Mitsubishi FX5-8AD

Mitsubishi FX5-8AD – High-Performance Analog Input Module for MELSEC iQ-F Series PLCs

The Mitsubishi FX5-8AD is a compact and highly reliable analog input module designed specifically for the MELSEC iQ-F Series PLCs. Engineered to meet the growing demands of modern industrial automation, this module provides advanced analog signal processing capabilities in a streamlined form. With eight analog input channels, it is ideal for applications requiring precise monitoring of analog variables such as temperature, pressure, flow rate, or level, making it a key component in process control, machine automation, and data acquisition systems.

The FX5-8AD supports a variety of analog input signal types, including voltage signals ranging from 0–10V and current signals from 4–20mA. Each of the eight input channels is independently configurable, offering maximum flexibility for integrating different types of sensors and transmitters within a single module. This feature allows system designers to build cost-effective, mixed-signal automation solutions without needing separate modules for each signal type.

With a resolution of 12 bits, the FX5-8AD delivers accurate analog-to-digital (A/D) conversion, providing 1 in 4,000 steps of resolution for smooth and detailed signal interpretation. This is crucial for industries where even minor signal variations must be detected and acted upon. For example, in chemical dosing, HVAC systems, and precision machinery, such high resolution ensures better control stability and enhanced product quality.

The FX5-8AD integrates seamlessly into the Mitsubishi MELSEC iQ-F platform, offering plug-and-play connectivity with FX5U and FX5UC CPUs. Installation is simple—the module is attached directly to the side of the base unit using a secure expansion connector. This eliminates the need for complex wiring or backplane mounting, reducing installation time and simplifying system expansion. The compact form factor also allows users to maintain a small control panel footprint, which is especially valuable in OEM equipment and space-constrained environments.

Configuration and monitoring of the FX5-8AD are handled using GX Works3, Mitsubishi’s powerful PLC programming and system configuration software. Through this platform, users can assign channel-specific settings, define input ranges, and scale raw analog values into meaningful engineering units (e.g., °C, bar, L/min). Diagnostic tools within GX Works3 also allow users to view real-time input values, status flags, and error conditions, making system setup and maintenance faster and more transparent.

In terms of safety and robustness, the FX5-8AD is built to withstand the rigors of industrial environments. It includes overvoltage protection and isolation between channels and the PLC, safeguarding both the module and the CPU from electrical disturbances or wiring errors. Operating in ambient temperatures from 0°C to 55°C, and meeting international standards for EMC and noise immunity, the module is suitable for deployment in a wide variety of industrial sectors around the world.

In applications where performance degradation occurs—such as signal drift, channel failure, or communication errors—technicians can perform diagnostics via software, and in many cases, the module can be repaired rather than replaced. Common repair tasks include replacing damaged A/D converter components, restoring PCB tracks, or recalibrating channels to restore signal accuracy. These repair options can significantly reduce maintenance costs and extend the operational life of the system.

In conclusion, the Mitsubishi FX5-8AD analog input module offers an ideal combination of precision, flexibility, and ease of integration for analog signal acquisition in MELSEC iQ-F PLC systems. With eight configurable channels, high-resolution data processing, and seamless software support, it empowers engineers and integrators to design efficient and scalable automation solutions. Whether used in standalone equipment or large-scale factory systems, the FX5-8AD stands out as a dependable and efficient tool for real-world industrial control challenges.

Q61P

1769-IQ16

1762-IQ8

1764-LSP