Remote I/O Modbus RTU/TCP devices are essential components in industrial automation, enabling remote monitoring and control of sensors, actuators, and other field devices. These modules support the Modbus communication protocol (RTU serial or TCP/IP), providing reliable data transmission in harsh industrial environments. Key products in this category include: Modbus RTU I/O modules for digital/analog signal conversion, Modbus TCP Ethernet I/O gateways, ruggedized remote terminal units (RTUs), and protocol converters. Typical features include galvanic isolation, wide operating temperature ranges, DIN-rail mounting, and configurable I/O channels (DI, DO, AI, AO). These solutions are widely used in SCADA systems, PLC networks, and equipment monitoring applications where distributed I/O access is required.