Mitsubishi FX2N-4DA MELSEC-F Analog Output Module 4 Channels

Mitsubishi Electric FX2N-4DA is a 4‑channel analog output special function block for the MELSEC‑F FX series programmable logic controller system. It converts digital control data from the PLC into precise voltage or current analog output signals, independently configurable for each channel. This module is discontinued and available as a spare part for maintaining existing FX2N‑based automation systems. For new designs, Mitsubishi recommends migrating to the FX3U‑4DA as a functionally upgraded replacement.

Applications:

• Process control requiring variable voltage/current output (valve positioning, actuator control)

• Industrial monitoring and regulation systems (flow, pressure, level control)

• OEM equipment with legacy FX2N/FX3U PLC platforms

• Spare part replacement for existing MELSEC‑F FX series installations

Product Status:
This product has been discontinued. It is available for purchase only as a spare part for maintaining legacy systems. Mitsubishi Electric accepts product repairs for seven years after production of the product is discontinued. For new installations, use FX3U‑4DA (recommended successor) or FX5U‑4DA depending on the PLC platform.

Core Specifications:

• Number of analog outputs: 4 channels

• Output signal types (per‑channel selectable):

  • Voltage: –10 to +10 V DC (external load resistance: 2 kΩ to 1 MΩ)

  • Current: 0 to 20 mA or 4 to 20 mA DC (external load resistance: ≤ 500 Ω)

• Resolution: 12‑bit

  • Voltage resolution: 5 mV (10 V × 1/2000)

  • Current resolution: 20 µA (20 mA × 1/1000)

• Digital input range:

  • Voltage output (–10 to +10 V): –2000 to +2000

  • Current output (0 to 20 mA): 0 to 1000

  • Current output (4 to 20 mA): 0 to 1000

• Overall accuracy: ±1.0% (±200 mV for 20 V full scale, voltage; ±200 µA for 20 mA full scale, current)

• Conversion speed: 2.1 ms for all 4 channels (number of selected channels does not affect this value)

• Occupied I/O points: 8 points (taken from either the input or output points of the PLC)

• Insulation: Photocoupler isolation between analog output area and PLC; DC/DC converter insulation for power supply; no channel‑to‑channel isolation

• Power supply: 24 V DC (external)

• Power consumption: 30 mA (from PLC 5 V DC internal power supply)

• Buffer memory (BFM): 32 memory locations for mode settings, output data storage, offset/gain adjustment

• Dimensions (H × W × D): 90 mm × 55 mm × 87 mm

• Weight: approx. 0.26 kg (0.56 lbs)

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –20 °C … 70 °C

Compatibility:

• MELSEC‑F FX0N, FX1N, FX2N, FX2NC, FX3U series PLCs

• Connects directly to the right side of the FX2N/FX3U main unit or extension units

• Data exchange via buffer memory (BFM) using FROM/TO instructions

Buffer Memory (BFM) Allocation:

• BFM #0: Output mode selection per channel (voltage or current)

• BFM #1 – #4: Analog output data for channels 1 through 4

• BFM #5: Output data in STOP mode setting

• Offset and gain adjustment BFMs: User‑configurable calibration

Output Modes (BFM #0):

• 0: –10 to +10 V → digital value –2000 to +2000

• 1: 4 mA to 20 mA → digital value 0 to +1000

• 2: 0 mA to 20 mA → digital value 0 to +1000

Functional Features:

• Per‑channel independent output mode selection (voltage or current) via BFM settings

• Offset and gain calibration using dedicated BFMs for process‑specific fine‑tuning

• Photocoupler isolation for digital/analog circuits enhances signal integrity and reduces interference

System Integration:

• This special function block belongs to the Mitsubishi Electric MELSEC‑F FX series.

• Connects directly to the FX2N/FX3U main unit or extension unit via the expansion connector.

• Occupies 8 I/O points from the PLC allocation.

• Programming and configuration performed using GX Works2 or GX Developer software via FROM/TO instructions.

• For detailed installation, wiring, and BFM configuration, refer to the FX2N‑4DA User's Manual.

Recommended Replacement:

• FX3U‑4DA: 4‑channel analog output block for FX3U series. Provides 16‑bit resolution (voltage: 0.32 mV, current: 0.63 µA) with digital ranges –32,000 to +32,000, offering up to 16× higher voltage resolution and 32× higher current resolution compared to FX2N‑4DA. Output modes: 0: –10 to +10 V (–32,000 to +32,000); 1: –10 to +10 V (–10,000 to +10,000); 2: 0–20 mA (0–32,000); 3: 4–20 mA (0–32,000). BFM #0–#4 usage remains compatible.

• FX5‑4DA‑ADP: 4‑channel analog output adapter for MELSEC iQ‑F (FX5U, FX5UC) series (12‑bit, voltage/current) for new system designs.

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information.