RS485接口浪涌保护器的设计  

Design of Surge Protective Device for RS485 Data Interface

作　　者：刘方 张鹃[2] 张宁 

机构地区：[1]浙江平湖市气象局,浙江平湖314200 [2]江门市气象局,广东江门529030 [3]浙江省嘉善县气象局,浙江嘉善314100

出　　处：《科技创新导报》2013年第10期28-29,31,共3页Science and Technology Innovation Herald

摘　　要：针对系统中RS485接口对过电压极其敏感、耐受电压水平低、容易受到雷电电磁脉冲以及操作过电压等电磁干扰,该文提出了一种RS485接口特定的浪涌防护的方案,结合RS485接口信号的传输特点和理论分析,初步设计出浪涌保护器件,再通过试验测试的方法来确定出最合适的浪涌电路元件参数,以达到不影响信号正常传输的前提下,抑制线路过电压的功能。Based on serial communication in RS485 interface withstand voltage level low, vulnerable to lightning electromagnetic pulse interference, this paper proposed a RS485 interface specific surge protection scheme.FirsUy, combined with RS485 interface device electrical performance and related signal surge design specifications, We design a reasonable surge protection circuit form.Then, We followed by theoretical calculation and comprehensive analysis to determine the parameters of the components to achieve the anticipated effect.

关 键 词：RS485接口 电涌保护器 两级保护 退偶电阻 

分 类 号：TM863[电气工程—高电压与绝缘技术]