MITSUBISHI FX3U-80MR/ES Programmable Controller | Replacement, Equivalent & Selection Guide
The Mitsubishi FX3U-80MR/ES is a high-performance compact PLC from the FX3U series — Mitsubishi Electric’s flagship third-generation micro-PLC platform. With 80 I/O points (40 inputs / 40 relay outputs), AC power supply, and a rich built-in instruction set, it is widely deployed in machine automation, conveyor control, and process sequencing across industrial sectors worldwide.
This page provides full technical specifications, verified compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Model: FX3U-80MR/ES
- Brand: Mitsubishi Electric (MELSEC)
- Series: FX3U
- I/O Points: 80 (40 DI / 40 DO)
- Output Type: Relay (R)
- Power Supply: AC 100–240 V
- Program Memory: 64,000 steps (with memory cassette)
- Processing Speed: 0.065 μs / basic instruction
- Communication Ports: RS-422 (built-in); expandable via option boards
- Expansion Capability: Up to 256 I/O via expansion modules
- Built-in Functions: High-speed counters (6 channels, max 100 kHz), pulse output (3 axes), interrupt inputs
- Analog Option: Via FX3U-4AD / FX3U-4DA expansion adapters
- Operating Temperature: 0 °C to 55 °C
- Protection Rating: IP20
- Dimensions (W×H×D): 220 × 90 × 87 mm
- Weight: Approx. 900 g
- Certifications: CE, UL, cUL
Compatible Replacement & Equivalent Models
The following models are verified as direct or near-direct replacements for the FX3U-80MR/ES. Always confirm I/O count, output type, and power supply before substitution.
| Model | Brand | I/O | Output | Power | Notes |
|---|---|---|---|---|---|
| FX3U-80MT/ES | Mitsubishi | 80 | Transistor (Sink) | AC | Same series; use for high-speed pulse output applications |
| FX3U-80MR/DS | Mitsubishi | 80 | Relay | DC 24 V | DC-powered variant; pin-compatible |
| FX5U-80MR/ES | Mitsubishi | 80 | Relay | AC | Next-gen FX5U; enhanced speed & Ethernet built-in; program migration required |
| FX3GE-40MR/ES + FX2N-40EX | Mitsubishi | 80 (combined) | Relay | AC | Budget alternative; lower processing speed |
| DVP80EH00R2 | Delta | 80 | Relay | AC | Third-party equivalent; IEC 61131-3 compatible; requires reprogramming |
| XC3-60R-E + expansion | XINJE | ~80 | Relay | AC | Economy-grade alternative; suitable for non-critical applications |
⚠ Disclaimer: Third-party equivalents require independent validation. Konmask.com recommends testing in a non-production environment before deployment.
Why Choose the Original Model
- Proven Reliability: FX3U is one of the most widely deployed micro-PLC platforms globally, with a 15+ year field track record.
- Rich Ecosystem: Extensive library of FX3U-compatible expansion modules, communication adapters, and HMI panels.
- GX Works2 / GX Works3 Support: Full programming, simulation, and diagnostics via Mitsubishi’s official engineering software.
- Spare Parts Availability: Broad global distributor network ensures long-term parts and support availability.
- Regulatory Compliance: CE / UL certified for use in regulated industries including food & beverage, pharmaceutical, and automotive.
Typical Applications
- Conveyor and material handling systems
- Packaging and labeling machinery
- CNC auxiliary control and tool changers
- HVAC and building automation panels
- Water treatment and pump station control
- Assembly line sequencing and interlocking
- Textile and printing machine control
System Compatibility
- Programming Software: GX Works2 (recommended), GX Developer
- HMI Compatibility: Mitsubishi GOT1000 / GOT2000 series; third-party HMIs via RS-422 / RS-485 adapters
- Communication Protocols: MELSEC, Modbus RTU (via FX3U-485ADP-MB), CC-Link (via FX3U-16CCL-M)
- Expansion Modules: FX3U-□EX (input), FX3U-□EY (output), FX3U-4AD, FX3U-4DA, FX3U-232ADP, FX3U-485ADP
- Motion Control: Up to 3-axis independent pulse output; compatible with FX3U-20SSC-H for SSCNET III servo control
Selection Guide
Use the decision matrix below to select the correct FX3U variant or upgrade path:
| Requirement | Recommended Model |
|---|---|
| 80 I/O, relay output, AC power (standard) | FX3U-80MR/ES ✓ This model |
| 80 I/O, high-speed pulse output needed | FX3U-80MT/ES (transistor output) |
| 80 I/O, DC 24 V panel power supply | FX3U-80MR/DS |
| Upgrade path with built-in Ethernet & higher speed | FX5U-80MR/ES (next generation) |
| Fewer I/O needed (cost reduction) | FX3U-48MR/ES (48 I/O) or FX3U-64MR/ES (64 I/O) |
| More I/O needed (>80 points) | FX3U-128MR/ES or add FX3U expansion modules |
| Budget-sensitive, non-Mitsubishi acceptable | Delta DVP80EH00R2 or XINJE XC3 series |
Quality Assurance & Sourcing
- Genuine Units: All Mitsubishi FX3U-80MR/ES units sourced through Konmask.com are procured from authorized distributors or verified surplus channels with full traceability.
- Inspection: Each unit undergoes visual inspection, label verification, and functional power-on testing prior to shipment.
- Warranty: 12-month warranty against manufacturing defects on genuine units.
- Anti-Counterfeit: Holographic labels and serial number verification available upon request.
- Documentation: Original Mitsubishi hardware manual and wiring diagram provided with every order.
How to Order
- Confirm your required model number (refer to Selection Guide above).
- Add to cart or contact us directly for bulk / project pricing.
- Provide your project application details for compatibility pre-check (optional but recommended).
- Select shipping method — DHL Express, FedEx, or sea freight available.
- Receive order confirmation with tracking number within 1 business day.
📧 Email: support@konmask.com
📞 Phone / WhatsApp: +0086 19859288691
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Replacement & Compatibility FAQ
Q: Can I replace FX3U-80MR/ES with FX5U-80MR/ES directly?
A: Electrically compatible (same I/O count and relay output), but the FX5U uses a different programming environment (GX Works3) and instruction set. Program migration is required. Recommended for new projects or major retrofits.
Q: What is the difference between FX3U-80MR/ES and FX3U-80MT/ES?
A: The MR variant uses relay outputs (suitable for AC/DC loads, longer switching life for infrequent operations). The MT variant uses transistor outputs (faster switching, required for pulse output / servo drive applications).
Q: Is the FX3U-80MR/ES still in production?
A: Mitsubishi Electric has announced the FX3U series as a mature product. It remains available through distribution channels. For new designs, Mitsubishi recommends the FX5U series as the successor platform.
Q: Can Delta DVP80EH00R2 replace FX3U-80MR/ES without reprogramming?
A: No. Delta PLCs use a different instruction set and programming software (ISPSoft / DIADesigner). Full reprogramming is required. Hardware wiring is largely compatible.
Q: Do you supply the FX3U-80MR/ES with a warranty?
A: Yes. All genuine units carry a 12-month warranty. Refurbished units carry a 6-month warranty. Contact us for details.
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