Cctv 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
————————
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.
|
|
VideoSecu Brand New 2 Pcs Passive Cctv Video Balun Camera Network Transmission Cat5 Vb214cp 1EG $9.99 Extend transmission distances. Transmits a monochrome video signal up to 2,000 feet (610 meters) or color up to 1,300 feet (400 meters). Utilize existing wiring. Already have structured cabling systems? simply connect a balun at each end of the cable run to transmit your signal. Reduce installation cost. UTP cables physically smaller than coax alternatives, more cameras through a smaller diameter,… |
|
|
VideoEase CCTV Video and Power-Thru Balun (Each) $27.49 The combination of baluns and inexpensive Cat. 5 cable allow for the distribution of audio, video and power over long distances. Two MuxLab VideoEase CCTV Video and Power-Thru Baluns (each sold separately) can be used to connect a video and power feed over long distances from a surveillance camera to monitor or DVR and power supply. Simply attach one balun at the sender (surveillance camera) utili… |
|
|
Cat-5 Video Balun with Power over Cat5 The PV5 is a cat5 video balun that allows an installer to use a single Cat-5 cable to run both the CCTV video signal and power to a security camera. CAT-5 Video Balun Installation Please refer to the below diagram to understand how to use this video balun in a surveillance system application…. |
|
|
RJ45 Balun with Audio, Video and Power over Cat-5 $14.99 The VB-2VPA is a RJ45 balun pair that allows an installer to use a single Cat-5 cable to run a CCTV video signal, surveillance audio signal and power to a security camera and audio surveillance microphone. The VB-2VPA is sold as a set that included both the injector and splitter ends. Although this balun can also run audio, many installers do use it to run just video and power. RJ45 Balun Installa… |
|
|
BA-101PTZ – CCTV Passive UTP Video Balun with Video, Power & Data 2 Pcs PACK for PTZ CAMERAS – Pigtail BNC Connector & Built-in surge protection The fast, easy, and low-cost way to connect a CCTV Pan/Tilt/Zoom camera to a monitor or video recorder. This passive balun/transceiver allows for a based and composite video, power and data signal to be transmitted via (UTP) cable for more versatile cabling, high performance and real-time video. It can be used as either transmitter or receiver, it receives one channel video signal, 12 Volt power f… |