Remote I/O modules are essential components in industrial automation, enabling the expansion of control systems by providing remote input and output capabilities. These modules facilitate the connection of sensors, actuators, and other field devices to a central controller over various communication protocols (e.g., Ethernet/IP, PROFINET, Modbus). Key features include high-speed data transmission, rugged design for harsh environments, and modular configurations for scalability. Common products in this category include digital I/O modules (e.g., 16-channel digital input modules), analog I/O modules (e.g., 4-20mA analog output modules), and specialty modules (e.g., thermocouple input modules). They are widely used in PLC systems, process control, and machine automation.