The distribution automation terminal is the execution unit of the distribution automation system and an important part of the distribution automation system. Data Transfer Unit (DTU), also known as a "data transmission unit, concentrator, converter, or repeater," typically functions as a router or gateway. It supports multiple industrial protocols (e., usually routers, gateways, support a variety of industrial protocols such as mqttiec101modbus and other protocol wired input, Then use wired or wireless transmission to. FTU is a kind of intelligent terminal equipment for distribution network automation, which is mainly used in feeder automation system. DTUs are typically installed at conventional substations, outdoor small-scale substations.