{"product_id":"honeywell-51402755-100-k4lcn-4-processor-card","title":"Honeywell 51402755-100 K4LCN-4 Processor Card","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eExecuting central command and control operations within legacy distributed control architectures, the \u003cstrong\u003eHoneywell 51402755-100\u003c\/strong\u003e manages complex logic processing and interface bus timing for the K4LCN-4 Local Control Network assemblies. This processing module is engineered specifically to maintain high-throughput communication across the TDC 3000 and TPS control backplanes, ensuring reliable, low-latency execution of process control loops and database transactions in demanding environments.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eHigh-density microprocessing board architecture optimized for real-time Honeywell Local Control Network (LCN) operations.\u003c\/li\u003e\n  \u003cli\u003eDirect integration with TDC 3000 \/ TPS card files without requiring chassis modifications.\u003c\/li\u003e\n  \u003cli\u003eOnboard diagnostic indicators for rapid hardware and communication status verification.\u003c\/li\u003e\n  \u003cli\u003eRobust thermal construction designed to withstand industrial-grade cabinet operating temperatures.\u003c\/li\u003e\n  \u003cli\u003eLow-power CMOS components integrated to reduce internal thermal load and extend component lifespan.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 1.5rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003eHoneywell TDC 3000 Distributed Control Systems (DCS) maintenance and expansion.\u003c\/li\u003e\n  \u003cli\u003eLegacy Local Control Network (LCN) infrastructure support in continuous process plants.\u003c\/li\u003e\n  \u003cli\u003eRefinery, petrochemical, and power generation control room operations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold; width: 35%;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eHoneywell\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003ePart Number \/ SKU\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e51402755-100\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eProcessor Designation\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eK4LCN-4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eSystem Compatibility\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eHoneywell TDC 3000 \/ TPS\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eModule Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eProcessor Card\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003e5.0 kg (11.02 lbs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 0.75rem; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 0.75rem;\"\u003eUnited States\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEmpirical Engineering Insights\u003c\/h3\u003e\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe K4LCN-4 model serves as a direct functional replacement for older K4LCN hardware revisions (such as K4LCN-2 or K4LCN-3), providing improved thermal profiles and reliable memory execution. Ensure that your LCN software and system release level support the K4LCN-4 revision prior to physical board swap-out.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eOperating legacy Honeywell card files in enclosed cabinets requires consistent forced-air cooling. Degradation of cabinet cooling fans is the primary contributor to processor board overheating, which can manifest as intermittent LCN connection drops or unexpected processor halt codes. Maintain clear airflow pathways around the chassis.\u003c\/p\u003e\n\n\u003ch4 style=\"color: #1a365d; margin-top: 1rem; margin-bottom: 0.5rem;\"\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h4\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eAlways verify the integrity of the gold-plated edge connectors on the back of the card before insertion. Dust and atmospheric contaminants in industrial settings can prevent secure contact with the card file backplane, leading to intermittent power delivery or data loss on the LCN.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cstrong style=\"color: #9b2c2c; display: block; margin-bottom: 0.5rem;\"\u003eCRITICAL WARNING\u003c\/strong\u003e\n  \u003cp style=\"color: #9b2c2c; margin: 0;\"\u003eDo not insert or remove this card while the card file backplane is energized. Live insertion (hot-swapping) can cause destructive high-voltage transients on the backplane data bus, leading to permanent damage to this processor card and adjacent communication modules. Ensure complete subsystem de-energization before executing replacement procedures.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e1\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eIsolate and verify the target card file chassis is completely powered down.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e2\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eEquip a calibrated electrostatic discharge (ESD) wrist strap connected to a verified earth ground point.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e3\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eAlign the processor card with the card file guide rails, sliding the card smoothly into the slot until the backplane connectors seat firmly.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 2rem; height: 2rem; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; margin-right: 0.75rem;\"\u003e4\u003c\/div\u003e\n    \u003cp style=\"color: #2d3748; margin: 0; padding-top: 0.25rem;\"\u003eSecure the card using the integrated chassis retaining screws to prevent structural shifting due to ambient industrial vibration.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52679305920875,"sku":"51402755-100","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/51402755-100-xnfvp0xe1o4_80a36c89-ed18-4754-ba18-68425b5e4d95.jpg?v=1765958176","url":"https:\/\/www.plcprotech.com\/ms\/products\/honeywell-51402755-100-k4lcn-4-processor-card","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}