How much voltage can you put to a 12V camera

[gtxkid 0]

I was wondering how much can they take.

I work arround a lot of diferent power supply's that put out different voltage's.

How much can a 12 volt camera take and what is optimum voltage.

[Soundy 1]

Depends on the camera. I've seen cheap cameras fry when used with a cheap, unregulated 12V adapter that actually puts out close to 16VDC. Cameras with built-in regulators, including most dual-voltage types, will often take anything up to 30+V, DC or AC. Most fall somewhere in between. In general, most should withstand an unregulated supply just fine.

[survtech 0]

Not Dallmeier. We fried one hooking it up to a Radio Shack 12V power supply (actual voltage was 13.2VDC). After the smoke came curling out of the camera, we checked its manual: "12VDC +/- 5%".

 

Five percent? In a CCTV environment? I wonder what they were smoking?

 

And Dallmeier is by no means "cheap".

[Tailbone215 0]

Not Dallmeier. We fried one hooking it up to a Radio Shack 12V power supply (actual voltage was 13.2VDC). After the smoke came curling out of the camera, we checked its manual: "12VDC +/- 5%".

 

Five percent? In a CCTV environment? I wonder what they were smoking?

 

And Dallmeier is by no means "cheap".

 

My suspicion here is the camera or power supply had other issues as there is no way in hell that 13.2VDC is going to fry a piece of equipment that is rated for 12v nominal. Most equipment (camera) comes with a built in voltage regulator that will drop the overvoltage down to what is needed. Any camera, no matter how expensive or how highly rated it is should be used if it is this sensitive to power fluctuations. Remember, we aren't using multi-thousand dollar lab grade power supplies in the field.

[survtech 0]

My suspicion here is the camera or power supply had other issues as there is no way in hell that 13.2VDC is going to fry a piece of equipment that is rated for 12v nominal. Most equipment (camera) comes with a built in voltage regulator that will drop the overvoltage down to what is needed. Any camera, no matter how expensive or how highly rated it is should be used if it is this sensitive to power fluctuations. Remember, we aren't using multi-thousand dollar lab grade power supplies in the field.

Nope. The tolerance was confirmed by Dallmeier - +/-5%. That's 11.4-12.6 volts. 13.2V (actually 13.35V measured voltage under a typical 0.5A camera load) would likely fry the camera; as admitted by Dallmeier.

[Tailbone215 0]

My suspicion here is the camera or power supply had other issues as there is no way in hell that 13.2VDC is going to fry a piece of equipment that is rated for 12v nominal. Most equipment (camera) comes with a built in voltage regulator that will drop the overvoltage down to what is needed. Any camera, no matter how expensive or how highly rated it is should be used if it is this sensitive to power fluctuations. Remember, we aren't using multi-thousand dollar lab grade power supplies in the field.

Nope. The tolerance was confirmed by Dallmeier - +/-5%. That's 11.4-12.6 volts. 13.2V (actually 13.35V measured voltage under a typical 0.5A camera load) would likely fry the camera; as admitted by Dallmeier.

 

It's not that I doubt you, I find this one a little strange. Even mobile devices rated for 12v run at a nominal voltage of 13.8v or higher. Do they pair it with a rated power supply that they can guarantee these voltage tolerances throughout the usable life of the camera? Do you void warranty if you use another brand PS? I won't be buying these cameras.

[survtech 0]

They seem to have made some progress in this area. Their DF3000A-DN (the one we "blew up"), now claims "Voltage supply 12V DC, 24V AC +/- 10% (50/60 Hz)". That's a range of 10.8V-13.2V; and it now accepts 24VAC (at the time, it was 12VDC only).

 

http://www.dallmeier-electronic.com/en/cctv-ip-video-surveillance/cameras/models/box-cameras.html

 

It does have an excellent picture and one of the best WDR capabilities I've seen.

[jeffm0927 0]

Depends on the camera. I've seen cheap cameras fry when used with a cheap, unregulated 12V adapter that actually puts out close to 16VDC. Cameras with built-in regulators, including most dual-voltage types, will often take anything up to 30+V, DC or AC. Most fall somewhere in between. In general, most should withstand an unregulated supply just fine.

 

I have a Speco dual voltage HT7815DNV camera and just lost video, it says it needs a power supply of 12v 500mA, I have a 12v 1 amp power supply hooked up to it. You dont think that would of fried it do you?

[Soundy 1]

Depends on the camera. I've seen cheap cameras fry when used with a cheap, unregulated 12V adapter that actually puts out close to 16VDC. Cameras with built-in regulators, including most dual-voltage types, will often take anything up to 30+V, DC or AC. Most fall somewhere in between. In general, most should withstand an unregulated supply just fine.

 

I have a Speco dual voltage HT7815DNV camera and just lost video, it says it needs a power supply of 12v 500mA, I have a 12v 1 amp power supply hooked up to it. You dont think that would of fried it do you?

No... rather, the current rating wouldn't have anything to do with it. Amperage on a power supply is a rating of the maximum current a power supply is CAPABLE of providing... how much is actually drawn from it will depend on the resistance presented by the device(s) it's powering. You can't "force" more current into something than it's designed to draw.

 

Now, I can't say for that supply SPECIFICALLY, because as I say, if it's pushing too much VOLTAGE, that could potentially fry the camera.

[jeromephone 6]

my guys have pretty much at 100% camera failure when a 12 Dc is hooked to 24vac we try to use all dual voltage cameras if possinle