Dual current-source digital-input circuit for an industrial automation system
    1.
    发明申请
    Dual current-source digital-input circuit for an industrial automation system 有权
    用于工业自动化系统的双电流源数字输入电路

    公开(公告)号:US20050139791A1

    公开(公告)日:2005-06-30

    申请号:US10746487

    申请日:2003-12-29

    CPC分类号: H04B10/801 H03K17/7955

    摘要: An interface circuit for use between an input circuit and an industrial automation system is disclosed. The industrial automation system includes an opto-coupler capable of being operably connected to the interface circuit. The interface circuit includes a first and second terminal, each terminal capable of being operably connected to the opto-coupler. A first current-source is operably connected to the first terminal and a second current-source is operably connected to the second terminal. A reference voltage is operably connected to the first current-source and the second current-source wherein the first and second current-source cooperate to provide a total input current in accordance with the operating characteristics of the industrial automation circuit.

    摘要翻译: 公开了一种用于输入电路和工业自动化系统之间的接口电路。 工业自动化系统包括能够可操作地连接到接口电路的光耦合器。 接口电路包括第一和第二端子,每个端子能够可操作地连接到光耦合器。 第一电流源可操作地连接到第一端子,并且第二电流源可操作地连接到第二端子。 参考电压可操作地连接到第一电流源和第二电流源,其中第一和第二电流源协作以根据工业自动化电路的操作特性提供总输入电流。

    Software configurable dual cable redundant Ethernet or bus configuration
    3.
    发明申请
    Software configurable dual cable redundant Ethernet or bus configuration 审中-公开
    软件可配置双电缆冗余以太网或总线配置

    公开(公告)号:US20050091394A1

    公开(公告)日:2005-04-28

    申请号:US10694462

    申请日:2003-10-27

    摘要: A system having a redundant topology for communication between one or more devices and a central hub. The system comprises a central hub or switch and one or more end nodes where each end node includes a first port and a second port. A first active cable is connected to the first port in each end node and a first port in the hub and, a second active cable is connected to the second port in each end node and a second port in the hub. Messages are transmitted across both the first and second cables to the first and second ports of the end nodes. The end node performs an integrity check on the messages received over the first and second cables and utilizes the first one to pass the check. Thus, if one cable malfunctions, the end node still is able to receive the message over the other cable without any loss of data.

    摘要翻译: 具有用于一个或多个设备与中央集线器之间的通信的冗余拓扑的系统。 该系统包括中央集线器或交换机以及一个或多个端节点,其中每个端节点包括第一端口和第二端口。 第一活动电缆连接到每个端节点中的第一端口和集线器中的第一端口,并且第二有源电缆连接到每个端节点中的第二端口和集线器中的第二端口。 消息通过第一和第二电缆传输到终端节点的第一和第二端口。 终端节点对通过第一和第二电缆接收的消息执行完整性检查,并利用第一个通过支票。 因此,如果一根电缆发生故障,则终端节点仍然能够通过另一根电缆接收消息,而不会丢失任何数据。