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US08112565B2 Multi-protocol field device interface with automatic bus detection 有权
具有自动总线检测功能的多协议现场设备接口

Multi-protocol field device interface with automatic bus detection
Abstract:
A multi-protocol interface for coupling a field device to a general purpose computer is disclosed. The interface includes measurement circuitry to perform a plurality of measurements on a connected process communication loop to determine a process communication loop type. Then, if the interface includes a protocol interface module that matches the detected loop type, the protocol interface module can be engaged. A method for coupling a field device to a general purpose computer is also provided. In one aspect, power from the general purpose computer is used to power the process communication loop, if the interface determines that the loop is not powered.
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