Power Balun
UTP cat-5 passive 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 understand. I’m looking at using “passive baluns” to connect each camera to the dvr. Now the descriptions in every listing I read says something along the lines of “passive device – no external power required”. Does that mean simply that the BALUN itself doesn’t need a power supply, or does that mean that when using baluns the CAMERA doesn’t need an external power source?
It’d be awesome if the latter case were 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 each 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-VITEKVTTR1M.html
Thanks!
The Passive Balun means you can transmit a video signal using cat5 cable.
The advantage is that you can transmit video over a longer cable run, usually up to 300m using passive balun. Normal coaxial cables have a limit of around 90m. The twisted cable pairs in cat5 is also good at rejecting electro interferrence.
‘No power required’ or ‘Passive’ means that you do not need 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 make any difference to the distance you can feed power. After 60m of cable, the voltage on most cables 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 higher originating voltage.
Here’s a few tips
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1) Use a balun that has a power connector with it so you only need one device o make video & power conection on camera side e.g see the balun with the dc connector here http://www.cop-security-online.co.uk/acatalog/Shop__front_Passive_system_36.html
2) A trick I did on an installation with long distance cameras is use a 24vAC power supply then I used a 24vAC to 12vDC convertor guaranteeing I could get 12v on the camera end up to 250m away
Hope this helps.
Passive Power Video Baluns
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HIGH POWER BALUN TRANSFORMER, 5KW CW, 3-30 MHZ $59.99 |
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2 x UTP Passive Power Data Video Balun CCTV Transceiver Black $20.38 |
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10 Sets Camera Video Power Balun Transceivers Cat5 LAN $69.99 |
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CCTV RJ45 VIDEO BALUN WITH POWER UTP CAT5 CABLE TRANSMIT RECEIVER BNC PAIR $8.30 |
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2 Video Balun+power+audio Video Transceiver CAT5e-8A $12.99 |
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1 Ch Video & 12V Power Long distance UTP LAN Cable Balun with Supply U2S $13.50 |
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1 Pair Cat5 Passive Video Power Balun Transceiver 4 Camera Monitor Card Recorder $10.98 |
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1 port Cat5 Passive Video and Power Balun Transceiver $10.98 |
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Security 2 Video Balun+power+audio for CCTV use -8B $12.99 |
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1 Channel Power Video Balun UTP Receiver Transmitter $23.36 |
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1 Port Passive Video Data Power Balun Transceivers $15.98 |
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1 Channel Power Video Balun UTP Receiver Transmitter $23.36 |
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LAN POWER VBUPC VIDEO BALUN W/CAT5E PATCH CORD $24.00 |
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GEM BLN-PVRJ45-1 CCTV-Balun BNC Plug with power lead $25.00 |
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CYREX CBLNPT BNC Male Balun Transceiver w / power $34.00 |
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AZCO AZBLN215 1 CHANNEL PREM PASS. VIDEO/POWER balun $37.00 |
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AZCO AZBLN217 1 CHANNEL PASSIVE VIDEO/POWER BALUN. (P $36.00 |
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MUXLAB 500024 VIDEOEASE POWER-THRU BALUN,RJ45 $30.00 |
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MUXLAB 500029 CCTV POWER THRU BALUN.ST $30.00 |
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ALTRONIX HUBWAYAV2 SLIM VID BALUN VID/DATA/POWER $31.00 |
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GEM ELECTRONICS BLNVPDRJ45 CCTV Balun-BNC Plug with Separate Power $43.00 |
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MUXLAB 500024 POWER THRU BALUN $39.00 |
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Grey 1 Channel Passive Video Audio Power Balun Transceiver $19.26 |
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PVD UTP/CAT5 BNC Male To RJ45 Converter Power/Data CCTV Video Balun Transveiver $13.99 |
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100pc RJ45 Balun with Audio/Video/Power over Transceiver cable with cat5 $259.90 |
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CCTV Video Audio Power Balun Transceiver Camer UTP ,C $2.33 |
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CCTV Black Shell RJ45 UTP Cat5 Power Video Balun Transmission 2 Pcs $12.25 |
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CCTV Camera BNC 2.1×5.5mm Audio Video Power Balun Transceiver Pair $10.56 |
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2 Pcs Black Shell Video Power Balun Twisted Pair Transceiver for CCTV $9.15 |
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200M UTP Trasmission CCTV Camera Video Power Balun Gray $10.53 |
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Grey 1 Channel Passive Video Audio Power Balun Transceiver $19.26 |
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LAN POWER VBU VIDEO BALUN MALE CNNECT W/RJ45 $21.00 |
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AV Power Balun UTP Network Transceiver for CCTV Camera $11.83 |
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New CCTV Video Audio Power Balun Transceiver Camera UTP $0.01 |
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200M UTP Trasmission CCTV Camera Video Power Balun Gray $10.55 |
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Passive Balun Video & Power Over Cat5 Cat5e UTP for CCTV Camera Free Shipping $22.00 |
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RJ45 Coax BNC Twisted UTP Camera Audio Video Power Balun 200M Pair $10.57 |
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2 Pcs Black Shell Video Power Balun Twisted Pair Transceiver for CCTV $9.12 |
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CCTV Camera BNC 2.1×5.5mm Audio Video Power Balun Transceiver Pair $10.54 |