{"product_id":"compact-i-o-right-to-left-bus-expansion-cable-allen-bradley-1769-crl1","title":"Compact I\/O Right-to-Left Bus Expansion Cable Allen-Bradley 1769-CRL1","description":"\u003ch2\u003eAllen-Bradley 1769-CRL1 Compact I\/O Bus Expansion Cable\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1769-CRL1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1769-CRL1\u003c\/strong\u003e Expansion Cable, operates as a dedicated hardware component for extending backplane logic communication across separate module banks within CompactLogix and MicroLogix 1500 systems. The device routes parallel data paths and distributes electrical power from the right end of a preceding I\/O bank to the left end of a subsequent I\/O bank. This connection maintains continuous bus structure and execution timing profiles between separated system chassis segments.\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\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-CRL1\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\u003e0.28 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e1 ft cable length layout 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +85 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e33.6 W maximum system capacity loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e7.5 W thermal loss coefficient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n\u003ctd\u003e1.4 A @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e30 V continuous insulation boundary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion Direction\u003c\/td\u003e\n\u003ctd\u003eRight-to-Left bank positioning\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE, UL, CSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDeterministic Backplane Bus Communication\u003c\/h3\u003e\n\u003cp\u003eThe hardware assembly maintains low-latency signal distribution across split expansion chassis, ensuring firmware flash compatibility and keeping I\/O density scaling synchronous with the main controller cycles. The dedicated cable layout maintains stable signal propagation rates through shielded internal copper paths, suppressing noise injection across the internal 24 VDC rails. Proper installation enforces systemic termination parameters on the system bus, allowing remote I\/O data frames to mirror local backplane bus communication velocity constraints without causing packet drop or link corruption.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What specific physical orientation does the 1769-CRL1 cable enforce between I\/O banks?\u003c\/p\u003e\n\u003cp\u003eA: The conductors are specifically configured to transition from the right-hand terminator interface of a local bank to the left-hand bus receiver on a secondary expansion bank.\u003c\/p\u003e\n\u003cp\u003eQ: Does this bus expansion cable support live module changes or hot-swapping?\u003c\/p\u003e\n\u003cp\u003eA: No, modifying backplane connections or removing expansion cables while the system bus is energized will disrupt communication cycles and can induce processor faults.\u003c\/p\u003e\n\u003cp\u003eQ: How does the cable limit voltage drops across extended bus lengths?\u003c\/p\u003e\n\u003cp\u003eA: The internal lines are optimized for a 1.4 A @ 24 VDC backplane current threshold, maintaining voltage variance within standard tolerances over the fixed 1 ft physical run.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003ePower Interruption Protocol: Isolate all electrical supply inputs from the CompactLogix power supply before connecting or disconnecting the bus extension terminals.\u003c\/li\u003e\n\u003cli\u003eBend Radius Control: Route the flexible conductor section with a gradual sweep, avoiding sharp 90-degree creases to protect internal traces from shearing stresses.\u003c\/li\u003e\n\u003cli\u003eLocking Tab Engagement: Seat the right-to-left adapter blocks flush into the module side channels and slide the mechanical retention locks forward to verify continuous electrical path grounding.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":44420344709219,"sku":"1769-CRL1","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/221._2c26a8a1-59d6-4b8c-9477-8c330fbbddb7.jpg?v=1785317149","url":"https:\/\/www.autocontrolglobal.com\/products\/compact-i-o-right-to-left-bus-expansion-cable-allen-bradley-1769-crl1","provider":"AutoControl Global","version":"1.0","type":"link"}