Design of long-distance switch based on power line communication

CHEN Jin-xi， WANG Zhong-fei
（College of Mechanical Engineering， Zhejiang University of Technology， Hangzhou 310012， China）

Abstract： In order to solve the problem of network bus technology used in long-distance switch control must laying the private cable，the power line communication technology was investigated，after analysis of power line communication technology's characteristics. Using the characteristics of power line communication technology that did not need to laying private communication line，the long-distance switch based on power line communication was established，which solved the problem that other bus technology must laying the private cable. The special circuit of STM32 as the system's CPU and the special circuit of ST7540 as the system's modem were designed. The time of each communication cycle was estimated. The results indicate that the system of power line communication can satisfy most applications.
Key words： power line communication； long-distance switch； data transrnission； ST7540