檢測:剛開始時,PSE設備端口輸出電壓很小,直到檢測到線纜終端連接為一個支持IEEE 802.3af標準的受電端設備。
PD端設備分類:當檢測到受電端設備PD之後,PSE設備可能會為PD設備進行分類,並評估該PD設備的功率損耗。
開始供電:在一個可配置時間(一般小於15μs)的啟動期內,PSE設備開始從低電壓向PD設備供電,直至提供48V的直流電源。
供電:為PD設備提供穩定可靠的48V直流電,滿足PD設備不超過15.4W的功率消耗。
斷電:若PD設備從網絡上斷開時,PSE就會快速(通常在300~400ms之內)停止為PD設備供電,並重複檢查過程以檢測線纜的終端是否連接PD設備。
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How does POE power over Ethernet work?
Detection: At the beginning, the output voltage of the PSE device port is very small, until it is detected that the cable terminal is connected as a power receiving device that supports the IEEE 802.3af standard.
PD device classification: After detecting the power receiving device PD, the PSE device may classify the PD device and evaluate the power loss of the PD device.
Start of power supply: During the startup period of a configurable time (generally less than 15μs), the PSE device starts to supply power to the PD device from a low voltage until it provides a 48V DC power supply.
Power supply: Provide stable and reliable 48V direct current for PD equipment, meeting the power consumption of PD equipment not exceeding 15.4W.
Power failure: If the PD device is disconnected from the network, the PSE will quickly (usually within 300~400ms) stop powering the PD device, and repeat the inspection process to detect whether the terminal of the cable is connected to the PD device.
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