PROFIBUS 现场总线安装指导 PROFIBUS Installation Gu ide User Gu ide Edition (2010年－8 月) 摘 要 本文主要介绍了PROFIBUS 网络中所涉及的硬件以及网络规划和安装中的注意事项，帮助用户正确的安装和使用PROFIBUS 现场总线。 关键词 PROFIBUS，现场总线，通讯，安装，拓扑 Key Words PROFIBUS，field bus，communication，installation，topology IA&DT Service & Support Page 2-37 目 录 PROFIBUS现场总线安装指导 ............................................................................ 1 1 PROFIBUS 概述.............................................................................................. 4 2 PROFIBUS网络硬件....................................................................................... 5 2.1 PROFIBUS接口..............................................................................................................5 2.2 通讯介质.........................................................................................................................6 2.2.1 PROFIBUS 电缆..........................................................................................................6 2.2.2 光纤及接口...................................................................................................................8 2.2.3 PRFOBUS插头..........................................................................................................11 2.2.4 终端电阻....................................................................................................................13 2.2.5 RS485 中继器 ............................................................................................................15 2.2.6 OLM和OBT................................................................................................................17 3 PROFIBUS 网络安装规范 ............................................................................. 21 3.1 网络拓扑的规则................................................................................
