247 Posted May 16, 2006 Share Posted May 16, 2006 Guys Looking for a bit of advice.. Just been awarded a big school to camera up, its a very old school with hardly any light for the external cameras, there are 16 external cameras which all require IR Lighting, i normally power these locally using 240 v Floods, but due to the building this i not pratical and will have to power them all from one area which is where the equipment is going to sit.. The problem i am having is that there are already 29 cameras going in the Caretakers office with 2 X 16 way power supplys, i have never used the 12v IR Floods versions to which i will go for in this installations but i cannot find a power supply big enough to take that many Floods with the output of about 1.4 amps per channel... Any advice please would be great Link to comment Share on other sites More sharing options...
morph Posted May 16, 2006 Share Posted May 16, 2006 Speak to Elmedene or Dantec. Fit a Sarell box and use individual PSU's component board PSU's and mount a load of them in the box, you will need to allow for ventilation. You will also have to consider voltage drop over cables etc. I would also look at mounting PSU's not neccesarilly in the camera location, but scatttered throughout the building maybe next to the main distribution boards, I would avoid having all the PSU's in one location though. Link to comment Share on other sites More sharing options...
247 Posted May 16, 2006 Author Share Posted May 16, 2006 Speak to Elmedene or Dantec.Fit a Sarell box and use individual PSU's component board PSU's and mount a load of them in the box, you will need to allow for ventilation. You will also have to consider voltage drop over cables etc. I would also look at mounting PSU's not neccesarilly in the camera location, but scatttered throughout the building maybe next to the main distribution boards, I would avoid having all the PSU's in one location though. Thanks for the tip i will look into this I am trying to avoid psu's in one location but i don't think i can due to the layout of the building.. Never had to install more than 5 IR's before so 16 is a nightmare, the local council wont allow lights on the listed building, but have allowed the cctv cameras ..weird.. Link to comment Share on other sites More sharing options...
Alexg Posted May 24, 2006 Share Posted May 24, 2006 Why cant you take 240v from a central location and loop round to each camera with the PSU next to the camera? Link to comment Share on other sites More sharing options...
Matt the Teckie Posted May 25, 2006 Share Posted May 25, 2006 I agree with Alex, aside from the risk of using the wrong cable to carry for 1.4A+, the IR lamp's photocell is often located on the PSU. The cable required (and I'm no spark), I guess, would be as thick as mains flex anyway. Don't forget that if you send mains instead of 24Vac, there'll be 10 times less current drawn. I=V/R Link to comment Share on other sites More sharing options...
247 Posted May 25, 2006 Author Share Posted May 25, 2006 Thanks Guys Having spoken to Derwent, they say the same as you, the IR's have to be powered local to the camera, which is causing a massive headache due to the layout of the building, however if your gonna do a job do it properly i say. Thanks for the advice, guys Link to comment Share on other sites More sharing options...
Alexg Posted May 25, 2006 Share Posted May 25, 2006 I don't get it? You would of had to of got a cable to the camera head anyway, so what difference does it make whether its 24v or 240v? Use FP200 for a nice job, want to subb the job out? Link to comment Share on other sites More sharing options...
Guest Posted May 25, 2006 Share Posted May 25, 2006 I don't get it? You would of had to of got a cable to the camera head anyway, so what difference does it make whether its 24v or 240v? Use FP200 for a nice job, want to subb the job out? You're taking the mick, right? Link to comment Share on other sites More sharing options...
Alexg Posted May 25, 2006 Share Posted May 25, 2006 You're taking the mick, right? ? Link to comment Share on other sites More sharing options...
247 Posted May 26, 2006 Author Share Posted May 26, 2006 I don't get it? You would of had to of got a cable to the camera head anyway, so what difference does it make whether its 24v or 240v? Use FP200 for a nice job, want to subb the job out? Thats the point the initial post was to see if anyone had an alternative to this solution, i did not want to run 240v to 16 cameras i wanted to run it all in 12v, but that is not possible, however the alternative is to take power locally at 5 different points and create some small mains circuits to power the 16 IR's. Link to comment Share on other sites More sharing options...
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