{"product_id":"mitsubishi-electric-fx2n-128mr-001-melsec-fx2n-series-plc-main-unit","title":"Mitsubishi Electric FX2N-128MR-001 MELSEC FX2N Series PLC Main Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eManaging up to 128 local I\/O points, the \u003cstrong\u003eMitsubishi Electric FX2N-128MR-001\u003c\/strong\u003e serves as a high-density controller within the legacy MELSEC FX2N micro-PLC architecture. This base unit integrates \u003cstrong\u003e64 digital inputs\u003c\/strong\u003e (24V DC, sink\/source selectable) and \u003cstrong\u003e64 relay outputs\u003c\/strong\u003e in a single, space-efficient housing, providing a reliable point of control for high-I\/O machinery and assembly lines. Designed to support modular expansion, the unit accommodates FX2N series extension blocks, analog modules, and communications adapters to scale control system capabilities as process demands evolve.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-in-One High-Density Control:\u003c\/strong\u003e Packs 128 physical input\/output terminals in one chassis, reducing cabinet space requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Input Configuration:\u003c\/strong\u003e Configurable for sink or source logic via a simple hardware terminal connection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Relay Outputs:\u003c\/strong\u003e Dry contact relay outputs support up to 2A per channel for switching AC or DC control circuit loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExpandable Architecture:\u003c\/strong\u003e Built-in bus interface allows seamless connection of additional digital and functional expansion blocks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProgram Memory Cassette Support:\u003c\/strong\u003e Includes a slot for optional EEPROM or Flash memory cassettes for easy program backup and transfer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eApplications\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Handling Systems:\u003c\/strong\u003e Conveyor sorting, palletizer control, and multi-station transfer tables.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaging Machinery:\u003c\/strong\u003e Multi-lane filling, form-fill-seal machines, and heavy carton sealing plants.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomotive Assembly Cells:\u003c\/strong\u003e Coordinating pneumatic actuators, rotary tables, and localized safety interlocks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMunicipal Water Management:\u003c\/strong\u003e Multi-pump control stations with auxiliary monitoring elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\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; font-size: 0.95rem;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eFX2N-128MR-001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eSeries Name\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eMELSEC FX2N\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eSupply Voltage\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e100 to 240 V AC (+10% \/ -15%), 50\/60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003ePower Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e100 VA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eIntegrated Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e64 Channels (24V DC, 7mA, Sink\/Source selectable)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eIntegrated Outputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e64 Channels (Relay contacts, 2A\/point, 8A\/common)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eResponse Time (Inputs)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eApprox. 10 ms (adjustable via software filters)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eResponse Time (Outputs)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eApprox. 10 ms (mechanical relay drop-out \/ pull-in)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eProgramming Language\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eInstruction List (IL), Ladder Logic (LD), SFC\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eOperating Temperature\u003c\/td\u003e\n        \u003ctd style=\"padding: 0 to 55 degC;\"\u003e0 to 55 Celsius\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eJapan\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e3.0 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e350 mm x 110 mm x 90 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eTerminal Layout \u0026amp; Circuit Configuration\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; font-size: 0.95rem;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #2b6cb0;\"\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eTerminal Block Section\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eTerminal Label\u003c\/th\u003e\n        \u003cth style=\"text-align: left; padding: 8px; font-weight: bold;\"\u003eFunctional Assignment\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003ePower \u0026amp; Ground\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eL, N, PE\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e100-240V AC Line, Neutral, and Protective Earth connections\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eService Power Supply\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e24V, 0V\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e24V DC auxiliary power output for external sensors (max 460mA)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eInput Logic Common\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eS\/S\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eSink \/ Source selection terminal (connect to 24V or 0V)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eDigital Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eX0 to X77\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e64 octal-addressed digital inputs (X0-X7, X10-X17... X70-X77)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n        \u003ctd style=\"padding: 8px; font-weight: bold;\"\u003eDigital Outputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003eY0 to Y77\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px;\"\u003e64 octal-addressed dry relay contacts grouped by common terminals\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003eThe FX2N series is a legacy line. When updating systems utilizing the \u003cstrong\u003eFX2N-128MR-001\u003c\/strong\u003e, the direct, modern replacement from Mitsubishi Electric is the \u003cstrong\u003eFX3U-128MR\/ES-A\u003c\/strong\u003e. While the FX3U model features structural and dimension alignment for easy retrofitting, there are critical considerations:\u003c\/p\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProgram Migration:\u003c\/strong\u003e Legacy programs from FX2N can be converted to FX3U format inside GX Developer or GX Works2\/3 software. Be sure to review instruction sets since execution times on FX3U are significantly faster, which can impact legacy software-timed loops.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTerminal Block Wiring:\u003c\/strong\u003e Terminal block layouts are nearly identical, but terminal pitch and physical width of the modules should be cross-verified before swapping to ensure panel depth clearing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; margin-bottom: 1.5rem; padding-left: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelay Contact Derating:\u003c\/strong\u003e Inductive AC loads (solenoids, contactors) create large voltage spikes at drop-out. For maximum relay lifetime, install surge absorbers (RC networks) parallel to the load. For DC inductive loads, always install a freewheeling diode.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e In enclosed control panels, always mount this high-I\/O unit horizontally to ensure convective airflow. Vertical mounting restricts airflow and can lead to premature thermal degradation of the internal power supply module.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInrush Current:\u003c\/strong\u003e The 100-240V AC power supply block has an inrush current rating that can reach up to 40A at peak. Ensure upstream circuit breakers are sized with a suitable delay curve to prevent nuisance tripping on power-up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #1a365d; margin-top: 1.5rem; margin-bottom: 0.5rem;\"\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cdiv style=\"background-color: #fff5f5; border-left: 4px solid #c53030; padding: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cp style=\"margin: 0; font-weight: bold; color: #9b2c2c;\"\u003eCRITICAL WARNING:\u003c\/p\u003e\n  \u003cp style=\"margin: 0.5rem 0 0 0; color: #2d3748; font-size: 0.95rem;\"\u003eRisk of severe electrical shock. Completely disconnect and isolate all AC and DC external power sources before opening terminal covers or performing wiring. Failure to do so can result in equipment destruction, fire, or severe injury.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.5rem;\"\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 0.9rem;\"\u003e1\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; font-size: 0.95rem;\"\u003eMount the unit on a standard 35mm DIN rail or secure it directly to the cabinet backplate using the integrated screw mounting holes. Always maintain a minimum clearance of 50mm on all sides of the unit for heat dissipation.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 0.9rem;\"\u003e2\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; font-size: 0.95rem;\"\u003eTerminate the AC power feed (L and N) and protective earth ground (PE). Ensure a low-resistance chassis ground path to mitigate high-frequency electrical noise.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 0.9rem;\"\u003e3\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; font-size: 0.95rem;\"\u003eWire the \u003cstrong\u003eS\/S\u003c\/strong\u003e (Sink\/Source) terminal. For sink configuration, jumper the S\/S terminal to the 24V terminal. For source configuration, jumper S\/S to the 0V terminal.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"display: flex; align-items: flex-start; gap: 1rem;\"\u003e\n    \u003cdiv style=\"background-color: #2b6cb0; color: #ffffff; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 0.9rem;\"\u003e4\u003c\/div\u003e\n    \u003cdiv style=\"color: #2d3748; font-size: 0.95rem;\"\u003eVerify all wire connections and terminal block screws are tightened to the specified torque rating (0.5 to 0.8 N-m) before applying power to prevent terminal overheating.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102156251499,"sku":"FX2N-128MR-001","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/FX2N-128MR-001-ekwmh1m3xcg.png?v=1776137523","url":"https:\/\/www.plcprotech.com\/id\/products\/mitsubishi-electric-fx2n-128mr-001-melsec-fx2n-series-plc-main-unit","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}