PoE with hEX PoE

RouterOS General
1

Hello,

I wrote to support a couple of days ago, but till now I have no reply.

I bought 2 hEX PoE to power cameras, but it doesn’t work, giving me a “current too low”.

Why do you provide inaccurate information in your product description?
It clearly says:
PoE out 802.3af/at

My camera is 802.3af, so why should I now spend money and time to buy a new power adapter from you?

Please explain me this situation.

2

A stupid question - do you power the 'Tiks by the power supply which came with them (24 V or so) or have you followed the instruction and power them by a 48 V supply? The point is that the 'Tiks do not contain a voltage upconverter so while they themselves do work from the 24 V or less, to provide enough voltage for the “real” PoE, they need to get it already at their input.

3

I use supplied power adapter. Should I buy POW48?
How many cameras can it power?

4

Depends, maybe you should buy 48POW (no kidding, will explain below). And I share your wonder why it doesn’t come bundled with hEX PoE automatically, as if you don’t need the “real” PoE, why should you buy a hEX PoE. But at least they sincerely announce in the datasheet that the bundled power adaptor is not a 48V one.


How many cameras can it power?

The POW48, which is still advertised in e-shops, states 0.8 A or 30W. Subtract the maximum consumption of hEX PoE itself (9W) which is likely not to be that high actually, and you’re left with 20 W in total which is 5 W per port if all 4 ports are used, or proportionally more per used port if less ports are used. If that’s enough for your cameras, go ahead.

The 48POW, which is the only one currently listed at Mikrotik’s product page, says 1.46 A or 70 W, which leaves you with 60 W for PoE devices, which makes 15 W per port which is the maximum permitted power according to the standard, so no camera or phone or a fountain clock can ask more.

5

Thank you for your time Sindy, I was just confused, because it says 12-24V on the device near the power connector, so I didn’t know if it’s safe to use POW48. Now I have no doubts!

Thanks again and have a great day.

6

Now wait a minute! It becomes dangerous.
You say that the label on your box says 12-24 V. I look at the photo in the gallery and it clearly shows DC in 10-57 V:

Could it be that you wanted/ordered a hEX PoE (802.3af etc.) and got a hEX PoE lite (with passive PoE only) instead?