MITSUBISHI FX3U-4DA 4-Channel Analog Output Module | Replacement, Equivalent & Selection Guide
The Mitsubishi FX3U-4DA is a 4-channel analog output special function module designed for the MELSEC FX3U/FX3UC PLC series. It converts digital data from the PLC CPU into analog voltage or current signals, enabling precise control of drives, valves, actuators, and other field devices in industrial automation systems. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make the right sourcing decision.
Technical Specifications
- Model: FX3U-4DA
- Manufacturer: Mitsubishi Electric
- Series: MELSEC FX3U / FX3UC
- Number of Channels: 4 (independent)
- Output Type: Voltage / Current (selectable per channel)
- Voltage Output Range: −10 V to +10 V DC
- Current Output Range: 4 mA to 20 mA DC
- Resolution: 12-bit (voltage), 11-bit (current)
- Conversion Speed: 1 ms/channel (4 ms total)
- Isolation: Optocoupler isolation between CPU and analog circuits
- Power Consumption: 5 VDC, 90 mA (from PLC bus)
- External Power Supply: 24 VDC, 60 mA (required)
- Operating Temperature: 0 °C to 55 °C
- Storage Temperature: −25 °C to 75 °C
- Humidity: 5% to 95% RH (non-condensing)
- Dimensions (W × H × D): 55 × 90 × 87 mm
- Weight: Approx. 200 g
- Applicable PLC: FX3U, FX3UC
- Max. Modules per CPU: Up to 8 special function modules
- Compliance: CE, UL
Compatible Replacement & Equivalent Models
When the FX3U-4DA is unavailable or discontinued, the following models may serve as direct or functional replacements depending on your system configuration:
- FX2N-4DA — Predecessor model for FX2N series; same 4-channel analog output, compatible with FX2N/FX2NC CPUs. Not directly interchangeable with FX3U without adapter.
- FX3U-4DA-ADP — Adapter-type analog output for FX3U; mounts differently but provides equivalent analog output functionality with fewer occupied module slots.
- FX5-4DA — Next-generation replacement for iQ-F (FX5U) series; higher resolution (16-bit), faster conversion, not backward compatible with FX3U without system upgrade.
- Q64DA / Q68DAVN — MELSEC Q-series analog output modules; suitable if migrating to a Q-series platform with higher channel count requirements.
- Third-party equivalents: Certain Weintek, Advantech, and Wago analog output modules support FX3U via MODBUS RTU or CC-Link; consult compatibility documentation before substitution.
Note: Always verify wiring pinout, power supply requirements, and FROM/TO buffer memory addresses before substituting any module.
Why Choose the Original Model
- Native Integration: Plug-and-play with FX3U/FX3UC CPUs — no gateway or protocol conversion required.
- Proven Reliability: Mitsubishi Electric’s FX3U platform has a documented MTBF exceeding 100,000 hours in industrial environments.
- GX Works2/3 Support: Full parameter configuration and diagnostics via Mitsubishi’s official engineering software.
- Dual Output Mode: Voltage and current output selectable per channel — reduces the need for additional signal converters.
- Compact Form Factor: Slim 55 mm width minimizes panel space consumption.
- Warranty & Support: Backed by Mitsubishi Electric’s global service network and spare parts availability.
Typical Applications
- Variable frequency drive (VFD/inverter) speed reference signal output
- Proportional valve and electro-pneumatic positioner control
- Temperature setpoint transmission to PID controllers
- Analog signal generation for test benches and calibration rigs
- Flow control in water treatment and chemical dosing systems
- Tension control in printing, packaging, and converting machinery
- Conveyor speed synchronization in material handling lines
System Compatibility
- Compatible CPUs: FX3U-16M□ / 32M□ / 48M□ / 64M□ / 80M□ / 128M□, FX3UC-□M□
- Not Compatible With: FX1N, FX2N (without adapter), FX5U/FX5UC (different bus architecture)
- Engineering Software: GX Works2 (Ver. 1.492N or later), GX Developer
- Communication: Accessed via FROM/TO instructions or direct buffer memory mapping
- Expansion Bus: Right-side expansion connector of FX3U main unit
- Max Distance from CPU: Determined by total expansion module count (up to 8 special function modules)
Selection Guide
Use the following criteria to determine whether the FX3U-4DA is the right module for your application:
- Step 1 — Confirm CPU Series: Verify your PLC is FX3U or FX3UC. If using FX5U, select FX5-4DA instead.
- Step 2 — Count Required Channels: FX3U-4DA provides 4 channels. For 2 channels, consider FX3U-2DA-ADP (adapter type). For 8 channels, use two FX3U-4DA modules.
- Step 3 — Determine Output Signal Type: Confirm whether your field device requires voltage (0–10 V / ±10 V) or current (4–20 mA). FX3U-4DA supports both per channel.
- Step 4 — Check Module Slot Budget: FX3U supports up to 8 special function modules. Count existing modules before adding FX3U-4DA.
- Step 5 — Verify 24 VDC External Supply: FX3U-4DA requires an external 24 VDC / 60 mA supply. Confirm availability in your panel.
- Step 6 — Resolution Requirement: FX3U-4DA offers 12-bit resolution. If 16-bit is required, consider upgrading to FX5U + FX5-4DA.
Quality Assurance & Sourcing
- Authenticity: All FX3U-4DA units sourced by Konmask.com are genuine Mitsubishi Electric products with traceable supply chain documentation.
- Inspection: Each unit undergoes visual inspection and functional verification prior to shipment.
- Packaging: Original OEM packaging preserved where available; anti-static packaging used for all shipments.
- Lead Time: In-stock units ship within 1–3 business days. Contact us for bulk order lead times.
- Warranty: 12-month warranty against manufacturing defects. Extended warranty available on request.
- Certifications: CE, UL listed. Certificates available upon request for compliance documentation.
How to Order
- SKU: FX3U-4DA
- Online: Add to cart directly on this page.
- Email: Send your BOM or purchase order to support@konmask.com
- Phone/WhatsApp: +0086 19859288691
- Bulk & OEM Inquiries: Contact us for volume pricing, blanket orders, and consignment stock arrangements.
- Export: We support international shipping with commercial invoice, packing list, and certificate of origin documentation.
Replacement & Compatibility FAQ
Q: Can I use FX3U-4DA with an FX2N CPU?
A: No. FX3U-4DA is designed for FX3U/FX3UC CPUs only. For FX2N systems, use the FX2N-4DA.
Q: Is FX3U-4DA compatible with FX5U?
A: No. FX5U uses a different bus architecture. Use FX5-4DA for iQ-F series systems.
Q: Can I mix voltage and current output on the same module?
A: Yes. Each of the 4 channels can be independently configured for voltage or current output via buffer memory settings in GX Works2.
Q: How many FX3U-4DA modules can I connect to one FX3U CPU?
A: Up to 8 special function modules total. You can use multiple FX3U-4DA units within this limit.
Q: Does FX3U-4DA support MODBUS or CC-Link communication?
A: No. It communicates directly with the FX3U CPU via the expansion bus using FROM/TO buffer memory instructions — no fieldbus protocol is required.
Q: What is the difference between FX3U-4DA and FX3U-4DA-ADP?
A: The FX3U-4DA is a standard special function module occupying one module slot. The FX3U-4DA-ADP is an adapter-type module that connects to the left side of the CPU and does not consume a special function module slot, but offers fewer configuration options.
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