how to wire cctv into ac dc

[wjwren]

ive bought some new hikvision coax cameras for work, they require a 12v connection. How can i utilise this existing connection here? The hikvision comes with a standard laptop style 12v brick which will fit inside the camera. The old Bosch camera has an ac dc wire.

Any ideas?
thanks

[wjwren]

anyone?

[archie456]

I don't understand the question, not sure if anyone else does.

[wjwren]

thats what comes with the Hikvision iver bought but no way to connect it?

hope that makes sense

[Simpo Two]

That's a transformer to get mains via a 'kettle lead' to a low DC voltage.

So you've bought a camera and a transformer but they don't connect? Does the transformer output 12V?

[jhfozzy]

To save damaging the one that came with the camera, have you got an old charger with the same size plug?

I would cut the plug off with some lead spare, bare the wires and join them to the existing wiring (making sure you get them the correct way around, positive is normally the centre pin on those round plugs).

[wjwren]

think ive solved it by using one of these

[Royce44]

Just cut the plug off the transformer and stripmthe wires back, will be red and black.

Make sure it's the correct voltage output and dc or ac

[wjwren]

have tried the camera's today but i cant get power to them, the old camera works fine but the hikvision wont come on. Im using a dc pigtail like this.

[megaphone]

So you're using the old transformer at the head end and the old white alarm cabling? You've connected the pigtail via the chock block yes?

Have you got the polarity correct?

What voltage is the old system, also 12v DC?

Edited by megaphone on Monday 8th February 12:12

[wjwren]

megaphone said:

So you're using the old transformer at the head end and the old white alarm cabling? You've connected the pigtail via the chock block yes? pig tail via connector block yes

Have you got the polarity correct? yes ive wired hikvision as per same way that the old bosch camera was

What voltage is the old system, also 12v DC? 12v dc yes

Edited by megaphone on Monday 8th February 12:12

[megaphone]

Possibly the old transformer does not produce enough amps for the new camera? They'll be marked 12vDC 1A or 500ma or similar.

[wjwren]

[wjwren]

actually looking at it thats a 24v!

[jhfozzy]

wjwren said:

actually looking at it thats a 24v!

And AC

[megaphone]

So you may well have fried your new cameras! Do they still work with the new PSU?

[wjwren]

yes they still work. What a fk up! My fault.
So if I buy a 12v dc to replace that im thinking all will be ok?
And what type of 12v supply should I get any recommendations
Looking at this . http://www.ebay.co.uk/itm/9-Port-12V-DC-Camera-Pow...

[megaphone]

How many cameras do you have? What current do they need, what is the amp rating on the camera?

I suspect the existing power cabling is a parallel circuit running from camera to camera? You should be able to use this if you get a 12VDC PSU with the correct current/amp rating.

That PSU you have linked to requires an individual cable going to each camera, you could use the individual cores of the current cable but it will be a faff, better off getting a single PSU that can do the job.

What is the exact spec of the PSU that has been supplied with each camera?

Edited by megaphone on Monday 8th February 17:15

[Henry-F]

A few pointers.

Ignore everyone who is telling you to cut the ends off any cables. You will immediately invalidate any warranties and you are likely to damage things. You've already tried to power a 12V DC camera with a 24V AC power supply. All the DC plugs, sockets and so on are available off the shelf with easy to use screw terminals.

The power supply you have linked to must be hard wired with a fused spur. It is not a DIY fit item particularly if you are fitting it at work. It needs to be fitted by a qualified electrician. Stick with a power supply which uses a normal mains plug.

In terms of the wiring you have there it really is anyone's guess. I suspect someone has used some form of data or telephone wire and doubled it up to avoid voltage drop. You need to investigate more.

The power supply you were going to put inside the camera isn't waterproof. You don't want to have mains voltage inside a camera enclosure if possible. The general idea is you fit the power supply inside the building possibly near the DVR and then run 12 volt power to the camera using the same cable which takes video back to the DVR (subject to cable type etc).

Henry

[wjwren]

megaphone said:

How many cameras do you have? What current do they need, what is the amp rating on the camera?

I suspect the existing power cabling is a parallel circuit running from camera to camera? You should be able to use this if you get a 12VDC PSU with the correct current/amp rating.

That PSU you have linked to requires an individual cable going to each camera, you could use the individual cores of the current cable but it will be a faff, better off getting a single PSU that can do the job.

What is the exact spec of the PSU that has been supplied with each camera?

Edited by megaphone on Monday 8th February 17:15

it's a 12v 1amp adapter . There are 6 camera's in total
Yes i think the cable runs from camera to camera as there are 2 poles, each with 3 cameras on and the wiring going into the pole is 3 coax cables and 1 of these white power cables