Abstract: To adopt TMS4701A256 of TI Company as the Data Acquisition controller and gateway，embodying the application of CAN bus in the electric leakage fire warning system. Also, giving an elaborate recommendation of the current application background of the system and the hardware and software designing of the system.

Key words: CAN Bus, TMS4701A256, Electric Leakage, Cascading Protection

摘要： 采用TI公司的TMS4701A256做数据采集控制器并且兼做网关，给出基于CAN总线的级联漏电火灾报警监控系统的设计思想，并对当前的应用背景及该系统的硬件和软件设计做了详细介绍。

关键词: CAN总线, TMS4701A256, 漏电, 级联保护