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西门子与AB最主要的差别在于AB所使用的网络类型都是开放的网络，可以与其他公司的产品做到很好的兼容，AB控制层网络采用ControlN… 阅读全文 0 人评论

ewinsun 漏电保护器的工作原理（附图说明） 2009/7/3 9:51:02

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7 Type7 WorldFIP现场总线 1987年成立的WorldFIP协会制定并大力推广Type7 WorldFIP现场总线。WorldFIP协议是EN50170欧洲标准的第三部分… 阅读全文 0 人评论

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