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首页> 外文期刊>Automation World >Discovering Safety Networks: Replacing traditional hard-wired safety systems with safety programmable controllers running on safe versions of open-architecture fieldbus networks can pay big dividends for manufacturers
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Discovering Safety Networks: Replacing traditional hard-wired safety systems with safety programmable controllers running on safe versions of open-architecture fieldbus networks can pay big dividends for manufacturers

机译：发现安全网络：用在开放式体系结构现场总线网络的安全版本上运行的安全可编程控制器代替传统的硬连线安全系统可以为制造商带来丰厚的回报

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As a controls process engineer at Kuka Flexible Production Systems, an automotive system integrator based in Sterling Heights, Mich., Brown, was well aware of the way that factory safety systems bad traditionally been built with hard wiring and safety relays. It was an approach mandated by long-standing North American safety standards. So it was a surprise for Brown in 2003 when he learned through a vendor that the rules of the game recently had changed. Revisions made in 2002 to NFPA 79-the National Fire Protection Association standard covering electrical equipment in industrial machinery-had legitimized use of certain "software and firmware-based controllers" as an alternative to hard-wired safety solutions. The change opened the door for use of certified safety programmable logic controllers (PLCs) and associated safety fieldbus networks. Both technologies had been deployed for several years in Europe, but at the time, were little used and largely unknown in the United States.
机译：作为位于美国密歇根州斯特林高地的汽车系统集成商Kuka Flexible Production Systems的控制过程工程师，他深知传统上使用硬接线和安全继电器制造工厂安全系统的方法。这是北美长期安全标准所要求的一种方法。因此，当布朗在2003年通过一家供应商了解到游戏规则最近发生了变化时，这真是令人惊讶。 2002年对NFPA 79（美国国家防火协会标准，涉及工业机械中的电气设备）进行了修订，已合法使用某些“基于软件和固件的控制器”作为硬连线安全解决方案的替代方案。这一变化为使用经过认证的安全可编程逻辑控制器（PLC）和相关的安全现场总线网络打开了大门。两种技术在欧洲已经部署了好几年，但在当时很少使用，在美国却鲜为人知。

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