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1. 发明公开

EP1688811A2 Networks for process control 审中-公开
标题翻译： NetzwerkefürProzesssteuerung
公开(公告)号：EP1688811A2
公开(公告)日：2006-08-09
申请号：EP06250640.7
申请日：2006-02-07
申请人： Relcom, Inc.
发明人： Graube, Maris
IPC分类号： G05B19/418
CPC分类号： G05B19/41855 , G05B2219/31157 , G05B2219/31244 , Y02P90/185
摘要： A petrochemical process control system having a hub network for connecting a plurality of remotely located devices including sensors and actuators in the field to a control room computer. The power for operating the remote device is brought directly to the devices and not sent over a trunk cable from the control room computer. A redundant spur cable connects the control room computer to said hub. All of the spur cables between the hub and the field devices have current limiting resistors which prevent a failure or shorting of a device or spur cable devices from affecting continued operation of the other devices.
摘要翻译：一种石油化工过程控制系统，其具有用于将包括现场的传感器和致动器的多个远程定位的设备连接到控制室计算机的集线器网络。用于操作远程设备的电源直接连接到设备，而不是通过中继电缆从控制室计算机发送。冗余的辅助电缆将控制室计算机连接到所述集线器。集线器和现场设备之间的所有辅助电缆都具有限流电阻，防止设备或辅助电缆设备的故障或短路，影响其他设备的继续运行。

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