anpog001
Posts: 1
Joined: Thu May 16, 2019 7:19 am

PoE HAT Class 2 / 3 ?

Thu May 16, 2019 7:59 am

Hello community,

I want to use the PoE HAT to supply my Raspberry Pi 3 B+.
In the datasheet it is written that the PoE HAT is a class 2 (4W to 7W) device with output power of 5V DC / 2.5 A, so 12.5W.
But 12.5W belongs to a class 3 device (7W to 13W). Is this a mistake?

I want to connect the Pi Cam NoIR and another simple Webcam.
Does the real classification depend on the peripherals, so the complete system?

I want to use the DGS-1100-05PD Switch to supply the Pi and another PoE Cam (2.7W).
The switch categorizes in classes and then decides whether the connected devides can be supplied or cannot.
A class 3 specification would be too much for the switch.

Does anyone have experience with that?

Thanks all!

fruitoftheloom
Posts: 19817
Joined: Tue Mar 25, 2014 12:40 pm
Location: Delightful Dorset

Re: PoE HAT Class 2 / 3 ?

Thu May 16, 2019 3:37 pm

anpog001 wrote:
Thu May 16, 2019 7:59 am
Hello community,

I want to use the PoE HAT to supply my Raspberry Pi 3 B+.
In the datasheet it is written that the PoE HAT is a class 2 (4W to 7W) device with output power of 5V DC / 2.5 A, so 12.5W.
But 12.5W belongs to a class 3 device (7W to 13W). Is this a mistake?

I want to connect the Pi Cam NoIR and another simple Webcam.
Does the real classification depend on the peripherals, so the complete system?

I want to use the DGS-1100-05PD Switch to supply the Pi and another PoE Cam (2.7W).
The switch categorizes in classes and then decides whether the connected devides can be supplied or cannot.
A class 3 specification would be too much for the switch.

Does anyone have experience with that?

Thanks all!

https://www.raspberrypi.org/blog/introd ... t-poe-hat/

There are various standards of PoE; this HAT uses the most common standard 802.3af, which allows delivery of up to 15W.
adieu

My other Computer is an Asus CS10 ChromeBit running Chrome Operating System.
HP Envy 4500 Wireless Printer supported by HPLIP software in Raspbian Buster.
Raspberry Pi Model 2B v1.1

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