The Cellular IoT Modbus RTU is an industrial-grade, highly reliable, and fully programmable Remote Terminal Unit designed for advanced monitoring and control applications. Powered by a 32-bit high-performance MCU and an integrated industrial cellular communication module, it ensures stable, long-term field operation. This RTU provides a rich set of I/O resources, including: 8 Digital Inputs 6 Analog Inputs or PT100 RTD Inputs 4 Relay Outputs 1 Onboard Ambient Sensor Input for temperature & humidity monitoring 1 RS485 Serial Port with support for expanding up to 320 I/O tags via Modbus RTU The device supports remote monitoring and control through SMS, Mobile App, Web Server, Cloud/Internet, system timers, and user-configured logic interlock events, enabling fully automated operation without manual intervention.