Mitsubishi FX2N-128MR-ES/UL Programmable Logic Controller – FX2N Series
When a production line loses its PLC, everything stops. Conveyors freeze, robotic arms halt mid-cycle, and safety interlocks go dark — costing manufacturers thousands of dollars per hour in unplanned downtime. The controller at the heart of these systems is not a commodity; it is the brain of the operation. Without a reliable, specification-matched replacement, even a minor fault can cascade into a full-facility shutdown.
The Mitsubishi FX2N-128MR-ES/UL is the flagship model of Mitsubishi Electric’s FX2N series — the most widely deployed compact PLC platform in Asia-Pacific and a proven workhorse across North American and European manufacturing floors. With 128 I/O points (64 inputs / 64 relay outputs), UL certification, and full compatibility with the FX2N expansion ecosystem, this unit occupies the top tier of the FX2N lineup and remains one of the most specified compact PLCs in global industrial automation.
Technical Specifications
- Model: FX2N-128MR-ES/UL
- Series: Mitsubishi FX2N
- I/O Points: 128 total — 64 inputs / 64 relay outputs
- Output Type: Relay (MR)
- Power Supply: 100–240 V AC, 50/60 Hz
- Program Memory: 8,000 steps (expandable to 16,000 with memory cassette)
- Processing Speed: 0.08 µs/basic instruction
- Built-in High-Speed Counters: 6 channels, up to 60 kHz
- Communication Ports: RS-422 (programming port); expandable via FX2N-232-BD / FX2N-485-BD
- Expansion Modules: Up to 8 extension units / blocks
- Max Expandable I/O: 256 points
- Certifications: UL Listed, CE Marked
- Operating Temperature: 0–55 °C
- Weight: Approx. 1,620 g
- Dimensions (W × H × D): 480 × 90 × 87 mm
Key Features & Benefits
- High-Density I/O in Compact Form: 128 I/O points in a single base unit eliminates the need for additional expansion racks in most mid-scale applications, reducing panel footprint and wiring complexity.
- Relay Output Versatility: MR-type relay outputs switch both AC and DC loads without external interface relays, simplifying circuit design for solenoids, contactors, and indicator lamps.
- UL Listing for North American Compliance: The ES/UL suffix confirms UL 508 listing, making this unit suitable for UL-compliant control panels in the US and Canada without additional certification burden.
- Proven FX2N Instruction Set: Over 200 applied instructions including PID, floating-point arithmetic, and interrupt routines — enabling sophisticated control logic without a motion controller.
- Broad Expansion Ecosystem: Compatible with the full FX2N special function module library: analog I/O, temperature, positioning, communication, and more.
- Long-Term Parts Availability: FX2N remains one of the most stocked legacy PLC platforms globally, ensuring spare parts and compatible modules are readily available for maintenance teams.
Industry & Equipment Applications
- Automotive Manufacturing: Body welding lines, paint shop conveyors, assembly transfer systems
- Food & Beverage Processing: Filling and capping machines, pasteurization control, packaging lines
- Textile & Printing: Loom sequencing, tension control, color registration systems
- Material Handling: Palletizers, sortation conveyors, automated storage and retrieval systems (ASRS)
- Water & Wastewater Treatment: Pump station control, dosing systems, filtration sequencing
- Building Automation: HVAC control panels, elevator logic, access control integration
- OEM Machine Builders: Standard platform for mid-range machines requiring UL-listed control
System Integration & Compatible Parts
The FX2N-128MR-ES/UL is the central node of a well-documented control architecture. Commonly paired components include:
- Communication Boards: FX2N-232-BD (RS-232), FX2N-485-BD (RS-485/Modbus), FX2N-CNV-BD
- Analog Modules: FX2N-4AD, FX2N-4DA, FX2N-8AD
- Temperature Modules: FX2N-4AD-TC, FX2N-4AD-PT
- Positioning Modules: FX2N-1PG, FX2N-10PG
- Memory Cassettes: FX2N-RAM-8L, FX2N-EEPROM-8L, FX2N-FLROM-16
- Programming Software: GX Developer, GX Works2 (FX2N compatible mode)
- HMI: Mitsubishi GOT1000 / GOT2000 series via RS-422
Our Quality Assurance Process
Every FX2N-128MR-ES/UL unit shipped from Konmask.com undergoes a structured verification process before dispatch:
- Visual Inspection: Housing integrity, terminal condition, label authenticity, and seal verification
- Functional Power-On Test: Unit powers up, self-diagnostic LEDs cycle correctly, and communication port responds
- Documentation Check: Serial number logged, firmware version recorded, original packaging confirmed where available
- Sourcing Transparency: Units sourced from authorized distributors or verified industrial surplus channels; counterfeit-risk screening applied to all Mitsubishi Electric products
How to Order
- Submit your inquiry via the Contact / Request a Quote form on this page
- Include your required quantity, delivery timeline, and destination country
- Our team responds within 1 business day with availability confirmation and a formal quotation
- Upon PO receipt, we arrange export documentation, packaging, and freight — DDP, DAP, or EXW terms available
Why Choose Konmask.com?
- Specialized in industrial automation components — not a general electronics marketplace
- Experienced export team handling customs documentation for 30+ destination countries
- Flexible trade terms: T/T, L/C, Western Union, and PayPal accepted
- Dedicated after-sales support for compatibility questions and installation guidance
- Long-term supplier relationships ensure consistent access to hard-to-find legacy PLCs
Frequently Asked Questions
Q: Is the FX2N-128MR-ES/UL still in production?
A: Mitsubishi Electric has transitioned the FX2N series to end-of-life status. However, Konmask.com maintains stock of genuine units sourced from verified channels to support ongoing maintenance and replacement needs.
Q: What is the difference between FX2N-128MR-ES/UL and FX2N-128MT-ESS/UL?
A: The MR suffix denotes relay outputs; the MT suffix denotes transistor (sink) outputs. Relay outputs handle both AC and DC loads and are preferred for general-purpose switching. Transistor outputs offer faster switching speeds and are suited for high-frequency pulse outputs and servo drives.
Q: Can this PLC communicate with third-party HMIs or SCADA systems?
A: Yes. With the FX2N-485-BD communication board installed, the unit supports Modbus RTU protocol, enabling integration with most third-party HMIs, SCADA platforms, and inverters.
Q: What programming software is required?
A: GX Developer (version 8.x or later) or GX Works2 in FX2N-compatible mode. Both are available from Mitsubishi Electric’s software portal.
Q: Do you provide a warranty?
A: Yes. All units are covered by Konmask.com’s standard 90-day functional warranty. Extended warranty options are available upon request for volume orders.
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