{"product_id":"allen-bradley-1769-l20-compactlogix-processor-module","title":"Allen-Bradley 1769-L20 CompactLogix Processor Module","description":"\u003ch2\u003eAllen-Bradley 1769-L20 CompactLogix Processor Module\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1769-L20\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e1769-L20\u003c\/strong\u003e Processor Module, operates as a dedicated hardware component for specific technical task execution within CompactLogix 1769 platforms. The unit coordinates local backplane operations and manages asynchronous serial communication lines directly from the embedded processing core.\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-L20\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\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.75 lbs (0.34 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 1769 module width\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\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e800 mA @ 5 VDC backplane current draw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUser Memory\u003c\/td\u003e\n\u003ctd\u003e0.75 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 8 local 1769 I\/O modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Ports\u003c\/td\u003e\n\u003ctd\u003e1 x RS-232 serial port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Expansion Options\u003c\/td\u003e\n\u003ctd\u003eDeviceNet, EtherNet\/IP, ControlNet via network modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotion Control Axis Capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 2 axes via SERCOS interface module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProgramming Protocols\u003c\/td\u003e\n\u003ctd\u003eDF1, ASCII, Modbus RTU\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\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5% to 95% RH, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReplacement Terminal Block\u003c\/td\u003e\n\u003ctd\u003e1769-RTBN18\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size (Solid)\u003c\/td\u003e\n\u003ctd\u003e22 to 14 AWG copper wire rated for 90 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size (Stranded)\u003c\/td\u003e\n\u003ctd\u003e22 to 16 AWG copper wire rated for 90 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Software\u003c\/td\u003e\n\u003ctd\u003eRSLogix 5000 \/ Studio 5000 Logix Designer\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 Network Architecture\u003c\/h3\u003e\n\u003cp\u003eThe local logic engine governs up to 8 local modules, maintaining a stable backplane bus communication velocity across the internal hardware bus. Industrial networks require precise data prioritization; consequently, this controller implements fixed scan allocations to stabilize I\/O density scaling. The embedded firmware flash compatibility guarantees deterministic scheduling for linked peripheral networks including EtherNet\/IP or DeviceNet. When integrating up to 2 axes of synchronized motion via a SERCOS interface module, the local 0.75 MB memory registers compute step executions linearly without interrupting standard discrete program cycles.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 1769-L20 processor module support the installation of more than 8 local modules if an expansion power supply is used?\u003c\/p\u003e\n\u003cp\u003eA: No. The internal processor firmware enforces a strict hardware limit of 8 local I\/O modules max. To expand total I\/O point count past this limit, engineers must establish a remote network drop using a communication interface adapter.\u003c\/p\u003e\n\u003cp\u003eQ: Can an engineer swap or replace the 1769-L20 module while the power distribution rail remains live?\u003c\/p\u003e\n\u003cp\u003eA: No. The 1769 chassis platform lacks structural provisions for active circuit separation. Operators must isolate all power lines from the backplane before removing or inserting modules to avert data corruption and component failure.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Attachment Verification\u003c\/strong\u003e: Mount the processor module firmly onto standard symmetrical DIN rail tracks. Lock the side-locking mechanism securely to establish adequate structural rigidity and grounding continuity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBus Termination Implementation\u003c\/strong\u003e: Install a 1769 right-end cap onto the final module of the local bank. The controller cannot clear internal bus faults if this terminating resistor network remains disconnected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Wiring Restrictions\u003c\/strong\u003e: Terminate all RS-232 serial links using shielded cable options. Strip solid or stranded copper wire (rated for 90 deg C minimum) to the specified length before securing the terminals inside the 1769-RTBN18 block.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":44419236986979,"sku":"1769-L20","price":310.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/216._9fe2d1f7-78ad-4b39-a8dd-9f8631677eeb.jpg?v=1785313171","url":"https:\/\/www.autocontrolglobal.com\/products\/allen-bradley-1769-l20-compactlogix-processor-module","provider":"AutoControl Global","version":"1.0","type":"link"}