Lower place machine can and field sensor and transducer, industrial automation instrument is linked together, data communication, data processing and data management.

下位机可以和现场的传感器、变送器、自动化仪表相连，进行数据通信、数据处理和数据管理。

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On-line data centers are increasing their capacity to deal with this increased demand for processing power, communication speeds and digital storage capacity but despite the increases in efficiency of enterprise equipment and software there is a price to pay for universal connectivity and general on-line resources.

FORBES: Nothing Comes for Free