HSD22-U data concentrator is a new generation of centralized meter reading terminal (DCU) developed and designed with reference to domestic and foreign advanced technical standards and combined with the actual needs of power users. The DCU uses 32-bit ARM9 and LINUX operating systems, with high-performance software and hardware platforms. The DCU uses a dedicated energy metering chip to ensure the accuracy and speed of data processing. The HSD22-U collector detects and analyzes the working conditions of the power grid and electric energy meters in real time, and actively reports abnormalities that can reduce the loss of power users to a minimum. The HSD22-U collector can be widely used in terminal meter reading, assessment and measurement, low-voltage centralized meter reading and other occasions.