Hi Guys,

Hope someone can help me. I have bought 2 cctv ptz camera. They use a 12v 1A output psu. Now i need to have this about 10 to 15 meters away. When I try to extend it the cams do not work. Can anyone help me please?

Raj

 

Extend what?
How do they not work?

 

The camera came with a psu with about 1 meter cable. I am trying to extend the psu cable so that I can have the cam outside the house and all the plugs inside the house. The camera start to just flash.

Here is a link of a similar cam from ebay.

http://www.ebay.co.uk/itm/QZO-Srica...356978920?pt=UK_CCTV&var=&hash=item20e98852e8

Thanks for the help.

 

What gauge of wire did you use?

 

What gauge of wire did you use?

I been trying to use cat 5e so that I could use 1 cable only for data and power.

 

I used 2 pairs to bring data and have tried with either 1 or 2 pairs for power

 

Cat5 wire gauge

Voltage loss calculator.

Can you double up on the DC feed wires? Two parallel #24s are equiv to #22

Are you running two cameras on one cable, or only one?

 

Cat5 wire gauge

Voltage loss calculator.

Can you double up on the DC feed wires? Two parallel #24s are equiv to #22

Are you running two cameras on one cable, or only one?

nope 1 per cable
Have tried to double but still no joy :-(

 

Do the voltage loss calculation. I think you will see the problem....

You could get a new 16V power supply

 

Do the voltage loss calculation. I think you will see the problem....

You could get a new 16V power supply

16v 1a?

 

I have one of this box
http://www.ebay.co.uk/itm/CCTV-12V-...089?pt=LH_DefaultDomain_3&hash=item2303f852a1

If i tried to use 2 of the outputs as each 12v so both is 24v will it work?

 

I have one of this box
http://www.ebay.co.uk/itm/CCTV-12V-...089?pt=LH_DefaultDomain_3&hash=item2303f852a1

If i tried to use 2 of the outputs as each 12v so both is 24v will it work?

I think you will find that all the outputs share a common ground, so you cant series them.

Do you have a multimeter? If so, measure the actual voltage right at the input to the camera?

 

I think you will find that all the outputs share a common ground, so you cant series them.

Do you have a multimeter? If so, measure the actual voltage right at the input to the camera?

ok used a normal 12v psu.

If the normal cable is used, it works. If i connect the ethernet cable, then i have 12.6v but as soon as i connect the cam the readings keeps jumping but never over 1. its always .456 or 685 or so. Those last 2 figures were just examples, goes too quickly to read properly.

Pls advise.

this psu is a 2 amps

 

You might have the wires in the ethernet cable crossed. I would expect the voltage at the camera to be a steady, but low value, like 9V or 8V. There should be a +12V connection at both the power supply and camera, and a 0V (gnd) connection at both the power supply and camera.

 

You might have the wires in the ethernet cable crossed. I would expect the voltage at the camera to be a steady, but low value, like 9V or 8V. There should be a +12V connection at both the power supply and camera, and a 0V (gnd) connection at both the power supply and camera.

Just double check and i been using the blue and blue/white and brown and brown/white for power.

The other 4 cable, 2 pairs are working well as ethernet and can connect to it fine.

So I am not sure anymore

 

Sounds like you may have the blue and brown cross wired.
What does it do if you just use one pair of wires for the power?