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":52513494401208,"sku":"1769-ECL","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1769-ECL.jpg?v=1769756635","url":"https:\/\/www.globalpetroparts.com\/products\/compact-i-o-left-end-cap-bus-terminator-allen-bradley-1769-ecl","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}