POE switch

[pilot04 0]

I was wondering if this is how the setup would be for an analog camera hooked up to a Trendnet TPE-S44 POE switch with some RJ45 baluns connected via cat5e cable to POE switch and Gig switch(DVR is connected to this switch).

 

 

Would the Trendnet POE switch have enough juice to power a CNB VCM-24VF?

Do I have to have the matching balun pair to make this work?

Is anyone using this POE switch powering a CNB dome or similiar?

[Soundy 1]

This will not work. At all.

 

First and foremost, baluns do not turn analog cameras into network cameras. You use one on each end of the run to make a balanced signal over a wire pair... that's it.

 

Given the above, everything else is moot, but just for reference: PoE switches require specific circuitry in the device being powered, that tells the switch there's a PoE device present and it should turn on power for that port (it may also tell the switch whether to use Mode A or Mode B power, and how much power the device will require). Hooking things up this way would NOT tell the switch to power that port anyway.

 

Plus, your power/video balun would use different pairs for power than the PoE output, and the switch would probably detect a short, and not power the port either.

 

And if it did, well... PoE spec is 44VDC, which would fry that camera in quick order.

 

(Completely irrelevant at this point, but to answer the other part of the question: yes, a PoE switch would have plenty of capacity for these cameras - they only require 2.2W, and PoE spec allows up to 15.4W per port.)

 

This setup WOULD work with IP cameras (no balun)...

[pilot04 0]

Appreciate the detailed response to why it would fail! I'll use baluns at both ends for the analog camera I'm ordering. I'll save the TPE-S44 for use when the IP cameras come down to a reasonable price for diy home use hopefully in the next few years.