With the demand for high quality of electric energy is increasing ， as the most immediate part to the consumer ， distribution network ’ s efficient and reliable operation is very important as the result ， new distribution automation equipment with high performance is inevitable prime machine system ， as data collection and processing subsystem of dms ， provides communication of kinds of information between control center and rtus it ’ s reliability ， real ? time abilitv and stability affect the scada system directly to solve the disadvantage of the existing system ， whose channels are dependent ， a new proj ect of single board system is brought forward and its hardware and software are designed with high performance chip of communication ， independence of channels is realized basic function of system is realized ， and faster reposition and expansibility of the single chip is fully applied 配电自动化通信前置机作为dms主站系统的数据采集与处理子系统，提供监控中心与远方rtu之间各种可能信息的交换功能，其可靠性，实时性和稳定性直接影响scada系统的运行质量。本课题针对现有前置机各通信信道之间不相互独立、稳定性低的固有问题，提出一种新式单板前置机系统，并对其进行了软硬件设计，选用高性能专用通信处理芯片，实现各信道独立，并在实现前置机基本功能的基础上，充分发挥单片机相对于工控机的快速复位功能以及更好的可扩展性，实现了一个可靠、稳定、灵活的前置机系统。
