Passive POE (Power Over Ethernet) adapter, uses unused pairs of 100baseT network cable to transmit power to remote device.
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DC Jack :
RJ45 pins :
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Center positive, 2.1 mm pin.
4-5 = positive , 7-8 = negative.
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Issues : |
• Passive POE does not comply with the IEEE 802.3af specification.
• To minimize cable losses, feed the highest allowed voltage, e.g. 18V.
• To avoid ground loops, ground should be referenced on the receiving end only. |
