UTP cat-5 serious balun for CCTV camera system...?

I've been researching CCTV systems - standalone DVRs and cctv cameras - and I've come across something I don't completely read between the lines. I'm looking at using "passive baluns" to connect respectively camera to the dvr. Now the descriptions in every list I read says something along the lines of "unresponsive device - no external power required". Does that mean simply that the BALUN itself doesn't stipulation a power supply, or does that mean that when using baluns the CAMERA doesn't stipulation an external power source?

It'd be awesome if the latter case be true, as my company is looking at a 16 camera system, and we'll be running somewhere around 4000ft of cable. It'd be nice if we could just run a cat-5 cable from respectively camera instead of a video cable to the dvr AND a power cable to a reserved power supply box.

Any suggestions?

p.s. - example of the baluns I'm looking at: http://www.2mcctv.com/product_info-VITEK...

Thanks!


Answers:    The Passive Balun means you can transmit a video signal using cat5 cable.

The dominance is that you can transmit video over a longer cable run, usually up to 300m using passive balun. Normal coaxial cable have a ceiling of around 90m. The twisted cable pairs in cat5 is also righteous at rejecting electro interferrence.

'No power required' or 'Passive' means that you do not have need of a powered amplifier or any power source to extend the VIDEO SIGNAL ONLY.....up to 300m.

'Active Balun' is a powered balun which means it will amplify the video signal up to 1200m or so.

If you use the cat5 cable to run power to the cameras, the balun will not trademark any difference to the distance you can feed power. After 60m of cable, the voltage on most cable start to drop.

If you want a long cable run to power your camera, use a 14v power supply for 12v cameras or 28v psu for 24v cameras. In this case any voltage drop over the distance of the cable will be slightly compensated by the complex originating voltage.


Here's a few tips
------------------------

1) Use a balun that have a power connector with it so you lone need one device o variety video & power conection on camera side e.g see the balun with the dc connector here http://www.cop-security-online.co.uk/aca...

2) A trick I did on an installation beside long distance cameras is use a 24vAC power supply then I used a 24vAC to 12vDC convertor guaranteeing I could attain 12v on the camera end up to 250m away


Hope this help.
go to www.techcctv.com or bequeath them a call they can lend a hand

The answers post by the user, for information only, CeQnA.com does not guarantee the right.



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