Mitsubishi QX81-S2 - Programmable Logic Controller

The Mitsubishi QX81-S2 PLC offers 32 high-speed digital inputs configured with minus common DC input logic, ideal for interfacing with industrial field devices such as limit switches, proximity sensors, and contact relays. Operating at a stable 24V DC input voltage, this module ensures fast and noise-immune signal detection, making it suitable for dynamic environments like packaging, robotics, and assembly systems. The module is a part of the renowned MELSEC-Q Series, known for its reliability, modular architecture, and wide compatibility with Mitsubishi automation systems.

Its design features a space-saving structure with a width of 27.4 mm, depth of 90 mm, and height of 98 mm, enabling dense cabinet configurations without compromising airflow or accessibility. Weighing only 135 grams, the QX81-S2 supports connector-type wiring for simplified and efficient panel integration. The internal power draw is just 0.075 A, ensuring low energy consumption while maintaining high input responsiveness. Built for endurance, this module performs reliably in demanding industrial environments with rapid signal response, fault diagnostics, and real-time status feedback.

Whether you're expanding an existing Q Series setup or building a new automation line, the Mitsubishi QX81-S2 provides the precision, durability, and scalability required for modern control systems. Trusted by automation professionals globally, this PLC input unit meets stringent industrial quality standards and contributes to error-free machine control.

The Mitsubishi QX81-S2 PLC is widely used in manufacturing plants, machine tool operations, and high-speed automation lines where rapid digital input detection is crucial. It plays a key role in receiving signals from proximity sensors, pushbuttons, photoelectric sensors, and safety switches to trigger programmable actions or interlocks.

Maintenance teams appreciate the connector wiring format for quick module replacement during plant downtimes. With its compact size and 32-channel input density, the QX81-S2 makes it easy to retrofit into legacy panels or embed into modern smart control enclosures. It supports complex tasks such as input conditioning, device-level fault detection, and signal diagnostics without the need for external converters or filters.

Engineers and technicians rely on the QX81-S2 to streamline industrial automation workflows, especially in conveyor automation, machine interlocks, and error-checking systems. Whether you’re handling batch processes or continuous production, this Mitsubishi PLC model enables fast, stable, and consistent digital signal management that supports long-term system performance.