Re:The Rock 5B is not a Raspberry Pi killer–yet
by chazeon on Wednesday February 01, 2023 @02:32PM
(#34616249)
I am talking about U6-Pro, specs here [pdf]: https://dl.ubnt.com/ds/u6-pro_ds which is asking for a 48V, 0.5A PoE adapter, so should supports 24 W max. the consumption is listed to be 13W though. U6-LR is 17W.
Re:The Rock 5B is not a Raspberry Pi killer–yet
by dragontamer on Wednesday February 01, 2023 @02:36PM
(#34616327)
Hmmm.
https://en.wikipedia.org/wiki/Power_over_Ethernet#Two-_and_f...
> The original IEEE 802.3af-2003[1] PoE standard provides up to 15.4 W of DC power (minimum 44 V DC and 350 mA)[2][3] on each port.[4] Only 12.95 W is assured to be available at the powered device as some power dissipates in the cable.[5]
Talking about original PoE standard here. Looks like 13W is closer to the practical maximum.
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It looks like there are newer PoE+ and 4PPoE standards that increase the power.
> U6-LR
U6-LR requires the updated PoE+ standard which gives more power.
My first search revealed: https://store.ui.com/products/u6-lite-us
> Power method PoE, passive PoE (48V)
> Max. power consumption 12W
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> I guess 15W SBC is not so much of issue for PoE?
Its not just 15W SBC, but also ~5W screen (assuming 7" screen). So it'd be closer to 20W worst case.