FX3U-4AD 4-Channel Analog Input Module 16-Bit | Mitsubishi

The Original New Mitsubishi FX3U-4AD is a 4-channel analog input module from the MELSEC-F FX3U series, designed for high-precision analog signal acquisition in compact machine control and industrial automation systems. Each channel can be independently configured for voltage (-10 to +10 V DC) or current (-20 to +20 mA DC, 4 to 20 mA DC) input, providing flexible integration with a wide range of sensors and transmitters. Featuring 15-bit + sign resolution for voltage and 14-bit + sign resolution for current, the module delivers precise measurement for process monitoring and control applications. High-speed A/D conversion of 500 μs per channel, combined with built-in digital filter and peak value hold functions, ensures responsive and stable data acquisition. The module communicates with the PLC via buffer memory (BFM) and connects through a screw-clamp terminal block. This product has been announced as End of Life by Mitsubishi Electric, with the recommended successor being the FX5-4AD for MELSEC iQ-F series platforms.

Core Engineering Highlights:
4 analog input channels (voltage/current, per-channel configurable) | Voltage: -10 to +10 V DC (15-bit + sign, 0.32 mV resolution) | Current: -20 to +20 mA / 4 to 20 mA (14-bit + sign, 1.25 µA resolution) | 500 µs per channel A/D conversion speed | Photocoupler isolation between analog input area and PLC | Occupies 8 I/O points | 5 V DC 110 mA (internal) + 24 V DC 90 mA (external) power supply | 55 × 90 × 87 mm | 0.2 kg

Key Features:

• Original New Mitsubishi FX3U-4AD module

• 4 analog input channels, each independently configurable as voltage or current input

• Voltage input range: -10 to +10 V DC (input resistance 200 kΩ)

• Current input ranges: -20 to +20 mA DC and 4 to 20 mA DC (input resistance 250 Ω)

• 15-bit + sign resolution for voltage input (0.32 mV)

• 14-bit + sign resolution for current input (1.25 µA)

• High-speed A/D conversion: 500 µs per channel

• Photocoupler insulation between analog input area and PLC

• DC/DC converter insulation between power supply and analog inputs

• Built-in digital filter function for noise suppression

• Built-in peak value hold function for transient signal capture

• BFM data transmission speed up to 4–5 times faster than conventional models

• Occupies 8 I/O points from the PLC allocation

• Screw-clamp terminal connections for secure wiring

• DIN rail mounting (35 mm)

• Compact 55 mm width for space-efficient panel layout

Applications:

• Analog signal acquisition from pressure, flow, and level transmitters

• Temperature and process monitoring in machine automation

• Data acquisition for packaging and material handling systems

• OEM equipment requiring high-precision analog input

• Process control loops with 4–20 mA transmitters

• Voltage signal monitoring from position and force sensors

Technical Specifications:

System Compatibility:

• Compatible with Mitsubishi MELSEC-F FX3U, FX3G, FX3GE, and FX3S series PLCs

• For connection to FX3UC or FX3GC series, an FX2NC-CNV-IF or FX3UC-1PS-5V conversion adapter is required

• Also compatible with FX1N, FX2N, and FX2NC series PLCs (with appropriate conversion adapter for FX2NC)

• Communicates with the PLC via buffer memory (BFM) using FROM/TO instructions

• Configurable via GX Works2 or GX Developer engineering software

Related Products:

• FX5-4AD – Recommended successor for MELSEC iQ-F series (replacement for new designs)

• FX3U-4DA – 4-channel analog output module

• FX3U-4AD-ADP – 4-channel analog input adapter (12-bit, left-side connection)

• FX3U-4AD-PT-ADP – 4-channel Pt100 temperature input adapter

• FX3U-4AD-TC-ADP – 4-channel thermocouple input adapter

• FX3U-4AD-PNK-ADP – 4-channel PNK temperature input adapter

• FX2NC-CNV-IF – Conversion adapter for FX3UC/FX3GC connection

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

• GX Works2 – Engineering software for MELSEC-F series

PLC ERA is an independent industrial automation distributor supplying genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Mitsubishi, MELSEC, and MELSEC-F are trademarks of Mitsubishi Electric Corporation.