Mitsubishi FX2N-2DA MELSEC-F 2-Channel 12‑Bit Analog Output Module

The Mitsubishi FX2N-2DA is a discontinued analog output special function block for the MELSEC‑F FX series PLC system. It converts digital values from the PLC into two channels of voltage or current analog signals for precise control of field devices such as inverters, valves, and actuators. The module is intended for maintenance and spare part support of existing FX2N-based automation systems. For new designs, migration to the FX3U‑4DA (upgraded replacement) or the FX5U series with FX5‑4DA is recommended.

Applications:

• Speed reference control for variable frequency drives (VFDs)

• Positioning of proportional valves and electric actuators

• Process control analog signal generation (0‑10 V / 4‑20 mA)

• Legacy system spare part replacement for FX2N PLC configurations

Core Specifications:

• Number of analog outputs: 2 (independent channels, configurable per channel via wiring)

• Output modes (selectable by wiring method):

  • Voltage output: 0 to 10 V DC, 0 to 5 V DC (load resistance 1 kΩ to 1 MΩ)

  • Current output: 4 to 20 mA DC (load resistance ≤ 400 Ω)

• Resolution: 12‑bit (2.5 mV for 0‑10 V range; 4 µA for 4‑20 mA range)

• Digital input range at factory shipment: 0 to 4000 corresponds to 0‑10 V (offset/gain adjustable for other ranges)

• D/A conversion speed: ≤ 2.1 ms (all channels together)

• Occupied I/O points: 8 points (counted from either input or output allocation)

• Data transfer method: FROM/TO instructions via buffer memory (BFM)

Advanced Specifications:

• Digital circuit power supply: 5 V DC, 30 mA (supplied from main unit)

• Analog circuit power supply: 24 V DC ±10%, 85 mA (supplied from main unit)

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

• Functions: offset/gain adjustment per channel, optional smoothing capacitor (0.1‑0.47 µF, 25 V) for noisy voltage output environments

• Connection type: Screw terminal block (removable)

• Protection rating: IP10 (for use in a protected control cabinet)

• Mounting: DIN rail (35 mm)

• Dimensions (W × H × D): 43 mm × 90 mm × 87 mm

• Weight: approx. 0.2 kg (0.44 lbs)

• Operating temperature: 0 °C … 55 °C

Buffer Memory (BFM) Allocation:

• BFM #0: Output mode selection (channel‑independent)

• BFM #1 – #2: Digital value output data for channels 1 and 2

• BFM #9 – #10: Offset data per channel

• BFM #11 – #12: Gain data per channel

Output Modes (BFM #0):

• 0: Voltage output (–10,000 to +10,000 when using –10 to +10 V, not directly supported by FX2N‑2DA; refer to table)

• 1: Voltage output (0 to 10 V) or current output (4‑20 mA) depending on wiring

• 2: Current output (0‑20 mA) or voltage output (0‑5 V)

Compatibility information:

• Compatible with FX0N, FX1N, FX2N, FX2NC, FX3U, FX3UC series PLCs

• Connect directly to the right side of the main unit or other extension units.

• For connection to FX3UC or FX3GC, an FX2NC‑CNV‑IF or FX3UC‑1PS‑5V adapter is required.

• Up to 4 FX2N‑2DA units can be connected to an FX2N system (up to 8 depending on I/O configuration).

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

Product Status:
This product is discontinued. Available for maintenance and spare part support only. Mitsubishi Electric accepts product repairs for seven years after production discontinuation. For new installations or legacy system upgrades, use the recommended successors listed below.

Recommended Replacement:

• FX3U‑4DA: 4‑channel analog output block for FX3U series. Provides 16‑bit resolution for voltage and 15‑bit resolution for current, offering significantly higher resolution than FX2N‑2DA. Output ranges include –10 to +10 V and 4‑20 mA. Digital ranges are –32,000 to +32,000 for –10 to +10 V, and 0–32,000 for 0‑20 mA / 4‑20 mA. Buffer memory addresses differ from FX2N‑2DA; migrate programs accordingly. Compatible with FX3G, FX3GE, FX3GC, FX3U, FX3UC series PLCs.

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

Related Products:

• FX2N‑4DA – 4‑channel analog output module (higher channel count for FX2N series)

• FX2N‑2AD – 2‑channel analog input module

• FX2N‑4AD – 4‑channel analog input module

• FX3U‑4DA – Recommended replacement for new installations

• FX2NC‑CNV‑IF – Conversion adapter for FX2NC/FX3UC CPU connection

• FX3UC‑1PS‑5V – Power supply adapter for FX3UC CPU connection