Mitsubishi FX2N-128MR-ES/UL Relay Output PLC Module – MELSEC FX2N Series
When a programmable logic controller fails mid-production, the consequences cascade instantly: conveyor lines halt, robotic arms freeze, and entire manufacturing cells go dark. Unplanned downtime in industrial environments costs thousands of dollars per hour — and sourcing a certified replacement quickly is the difference between a brief interruption and a catastrophic production loss. The Mitsubishi FX2N-128MR-ES/UL is the proven answer: a field-hardened, UL-listed relay output PLC module engineered to restore control and keep critical processes running.
Within the MELSEC FX2N family — Mitsubishi Electric’s flagship compact PLC series that has anchored factory automation globally for over two decades — the FX2N-128MR-ES/UL occupies the top tier of the standard I/O lineup. With 128 I/O points in a compact DIN-rail package, it delivers the processing headroom and relay output robustness demanded by mid-to-large machine builders across automotive, food & beverage, packaging, and material handling industries worldwide. Its UL certification and ES/UL dual-standard compliance make it the preferred choice for North American and international OEM projects alike.
Technical Specifications
- Model: FX2N-128MR-ES/UL
- Series: MELSEC FX2N
- Brand: Mitsubishi Electric
- I/O Points: 128 (64 inputs / 64 outputs)
- Output Type: Relay output (MR)
- Power Supply: 100–240 V AC
- Input Voltage: 24 V DC sink/source
- Program Memory: 8,000 steps (expandable to 16,000 steps with memory cassette)
- Processing Speed: 0.08 μs/basic instruction
- Communication Ports: RS-422 (built-in programming port)
- Expansion Capability: Up to 8 extension modules (max 256 I/O)
- Operating Temperature: 0°C to 55°C
- Storage Temperature: -25°C to 75°C
- Humidity: 5% to 95% RH (non-condensing)
- Certifications: UL, CE, cUL
- Weight: Approx. 2,900 g (with base unit)
- Mounting: DIN rail or direct panel mount
Note: Specifications are based on Mitsubishi Electric official documentation. Always verify against the current datasheet for your application.
Key Features & Benefits
- 128 I/O in a Compact Footprint: Maximizes control density without requiring a rack-based PLC system, reducing panel space and wiring complexity.
- Relay Output Versatility: Drives AC and DC loads directly — motors, solenoids, indicators, and contactors — without additional output relays in most applications.
- UL & CE Dual Certification: Meets North American (UL 508) and European safety standards, simplifying machine certification for global OEM exports.
- High-Speed Processing: 0.08 μs per basic instruction enables precise, real-time control of fast-moving processes and multi-axis coordination.
- Expandable Architecture: Seamlessly integrates with the full FX2N extension module ecosystem — analog I/O, high-speed counters, communication adapters — for future-proof scalability.
- Proven Reliability: MELSEC FX2N has accumulated millions of installed units globally, with a track record of 10+ year service life in harsh industrial environments.
- GX Developer / GX Works2 Compatible: Programs with Mitsubishi’s standard IEC 61131-3 compliant software, protecting your existing code investment.
Industry & Equipment Applications
- Automotive Manufacturing: Body welding lines, paint shop conveyors, assembly station sequencing
- Food & Beverage: Filling and capping machines, pasteurization control, packaging line coordination
- Packaging Machinery: Cartoning, palletizing, shrink-wrap, and labeling equipment
- Material Handling: Conveyor systems, sortation lines, automated storage and retrieval (AS/RS)
- Textile & Printing: Tension control, register control, web handling systems
- Water Treatment: Pump sequencing, valve control, SCADA integration
- Building Automation: HVAC control panels, elevator logic, access control systems
System Integration & Compatible Parts
The FX2N-128MR-ES/UL is the central controller in a rich Mitsubishi MELSEC FX2N ecosystem. Commonly integrated companion parts include:
- FX2N-16EX / FX2N-32EX: Digital input expansion modules
- FX2N-16EYR / FX2N-32EYR: Relay output expansion modules
- FX2N-4AD / FX2N-4DA: Analog input/output modules for process control
- FX2N-1HC: High-speed counter module for encoder feedback
- FX2N-232-BD / FX2N-485-BD: RS-232/RS-485 communication boards for HMI and SCADA connectivity
- FX2N-CNV-BD: Communication conversion board for network adapters
- GOT1000 / GOT2000 Series HMI: Mitsubishi touchscreen operator panels with native FX2N protocol support
Need a complete bill of materials for your control panel? Contact our technical team — we source full FX2N system configurations.
Our Quality Assurance Process
Every Mitsubishi FX2N-128MR-ES/UL unit shipped from Konmask.com undergoes a structured verification process:
- Source Verification: Units are sourced from authorized distributors and verified original-equipment channels with traceable supply chain documentation.
- Visual Inspection: Label authenticity, housing integrity, connector condition, and serial number verification against Mitsubishi’s genuine product markers.
- Functional Pre-check: Power-on self-test and LED status verification prior to packaging.
- Anti-static Packaging: Shipped in ESD-safe bags with foam cushioning and moisture-barrier outer cartons.
- Documentation: Datasheet, test record, and packing list included with every shipment.
How to Order
- Step 1 — Submit Inquiry: Use the inquiry form on this page or email support@konmask.com with your required quantity and delivery timeline.
- Step 2 — Receive Quotation: Our team responds within 1 business day with pricing, lead time, and availability confirmation.
- Step 3 — Order Confirmation: Confirm the proforma invoice and select your preferred payment method (T/T, L/C, PayPal for small orders).
- Step 4 — Shipment: We ship via DHL, FedEx, UPS, or sea freight with full tracking and export documentation (commercial invoice, packing list, COO).
- Step 5 — After-sales Support: Our engineers are available post-delivery for integration questions and warranty claims.
Why Choose Konmask.com?
- Industrial Automation Specialists: We focus exclusively on PLC, DCS, servo, and automation components — not a generalist marketplace.
- Genuine Parts Guarantee: Every unit is sourced with verifiable provenance. We do not deal in counterfeit or refurbished-as-new parts.
- Global Export Experience: We have shipped to 40+ countries with full customs documentation support, including Form E, EUR.1, and CO certificates.
- Technical Pre-sales Support: Our engineers can review your application requirements and recommend the correct module configuration before you order.
- Competitive Lead Times: In-stock items ship within 3–5 business days; sourced items typically within 2–4 weeks.
- Dedicated Account Management: B2B clients receive a dedicated contact for repeat orders, blanket POs, and project-based procurement.
Frequently Asked Questions
Q: What is the difference between FX2N-128MR-ES/UL and FX2N-128MT-ESS/UL?
A: The MR suffix denotes relay output, suitable for driving AC/DC loads directly. The MT suffix denotes transistor (sink) output, which offers faster switching speeds (suitable for pulse outputs and high-frequency applications) but is limited to DC loads. Choose MR for general-purpose machine control; choose MT when you need high-speed pulse output for stepper or servo drives.
Q: Is the FX2N-128MR-ES/UL still in production?
A: The FX2N series has been officially discontinued by Mitsubishi Electric, with the FX5U series as the recommended successor. However, genuine new-old-stock (NOS) and surplus units remain available. Konmask.com maintains stock and sourcing channels for FX2N modules to support existing installed base maintenance and replacement needs.
Q: Can I use GX Works3 to program the FX2N-128MR-ES/UL?
A: No. The FX2N series is compatible with GX Developer and GX Works2 only. GX Works3 supports FX5U and iQ-R/iQ-F series. Ensure you use the correct software version for your project.
Q: What is the maximum number of I/O points with expansion modules?
A: The FX2N base unit supports up to 8 extension modules, bringing the maximum I/O to 256 points. Additional special function modules (analog, communication, positioning) can also be added within the extension bus limits.
Q: Do you provide a warranty on this product?
A: Yes. We offer a 12-month warranty against manufacturing defects on all genuine units. Warranty claims are handled directly by our technical team with replacement or repair options.
Q: Can you supply the FX2N-128MR-ES/UL with a full system BOM?
A: Absolutely. We regularly supply complete FX2N control system packages including expansion modules, communication boards, HMI panels, and programming cables. Contact us with your project requirements.
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