Mitsubishi QX40H - Programmable Logic Controller

The Mitsubishi QX40H PLC is engineered to handle high-speed 24 V DC input signals with exceptional accuracy and low latency. It features 16 integrated digital inputs with DC current type, optimized for detecting high-frequency transitions in modern industrial systems. This module is part of the robust MELSEC-Q Series, offering seamless integration with existing Mitsubishi PLC architectures for synchronized, time-critical control.

Compact in design, the QX40H measures just 27.4 mm in width, 98 mm in height, and 90 mm in depth, with a sturdy build weighing only 0.16 kg. It uses screw-type terminals for secure wiring and stable connections, even in vibration-intensive environments. With an internal current consumption of 0.08 A and rated input voltage of 24 VDC, this module delivers power-efficient performance while occupying only 16 I/O points on the PLC. It’s built for demanding industrial conditions and is compatible with programming tools like GX Developer and GX Works2.

Trusted by engineers for its fast signal response and robust construction, the QX40H enhances machine reliability and operational speed. It is ideal for applications involving sensor arrays, rotary encoders, and fast-moving machinery. With support from Mitsubishi Electric’s global ecosystem, this module is backed by proven engineering excellence, detailed documentation, and long-term reliability.

The Mitsubishi QX40H PLC is designed for high-speed input acquisition in automation systems where signal speed and stability directly impact performance. It is commonly used in applications involving rotary encoders, proximity sensors, and fast detection switches in industries such as packaging, robotics, and electronics manufacturing.

For instance, in high-speed labeling or filling machines, this module ensures real-time feedback from optical or magnetic sensors, allowing the PLC to trigger downstream actuators with microsecond-level responsiveness. Its screw terminals offer easy and secure wiring in panels where vibration or frequent service is expected, making it suitable for OEMs and maintenance teams alike. With a compact footprint and low current draw, it integrates easily into both new and legacy MELSEC-Q systems.

Whether you are scaling your automation infrastructure or upgrading to faster, more precise inputs, the QX40H PLC delivers trusted Mitsubishi performance for high-speed signal handling. It is an ideal choice for engineers building the next generation of responsive, real-time industrial control systems.