一种具有高可靠性的485Hub星型总线  

The new 485 Hub star-bus with the high quality of reliability

作　　者：黄建[1] 周燕[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院电气工程系

出　　处：《微计算机信息》2005年第4期64-65,共2页Control & Automation

摘　　要：通过对485总线的物理隔离,达到减小公共阻抗耦合面积,降低节点间相互干扰程度的目的。在变电站恶劣的电磁环境中,这种485HUB星型总线能防止出现一路节点的静态感应电压过大、瞬态脉冲强压以及信号线差分短接等故障所造成485总线全面瘫痪的情况。In order to minish the coupling of common impedance and reduce the interference among loadings on 485 bus, physical isolation of nodes is a practical method. The new 485 Hub star-bus can avoid some failure to function such as high value of static induced voltage , instant pulse voltage and short circuit between two signal lines under the circumstance of transformer substation, which will make the whole bus out of work if some fault happened on the one of the loadings in traditional 485 bus.

关 键 词：高可靠性 星型 485总线 共阻抗耦合 物理隔离 干扰程度 感应电压 电磁环境 瞬态脉冲 变电站 信号线 节点 

分 类 号：TP368.5[自动化与计算机技术—计算机系统结构] TQ442.14[自动化与计算机技术—计算机科学与技术]