Use 24 V safe voltage whose power is supplied by signal cable.

采用24V安全电压,信号线缆集中供电.

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With low safe voltage USB joint , it only need 5 V, no noise and low consume?

使用超低安全电压USB接口, 输入仅需直流5V 、 无噪音低耗量.

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With low safe voltage USB joint , it only need 5 V, no noise and low consume?

使用超低安全电压usb接口, 输入仅需直流5V 、 噪音低耗量.

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