Mitsubishi QY18A - Programmable Logic Controller

The Mitsubishi QY18A PLC is a high-performance relay output module designed to control electrical loads with electrical isolation and mechanical durability. Part of the powerful MELSEC-Q Series, it offers 8 integrated digital relay outputs and supports both 24V DC and 240V AC rated load voltages. This wide voltage compatibility allows for seamless integration with a variety of actuators, indicators, and control devices used across industrial environments.

With 16 occupied I/O points, the QY18A fits into compact panels and distributed control systems. It features a space-efficient form factor—27.4 mm width, 98 mm height, and 90 mm depth—while weighing approximately 0.174 kg (corrected from 174 kg). Its screw terminal wiring ensures secure and vibration-resistant connections, which is essential in applications exposed to constant motion or harsh environments. With 0.24 A internal current consumption and a 12–24V DC power supply, the unit remains energy-efficient while delivering high-output performance.

This module is trusted by engineers for its robust construction, long relay life, and ability to safely handle both resistive and inductive loads. It integrates smoothly with other modules in the MELSEC-Q Series and is fully supported by Mitsubishi’s GX Developer and GX Works programming environments. The Mitsubishi QY18A PLC is commonly deployed in Indian industries to control high-voltage devices like solenoid valves, tower lamps, contactors, and relays. It is especially useful in legacy systems or hybrid panels where both AC and DC load switching is required.

Its relay output type provides safe electrical isolation between control logic and output devices, making it a preferred choice for applications involving electrical noise or surge-sensitive equipment. Engineers rely on it for long-term durability and consistent switching, especially in bottling plants, conveyor systems, and utility panels. Students and junior engineers benefit from the clarity of its screw terminals and visual status indicators, which simplify diagnostics and maintenance.

If you're looking to expand your automation system with a reliable relay output module, the Mitsubishi QY18A offers the versatility, isolation, and performance needed for robust industrial control.