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?

[wjwren]

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

hope that makes sense

[wjwren]

think ive solved it by using one of these

[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.

[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

[wjwren]

[wjwren]

actually looking at it thats a 24v!

[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...

[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

[wjwren]

[quote=Henry-F]A few pointers.

Stick with a power supply which uses a normal mains plug.

The option of running new cable isnt really an option - is there anyway round using the existing power cable?

[wjwren]

approx 350 - 400ft length of cable.

[wjwren]

this is turning into a nightmare! So if I ran new cable then is there any specification i need? I may as well run new coax and power.

OK if i run new cable I guess il buy the adaptor you mentioned in your previous link.
And the cable - is there a maxium length I need to stick to?
something like this
http://www.ebay.co.uk/itm/100M-SHOTGUN-RG59-2-CORE...

Edited by wjwren on Monday 8th February 20:45

[wjwren]

ok thanks

I was thinking of putting new power and coax cable in and start from scratch.

[wjwren]

ok ive just measured the furthest distance using google earth and if i put it straight across the roof which is single storey flat it's 145ft