说明：  一种带供电功能的设备端串行双总线通信系统，它具有通讯设备容量大，通讯速率高，设计简单，布线方便，抗干扰能力强的特点，可以总线供电.
(A device with the function of power supply terminal serial double bus communication system, it has a large capacity of communication equipment, communication rate is high, the design is simple, convenient wiring, the characteristics of strong anti-interference ability, can bus power supply. )