IO-Link masters for factory automation are a category of devices rather than a specific brand, designed to enhance industrial communication and control. These devices are produced by various manufacturers worldwide, including prominent companies like Siemens (Germany), Balluff (Germany), and IFM (Germany). IO-Link masters serve the factory automation industry, enabling seamless connectivity between sensors, actuators, and control systems in smart manufacturing environments. Key products include modular IO-Link masters, compact hubs, and gateway solutions, which support real-time data exchange and simplify wiring in industrial setups. These components are critical for Industry 4.0 applications, improving efficiency and flexibility in automated production lines.