Replacing 24vac PTZ with 12vdc dome CCTVs

[don3149 0]

Hello all,

 

I really need and appreciate your assitance. I work at a Hotel and we are upgrading our 15 year old PTZs, 24volt AC, with Samsung SCD-3081 12volt DC. What are my options without having to run all new cabling?

 

Thank you all,

 

Don

[Soundy 1]

According to Samsung (http://www.samsung-security.com/products/security-cameras/analog-cameras/fixed-domes/scd-3081.aspx) those are dual-voltage cameras, and will work with 12VDC and 24VAC.

 

However, if you're not set on the Samsungs, you might want to look at these: http://www.cnbusa.com/en/html/product/product.php?inc=spe&seqx_prod=1073#p_v1 - specs are way better, especially low-light specs, and cost about 50% less ( web search shows the Samsungs going for $250-$300).

 

All that aside, you wouldn't need to change wiring to use 12VDC-only cameras; you'd only need to change the power supply.

[fa chris 0]

I'd stick with 24vac if the new cameras will accept it. 24vac will work on longer cable runs than 12vdc can, since it's existing cabling and we don't know the length of it, it's better to stick with 24vac. Plus you can probably keep the same power supply this way.

[don3149 0]

Thanks for your quick and insightful replies.

 

I am in Korea, and I am looking at the Korean users manual and it is exactly the same as the English one, but it only talks about 12v DC. Nothing about dual voltage or 24C ac.

 

taking the housing dome off, everything is in English.....Wondering if these are exactly the same???? English and Korean.

[Soundy 1]

Look at the power connectors on the cameras - if they're a barrel jack, they're probably 12VDC only. If they have some kind of screw terminals, they may be dual; if they're 12VDC only, they'll have polarity markings on the connectors.