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通訊控制

通訊控制
模擬控制：模擬控制后臺可以發送4~20mA的電流來控制閥門的開度。
串行通訊：該方式只需較少的電纜并且可以實現人及通訊，用戶可以取得閥門的工況信息，適用于RS485，RS232，RS422接口。
Fieldbus（Profibus or Lonwork）：通常適用于工業領域。設備之間可以通過一根數據線來全部連接，具備較高的性價比。

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