{"product_id":"2711-k5a5l11-allen-bradley-operator-interface-panelview-550","title":"2711-K5A5L11 Allen-Bradley Operator Interface | PanelView 550","description":"\u003ch2\u003eAllen-Bradley 2711-K5A5L11 PanelView 550 Operator Terminal\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFull Model:\u003c\/strong\u003e 2711-K5A5L11\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Allen-Bradley (Rockwell Automation)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Family:\u003c\/strong\u003e PanelView 550\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Keypad Operator Interface Terminal\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Industrial HMI\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUPC:\u003c\/strong\u003e 611320219289\u003c\/p\u003e\n\u003ch3\u003eProduct Overview | A Practical Option for Legacy HMI Maintenance\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 2711-K5A5L11 is a PanelView 550 operator terminal designed for machine-level operator interaction with industrial control applications. Its keypad interface allows operators to navigate screens, enter commands, and interact with configured application functions without relying on a touchscreen.\u003c\/p\u003e\n\u003cp\u003eThe terminal uses a monochrome blue-mode LCD display and a membrane keypad with 10 function keys. A real-time clock supports time-related application functions, while a field-replaceable battery supports clock retention. The terminal also supports an ATA memory card and provides an RS-232 (DH-485) communication interface as specified for this model.\u003c\/p\u003e\n\u003cp\u003eFor plants maintaining established control equipment, this model may be relevant when replacing a failed terminal or retaining an existing PanelView 550 installation. Before ordering, verify the exact catalog number, application file, communication configuration, panel cutout, and firmware or software requirements.\u003c\/p\u003e\n\u003ch3\u003e01 | Technical Data at a Glance\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCatalog Number\u003c\/th\u003e\n\u003ctd\u003e2711-K5A5L11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDisplay Technology\u003c\/th\u003e\n\u003ctd\u003eMonochrome LCD, blue-mode display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDisplay Resolution\u003c\/th\u003e\n\u003ctd\u003eVerify before publication: supplied specifications list both 256 × 128 and 320 × 234 pixels.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOperator Input\u003c\/th\u003e\n\u003ctd\u003eKeypad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFunction Keys\u003c\/th\u003e\n\u003ctd\u003e10, according to the supplied product description\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eKeypad Construction\u003c\/th\u003e\n\u003ctd\u003eStainless-steel domed membrane, as described in the supplied information\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eKey Actuation Rating\u003c\/th\u003e\n\u003ctd\u003e2 million presses, according to the supplied description\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBacklight Life\u003c\/th\u003e\n\u003ctd\u003e10,000 hours, according to the supplied technical information; confirm the specified backlight type and rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePower Supply\u003c\/th\u003e\n\u003ctd\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMaximum Power Consumption\u003c\/th\u003e\n\u003ctd\u003e34 W, as supplied; verify against the manufacturer's manual and nameplate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCurrent Rating\u003c\/th\u003e\n\u003ctd\u003e1.9 A, as supplied; confirm the applicable operating conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCommunication Interface\u003c\/th\u003e\n\u003ctd\u003eRS-232 (DH-485), as supplied; confirm the exact port and cable requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eApplication Runtime Memory\u003c\/th\u003e\n\u003ctd\u003e190 KB, as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eNon-Volatile Memory\u003c\/th\u003e\n\u003ctd\u003e240 KB, as supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRemovable Storage\u003c\/th\u003e\n\u003ctd\u003eATA memory card support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eReal-Time Clock\u003c\/th\u003e\n\u003ctd\u003eIncluded, with field-replaceable battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e192 × 290 × 116 mm (H × W × D), as supplied; verify before panel replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e2.81 lb (1.28 kg) in the supplied technical specifications; another description gives approximately 2 kg, so confirm the actual shipping or net weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eLifecycle Status\u003c\/th\u003e\n\u003ctd\u003eReported as discontinued; confirm current manufacturer status and replacement availability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e02 | How the Terminal Fits into a Control System\u003c\/h3\u003e\n\u003cp\u003eThe terminal functions as the operator-facing layer of a machine control system. The PLC or other supported controller executes the control logic, while the HMI displays configured process information and accepts operator inputs. Communication depends on the installed controller, network arrangement, cable, and application configuration.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperator interaction:\u003c\/strong\u003e Keypad-based navigation and command entry for configured screens and functions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess visibility:\u003c\/strong\u003e Display of application-defined machine status, messages, values, and operating screens.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl interface:\u003c\/strong\u003e Operator commands are transmitted through the supported communication configuration to the connected controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTime-related functions:\u003c\/strong\u003e The real-time clock can support application functions that use timestamps, subject to the application design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication storage:\u003c\/strong\u003e Non-volatile memory and ATA memory card support can be relevant to application retention or transfer workflows; confirm the exact procedure for the installed terminal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe terminal does not independently replace the PLC, motor drive, safety controller, or field I\/O. Its actual operating functions depend on the application loaded into the HMI and the devices configured to communicate with it.\u003c\/p\u003e\n\u003ch3\u003e03 | Typical Equipment and Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy PLC-controlled machinery:\u003c\/strong\u003e Operator stations that still depend on a compatible PanelView 550 application and communication setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging and material handling:\u003c\/strong\u003e Machine-status screens, operator commands, and configured alarm or message displays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduction and assembly equipment:\u003c\/strong\u003e Local operator interaction for established automated work cells.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess skids and utility equipment:\u003c\/strong\u003e Local indication and operator commands where the existing control architecture supports this terminal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance and spare-parts programs:\u003c\/strong\u003e Replacement planning for older equipment where a full HMI migration would require additional engineering and validation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese are typical application contexts for this type of operator terminal, not a guarantee of compatibility with every PLC or machine. Confirm the controller model, communication protocol, application project, and installation dimensions before selecting a replacement.\u003c\/p\u003e\n\u003ch3\u003e04 | Replacement Planning: Verify Before You Buy\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatch the complete catalog number.\u003c\/strong\u003e Confirm that the existing terminal is 2711-K5A5L11, not merely another PanelView 550 model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the communication arrangement.\u003c\/strong\u003e Record the controller model, port type, protocol, cable part number, and any required adapters. Do not assume all RS-232 or DH-485 connections are interchangeable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm application recovery.\u003c\/strong\u003e Determine whether the original application file and any required development software are available. A replacement terminal may not arrive with the site's original application loaded.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasure the panel opening.\u003c\/strong\u003e Check the cutout, mounting clearance, depth, cable bend space, and enclosure layout against the manufacturer's installation documentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify power requirements.\u003c\/strong\u003e Confirm the DC supply voltage, current capacity, polarity, grounding, and protection requirements from the device label and manual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck battery condition.\u003c\/strong\u003e If clock retention matters, inspect the battery condition and follow the specified replacement procedure. Confirm whether the installed unit preserves its time settings after power loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan commissioning.\u003c\/strong\u003e Back up the existing configuration where possible, validate communications, test keypad functions, and verify all critical screens and commands before returning the machine to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003e05 | Diagnostic Guide for Maintenance Teams\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSymptom\u003c\/th\u003e\n\u003cth\u003eLikely Areas to Check\u003c\/th\u003e\n\u003cth\u003eRecommended Action\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal does not power up\u003c\/td\u003e\n\u003ctd\u003e24 V DC supply, wiring polarity, fuse or circuit protection, terminal condition\u003c\/td\u003e\n\u003ctd\u003eMeasure the supply at the terminal under the applicable conditions. Check wiring and protection against the installation manual before replacing the unit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay is blank or difficult to read\u003c\/td\u003e\n\u003ctd\u003ePower supply, display condition, backlight aging, internal hardware fault\u003c\/td\u003e\n\u003ctd\u003eConfirm stable supply voltage and inspect the display after startup. If the backlight or LCD has degraded, compare the cost and risk of repair with a tested replacement unit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController data is unavailable\u003c\/td\u003e\n\u003ctd\u003eCommunication cable, port selection, protocol configuration, controller status, application settings\u003c\/td\u003e\n\u003ctd\u003eVerify the exact communication path and settings. Check the controller separately and use the correct cable and interface for the installed configuration.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKeypad inputs do not respond\u003c\/td\u003e\n\u003ctd\u003eWorn or damaged membrane keys, application focus, configured key functions, terminal fault\u003c\/td\u003e\n\u003ctd\u003eTest multiple keys and screens. Check whether the issue affects all keys or only selected keys, then compare the behavior with the application's configured navigation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock loses time after power interruption\u003c\/td\u003e\n\u003ctd\u003eField-replaceable battery, battery contacts, clock configuration\u003c\/td\u003e\n\u003ctd\u003eFollow the documented battery replacement procedure and verify clock retention after restart. Do not assume battery replacement restores other lost application data.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication does not load or screens are missing\u003c\/td\u003e\n\u003ctd\u003eIncorrect application file, memory or storage issue, project compatibility, incomplete recovery process\u003c\/td\u003e\n\u003ctd\u003eConfirm the application belongs to the exact terminal and supported software environment. Restore only a verified backup and test the application before production use.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostic scope:\u003c\/strong\u003e These checks are a practical troubleshooting sequence, not a list of manufacturer-specific fault codes. This HMI provides operator interaction and display functions; root-cause diagnosis may require separate tests of the PLC, communication network, DC supply, application file, and connected equipment.\u003c\/p\u003e\n\u003ch3\u003e06 | Obsolete Equipment and Supply Considerations\u003c\/h3\u003e\n\u003cp\u003eThis model has been reported as discontinued by the manufacturer. Availability may therefore depend on remaining inventory, surplus stock, or refurbished units. Confirm the status of the exact unit offered before purchase.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew surplus:\u003c\/strong\u003e May be unused inventory from an earlier production period. Confirm packaging, storage condition, and warranty coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefurbished:\u003c\/strong\u003e Ask which functions have been tested, including display, keypad, power-up, communications, and clock retention where applicable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement application:\u003c\/strong\u003e Verify whether the existing project can be restored to the supplied terminal and whether any required software or accessories must be sourced separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMigration alternative:\u003c\/strong\u003e If a direct replacement is unavailable, evaluate a modern HMI migration based on controller communications, application conversion, panel dimensions, and downtime requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e07 | Global PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cblockquote\u003eFor a legacy HMI replacement, matching the catalog number is only the first step. The decisive checks are application availability, communication compatibility, panel fit, and the condition of the display and keypad. A terminal that powers up but cannot load the required application or communicate with the controller is not a successful replacement.\u003c\/blockquote\u003e\n\u003cp\u003eFor maintenance teams, retaining a verified spare can reduce downtime when an established operator station fails. Before purchasing a surplus or refurbished 2711-K5A5L11, request confirmation of its physical condition, functional test scope, included accessories, and warranty terms. If the original application is not backed up, assess recovery feasibility before removing the existing terminal.\u003c\/p\u003e\n\u003ch3\u003e08 | Frequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: What information should I send when requesting a replacement quote?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProvide the complete catalog number, photographs of the product label and rear connections, the controller model, communication cable details, and the condition of the existing unit. If available, include the application backup and panel cutout measurements. These details help establish whether a direct replacement is practical.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: If I buy a replacement terminal, will my existing HMI program already be installed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDo not assume that it will. Confirm in writing whether the offered unit includes the required application. If the original project is available, verify that it is suitable for the replacement terminal and the site's software environment. Plan time for restoration and commissioning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: How should I evaluate a refurbished unit for a critical production line?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRequest a documented test covering power-up, display readability, keypad response, communication testing, and the clock or battery function where feasible. Ask about cosmetic defects, included accessories, warranty coverage, and the procedure for handling a failed unit. Test the replacement in a controlled setting before returning the equipment to normal production.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: What should I do if the terminal displays screens but cannot operate the machine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSeparate the display problem from the control-path problem. Check communication status, controller availability, application configuration, and whether the relevant keys or commands are configured correctly. A visible screen does not prove that controller communications or command execution are working.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: When is it better to migrate to a newer HMI instead of sourcing an obsolete terminal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA direct replacement is often worth evaluating when the original application is recoverable, the machine architecture remains supported, and downtime must be minimized. Migration deserves consideration when compatible stock is unreliable, the application cannot be recovered, communication hardware is difficult to source, or long-term support is a priority. Compare engineering, testing, validation, and downtime costs—not just the purchase price of the terminal.\u003c\/p\u003e\n\u003ch3\u003e09 | Warranty, Shipping and Order Confirmation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12-month warranty, subject to the seller's written warranty terms and confirmation of the supplied item's condition and coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Methods:\u003c\/strong\u003e FedEx, UPS, and DHL, subject to destination and service availability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch Target:\u003c\/strong\u003e 24–48 hours after order and payment confirmation, subject to stock availability and order processing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Condition:\u003c\/strong\u003e Confirm whether the quoted unit is new surplus or refurbished before placing the order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder Verification:\u003c\/strong\u003e Confirm the full catalog number, communication accessories, application availability, and any required mounting or power accessories.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eContact Global PLC Spare HUB for a quote on the Allen-Bradley 2711-K5A5L11 PanelView 550 terminal. Provide the existing terminal details and replacement requirements so stock condition, compatibility, warranty coverage, and delivery arrangements can be checked before purchase.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":67644537634998,"sku":"2711-K5A5L11","price":196.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/2711-K5A5L11.jpg?v=1792048797","url":"https:\/\/www.plcsparehub.com\/products\/2711-k5a5l11-allen-bradley-operator-interface-panelview-550","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}