Mitsubishi FX2N-2AD 2-Channel Analog Input Module – MELSEC FX2N Series
When an analog signal from a pressure transmitter, thermocouple, or flow meter cannot be accurately read by the PLC, the entire production line loses its feedback loop. Setpoints drift, alarms fail to trigger, and process quality degrades silently — often until a costly shutdown or product defect forces the issue. The Mitsubishi FX2N-2AD eliminates this risk by providing a dedicated, high-precision analog-to-digital conversion interface directly on the FX2N backplane, ensuring every analog signal is captured with 12-bit resolution and delivered to the CPU without noise or data loss.
Within the MELSEC FX2N expansion lineup, the FX2N-2AD occupies the entry-level analog input position — purpose-built for applications requiring two independent analog channels with selectable voltage or current input ranges. Its compact DIN-rail form factor and direct bus connection to the FX2N/FX2NC CPU make it the most widely deployed analog input module in Mitsubishi’s compact PLC ecosystem, trusted by OEMs and system integrators across Asia, Europe, and the Americas for over two decades.
Technical Specifications
- Model: FX2N-2AD
- Manufacturer: Mitsubishi Electric (MELSEC)
- Series: MELSEC FX2N Expansion Module
- Number of Analog Input Channels: 2 channels (CH1, CH2)
- Input Signal Type: Voltage or Current (selectable per channel)
- Voltage Input Range: DC 0–10 V / DC –10 to +10 V
- Current Input Range: DC 4–20 mA
- Resolution: 12-bit (0–4095 digital output)
- Conversion Speed: 2.5 ms/channel (5 ms total for 2 channels)
- Accuracy: ±1% of full scale (at 25°C ambient)
- Isolation: Optocoupler isolation between analog input and PLC bus
- Power Consumption: 5 VDC, 30 mA (from FX2N main unit)
- Operating Temperature: 0°C to 55°C
- Storage Temperature: –20°C to 70°C
- Relative Humidity: 35% to 85% RH (non-condensing)
- Weight: Approx. 200 g
- Compatible PLCs: FX2N, FX2NC (with adapter), FX3U (with adapter)
- Mounting: Direct expansion bus connection or DIN rail
- Certifications: CE, UL (refer to Mitsubishi Electric official datasheet)
Key Features & Benefits
- Dual Independent Channels: CH1 and CH2 are independently configurable for voltage or current input, eliminating the need for signal converters in mixed-signal environments.
- 12-Bit High Resolution: Provides 4096 discrete digital levels, enabling fine-grained process control for pressure, temperature, flow, and position feedback.
- Direct Bus Expansion: Connects directly to the FX2N CPU expansion port — no additional power supply or interface card required, reducing panel space and wiring complexity.
- Optocoupler Isolation: Protects the PLC CPU from ground loops and electrical noise common in industrial environments.
- Simple FROM/TO Instruction Programming: Configured and read via standard Mitsubishi FROM/TO buffer memory instructions in GX Developer or GX Works2, minimizing engineering time.
- Compact Form Factor: Slim module design fits within tight control panel layouts alongside other FX2N expansion units.
- Long-Term Availability: Konmask.com maintains stock of both new and tested-refurbished units to support legacy FX2N systems still in active production.
Industry & Equipment Applications
- Food & Beverage Processing: Monitoring tank pressure and liquid flow rates in filling and mixing lines controlled by FX2N PLCs.
- HVAC & Building Automation: Reading 4–20 mA signals from temperature and humidity transmitters for zone control systems.
- Plastic Injection Molding: Capturing barrel temperature and hydraulic pressure feedback for closed-loop process control.
- Water Treatment Plants: Interfacing with pH sensors, turbidity meters, and flow transmitters on compact FX2N-based SCADA panels.
- Textile Machinery: Tension and speed control via analog feedback from dancer rollers and tachometers.
- Packaging Equipment: Integrating load cell and pressure sensor signals into FX2N-driven servo and pneumatic control loops.
- OEM Machine Builders: Embedding analog measurement capability into compact, cost-sensitive machine designs using the FX2N platform.
System Integration & Compatible Parts
The FX2N-2AD is designed to work within the broader MELSEC FX2N ecosystem. Typical bill of materials for a complete analog input system includes:
- FX2N-32MR / FX2N-48MR / FX2N-64MR — FX2N CPU main units
- FX2N-4AD — 4-channel analog input module (upgrade path)
- FX2N-2DA — 2-channel analog output module (paired for closed-loop control)
- FX2N-4AD-PT — PT100 temperature input module
- FX2N-4AD-TC — Thermocouple input module
- FX2N-CNV-BD — Expansion bus adapter for FX2NC compatibility
- FX2N-8EX / FX2N-8EYR — Digital I/O expansion modules
- SC-09 / USB-SC09-FX — Programming cables for GX Developer / GX Works2
Our Quality Assurance Process
Every FX2N-2AD unit shipped from Konmask.com undergoes a structured inspection protocol before dispatch:
- Visual Inspection: Housing integrity, connector condition, label legibility, and absence of physical damage or corrosion.
- Functional Power-On Test: Module is powered via a compatible FX2N main unit to verify bus communication and LED status indicators.
- Analog Channel Verification: Both CH1 and CH2 are tested with calibrated voltage and current signal sources to confirm conversion accuracy within specification.
- Firmware & Version Check: Hardware revision is documented and disclosed to the buyer prior to shipment.
- Packaging: Anti-static bag + foam-padded carton with desiccant for international shipping.
New units are sourced from authorized Mitsubishi Electric distributors or factory-sealed stock. Refurbished units are clearly labeled and priced accordingly.
How to Order
- Click “Add to Cart” or use the “Request a Quote” button for bulk or project-based pricing.
- For urgent requirements, email [email protected] with your quantity, delivery location, and required lead time.
- Our team responds to all B2B inquiries within 24 hours (business days, UTC+8).
- We support T/T bank transfer, PayPal, and trade assurance payment terms for international orders.
- Export documentation (commercial invoice, packing list, CO) provided for all international shipments.
Why Choose Konmask.com?
- Specialist Inventory: We focus exclusively on industrial automation components — Mitsubishi, Siemens, Omron, Schneider, and more — with deep stock of legacy and current-generation parts.
- Verified Sourcing: All units are traceable to authorized distribution channels or factory stock. No counterfeit risk.
- Global Export Experience: We ship to 60+ countries with full export documentation and DDP/DAP Incoterms support.
- Technical Pre-Sales Support: Our engineers can advise on compatibility, wiring, and programming before you commit to a purchase.
- Competitive Lead Times: In-stock items ship within 1–3 business days. Hard-to-find parts sourced within 5–15 business days.
Frequently Asked Questions
Q: Is the FX2N-2AD compatible with the FX3U PLC?
A: Direct bus connection is not supported. However, with the FX2N-CNV-BD adapter, the FX2N-2AD can be used with FX2NC-series CPUs. For FX3U, Mitsubishi recommends the FX3U-4AD or FX3U-2AD-ADP modules natively.
Q: What is the difference between FX2N-2AD and FX2N-4AD?
A: The FX2N-2AD provides 2 analog input channels; the FX2N-4AD provides 4 channels. Both offer 12-bit resolution and voltage/current input options. Choose FX2N-4AD when more than 2 analog signals need to be monitored simultaneously.
Q: Can I use both voltage and current input on the same module simultaneously?
A: Yes. CH1 and CH2 are independently configurable — one channel can be set to voltage input while the other is set to current input, using the internal jumper settings on the module.
Q: Do you provide the wiring diagram and programming example?
A: Yes. Upon order confirmation, we provide the official Mitsubishi FX2N-2AD hardware manual PDF and a sample GX Works2 FROM/TO ladder program on request.
Q: What is the warranty on your FX2N-2AD units?
A: New units carry a 12-month warranty. Tested-refurbished units carry a 6-month warranty. Warranty covers functional defects under normal operating conditions.
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