{"product_id":"mitsubishi-electric-fx3u-32mr-es-melsec-fx3u-series-main-unit-plc","title":"Mitsubishi Electric FX3U-32MR\/ES MELSEC FX3U Series Main Unit PLC","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  Designed for high-speed industrial control architectures, the \u003cstrong\u003eMitsubishi Electric FX3U-32MR\/ES\u003c\/strong\u003e acts as a high-performance main processing unit within the MELSEC FX3U micro PLC family. This unit combines a compact physical footprint with an exceptional execution speed of \u003cstrong\u003e0.065 microseconds\u003c\/strong\u003e per basic instruction. Equipped with \u003cstrong\u003e16 integrated digital inputs\u003c\/strong\u003e (sink\/source selectable) and \u003cstrong\u003e16 relay outputs\u003c\/strong\u003e, it manages complex automation logic directly or scales up to 384 local and network I\/O points via extension blocks and network modules. \n\u003c\/p\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  The platform utilizes a large \u003cstrong\u003e64,000-step\u003c\/strong\u003e internal RAM memory, which is continuously backed up by a built-in lithium battery to protect program integrity. Industrial communication protocols, high-speed counting inputs up to 100 kHz, and expandable positioning features make this main processing unit an incredibly flexible core for modern machine control.\n\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"list-style-type: square; color: #2d3748; padding-left: 20px; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Input Logic:\u003c\/strong\u003e 16 built-in digital inputs supporting both sink (NPN) and source (PNP) configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Relay Outputs:\u003c\/strong\u003e 16 built-in relay outputs rated up to 2 A per point, suitable for switching both AC and DC loads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMassive Program Memory:\u003c\/strong\u003e 64,000 steps of built-in program memory with optional memory cassette loading functionality.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated High-Speed Counters:\u003c\/strong\u003e Supports 1-phase high-speed counting up to 100 kHz and 2-phase counting up to 50 kHz for rotary encoder feedback.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOn-Board Power Distribution:\u003c\/strong\u003e Features an integrated 24 V DC service power supply rated at 400 mA for direct sensor excitation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReal-Time Clock:\u003c\/strong\u003e Standard built-in RTC with automatic leap year correction and deviation of less than 45 seconds per month at 25 degC.\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: 20px; margin-bottom: 1.5rem;\"\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Handling Systems:\u003c\/strong\u003e Conveyor sequencing, sorting lanes, and automated palletizer systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackaging Machinery:\u003c\/strong\u003e Form-fill-seal machines, continuous labeling lines, and capping mechanisms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater and Wastewater Treatment:\u003c\/strong\u003e Pump control station management, level monitoring, and dosing control loops.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpecialized Machine Tools:\u003c\/strong\u003e Woodworking machinery, multi-axis assembly tables, and custom assembly fixtures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications Table\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; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border: 1px solid #e2e8f0;\"\u003eParameter\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border: 1px solid #e2e8f0;\"\u003eSpecification Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eMitsubishi Electric\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eModel Number\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eFX3U-32MR\/ES\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eSeries\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eMELSEC FX3U\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eRated Supply Voltage\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e100 V AC to 240 V AC (85 V AC to 264 V AC allowable)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eRated Frequency\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e50\/60 Hz\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003ePower Consumption\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e35 W\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eBuilt-In Digital Inputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e16 points (24 V DC, sink\/source compatible)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eBuilt-In Digital Outputs\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e16 points (Relay type, mechanical contacts)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eService Power Supply\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e24 V DC, 400 mA\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eInternal Power Capacity\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e5 V DC, 500 mA (for expansion communication)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eExecution Speed\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e0.065 microseconds (Basic instruction)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eMax. Expandable I\/O\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eUp to 256 local digital points (384 points total including network remote I\/O)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eMaximum Load Rating\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e2 A per output point (Resistive load), 80 VA (Inductive load)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eInsulation Type\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003ePhotocoupler insulation (Inputs), Mechanical relay separation (Outputs)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eOutput Response Time\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eApprox. 10 ms (both OFF to ON and ON to OFF)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eCountry of Origin\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eJapan\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eShipping Weight (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e0.65 kg\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003ePackage Dimensions (Calculated)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e150 mm x 90 mm x 86 mm\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eConnections and Interfaces\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  The controller uses physical removable M3 terminal blocks to guarantee secure connections in high-vibration applications. The following physical wiring map outlines standard system power and input\/output routing:\n\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; width: 100%; margin-bottom: 1.5rem;\"\u003e\n  \u003ctable style=\"border-collapse: collapse; width: 100%; color: #2d3748; border: 1px solid #e2e8f0;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"border-bottom: 2px solid #cbd5e0;\"\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border: 1px solid #e2e8f0;\"\u003eTerminal Reference\u003c\/th\u003e\n        \u003cth style=\"padding: 10px; text-align: left; font-weight: bold; border: 1px solid #e2e8f0;\"\u003eAssignment \/ Signal Mapping\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eL, N\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003e100 V AC to 240 V AC System Power Input\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eProtective Ground (FG)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eFunctional and protective system grounding (minimum Class D 100 Ohm or less resistance)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003e24V, 0V (Service Output)\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eAuxiliary 24 V DC power output (400 mA maximum) for sensors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eS\/S Terminal\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eSink \/ Source configuration selector for input group X000 to X017\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eX000 to X017\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eDigital Inputs (X000 to X007 support high-speed hardware counting functions)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eCOM1 to COM4\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003eCommon terminals for corresponding relay outputs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0; font-weight: bold;\"\u003eY000 to Y017\u003c\/td\u003e\n        \u003ctd style=\"padding: 8px; border: 1px solid #e2e8f0;\"\u003ePhysical Relay Output contacts\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eAlternative Models \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  The FX3U-32MR\/ES serves as a direct hardware upgrade path for the legacy FX2N-32MR-ES\/UL units. Although mounting footprints are comparable, users must verify total physical depth clearance because the FX3U model incorporates additional side-bus expansion adapters. If you require transistor switching for high-speed pulse-train outputs (e.g., servo\/stepper control), the \u003cstrong\u003eFX3U-32MT\/ES\u003c\/strong\u003e (transistor output version) should be selected instead of this relay model.\n\u003c\/p\u003e\n\n\u003ch3\u003eApplication Pitfalls \u0026amp; Engineering Notes\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  When switching inductive loads (such as solenoid valves, magnetic contactors, or motor starters) through the integrated relay outputs, voltage surges can severely degrade contact life. To prevent contact welding and electromagnetic interference (EMI), engineers should install an external surge absorber (for AC loads) or a freewheeling diode (for DC loads) across the load. Additionally, keep the total maximum current of the common terminals below the 8 A limit to avoid thermal breakdown of the internal PCB traces.\n\u003c\/p\u003e\n\n\u003ch3\u003eCommissioning \u0026amp; Wiring Tips\u003c\/h3\u003e\n\u003cp style=\"color: #2d3748; margin-bottom: 1rem;\"\u003e\n  Ensure the built-in RUN\/STOP slider switch is set to STOP during initial program downloads via the peripheral port. When utilizing high-speed inputs (X000 to X007) for encoder counting, ensure that twisted-pair shielded cabling is run separately from high-voltage motor conductors. The shielding must be grounded at a single, clean grounding terminal (FG) close to the PLC base unit to avoid creating ground loops that could cause erroneous counting pulses.\n\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  \u003cp style=\"color: #9b2c2c; margin: 0; font-weight: bold;\"\u003e\n    CRITICAL WARNING: Ensure all input power sources (system power and field contact power) are physically isolated and locked out before working on terminal wiring. Failure to de-energize equipment can cause severe electric shock or permanent equipment damage.\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; min-width: 24px; font-weight: bold; margin-right: 10px;\"\u003e1\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eMount the base unit to a standard 35mm DIN rail or utilize the integrated screw mounting holes directly on a clean, vibration-free panel backplate.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; min-width: 24px; font-weight: bold; margin-right: 10px;\"\u003e2\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eLeave at least 50 mm clearance around all sides of the unit inside the electrical enclosure to permit adequate passive convective air cooling.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; min-width: 24px; font-weight: bold; margin-right: 10px;\"\u003e3\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eWire the AC mains supply to the L and N terminal blocks. Securely ground the FG (grounding) terminal with a dedicated wire to prevent high-frequency noise interference.\u003c\/span\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display: flex; align-items: flex-start; margin-bottom: 1rem;\"\u003e\n  \u003cspan style=\"display: flex; align-items: center; justify-content: center; background-color: #2b6cb0; color: #ffffff; border-radius: 50%; width: 24px; height: 24px; min-width: 24px; font-weight: bold; margin-right: 10px;\"\u003e4\u003c\/span\u003e\n  \u003cspan style=\"color: #2d3748;\"\u003eSelect sink or source input functionality by wiring the S\/S terminal according to your external sensor's transistor structure.\u003c\/span\u003e\n\u003c\/div\u003e","brand":"Mitsubishi Electric","offers":[{"title":"Default Title","offer_id":53102155006315,"sku":"FX3U-32MR\/ES","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/FX3U-32MRES-snsiuphvaj0.png?v=1776137542","url":"https:\/\/www.plcprotech.com\/pt\/products\/mitsubishi-electric-fx3u-32mr-es-melsec-fx3u-series-main-unit-plc","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}