{"product_id":"allen-bradley-1769-ecl-compactlogix-left-terminator","title":"Allen-Bradley 1769-ECL | CompactLogix Left Terminator","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe Allen-Bradley \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e serves as the mandatory termination point for the left side of any CompactLogix or MicroLogix 1500 controller system. This specialized hardware module completes the internal communication bus, ensuring signal integrity across all connected I\/O modules. Without the \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e, the backplane circuit remains open, leading to critical system faults and data loss. Engineered for industrial reliability, it protects internal bus connectors while providing a secure mechanical finish for the PLC rack.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Configuration \u0026amp; Hardware Architecture\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e utilizes a passive yet essential hardware architecture. It functions as the physical and electrical \"bookend\" of the modular assembly, specifically designed for impedance matching within the 1769 platform.\u003c\/p\u003e\n\n\u003ch3\u003ePassive Bus Termination\u003c\/h3\u003e\n\u003cp\u003eThe internal circuitry features precision resistors that prevent signal reflection on the high-speed data bus. This ensures that the controller maintains stable communication with every expansion module in the local rack.\u003c\/p\u003e\n\n\u003ch3\u003eInterlocking Mechanical Design\u003c\/h3\u003e\n\u003cp\u003eThe module incorporates a rugged tongue-and-groove interface. This design allows the \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e to slide and lock firmly into the adjacent controller or I\/O module, creating a unified, vibration-resistant assembly suitable for heavy-duty applications.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" style=\"width: 100%; border-collapse: collapse;\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth style=\"padding: 8px; background-color: #f2f2f2; text-align: left;\"\u003eFeature\u003c\/th\u003e\n      \u003cth style=\"padding: 8px; background-color: #f2f2f2; text-align: left;\"\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eModel Number\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003e\u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eModule Type\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eLeft End Cap \/ Terminator\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eCompatibility\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eCompactLogix 1769, MicroLogix 1500\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eBus Current Draw\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003e5 mA @ 5.1V DC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eOperating Temperature\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003e0°C to 60°C (32°F to 140°F)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eOperating Shock\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003e20g (DIN Rail), 30g (Panel Mount)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px;\"\u003eDimensions (HxWxD)\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px;\"\u003e118 x 15 x 87 mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eInstallation \u0026amp; Engineering Guide\u003c\/h2\u003e\n\u003cp\u003eEngineers must install the \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e to prevent \"Bus Expansion\" errors in the controller's diagnostic log. Proper installation ensures consistent system uptime.\u003c\/p\u003e\n\n\u003ch3\u003ePhysical Integration\u003c\/h3\u003e\n\u003cp\u003eAlign the bus connectors of the \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e with the leftmost module in your stack. Press the module firmly until the locking latches engage. Ensure the DIN rail is properly grounded to mitigate electromagnetic interference (EMI).\u003c\/p\u003e\n\n\u003ch3\u003eSystem Verification\u003c\/h3\u003e\n\u003cp\u003eOnce installed, verify that the \"I\/O\" status LED on the controller is solid green. If a fault persists, inspect the end cap for physical damage or improper seating on the bus pins.\u003c\/p\u003e\n\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Signal Integrity:\u003c\/strong\u003e Eliminates signal noise and data corruption on the backplane.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged Durability:\u003c\/strong\u003e Withstands high-vibration environments, making it ideal for mobile machinery.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlatform Versatility:\u003c\/strong\u003e Supports both high-end CompactLogix and legacy MicroLogix 1500 controllers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical FAQs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Is the \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e interchangeable with the 1769-ECR?\u003c\/strong\u003e\u003cbr\u003e\nA1: No. The \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e is for the left side only. The 1769-ECR is the right-side terminator and is not physically compatible with the left-hand slot.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Does this module require software configuration?\u003c\/strong\u003e\u003cbr\u003e\nA2: No. It is a passive hardware component. It does not appear in the I\/O tree of Studio 5000, but its physical presence is mandatory for the bus to function.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What happens if the \u003cstrong style=\"color: #003366;\"\u003e1769-ECL\u003c\/strong\u003e is missing?\u003c\/strong\u003e\u003cbr\u003e\nA3: The PLC will enter a major fault state, and all local I\/O communication will cease because the data bus remains an open circuit.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51050303946884,"sku":"1769-ECL","price":167.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/7454\/7844\/files\/1769-ECL-1.jpg?v=1776584697","url":"https:\/\/www.etowonauto.com\/az\/products\/allen-bradley-1769-ecl-compactlogix-left-terminator","provider":"Etowon Auto","version":"1.0","type":"link"}