12v poe cameras on a 48v poe NVR

[kenp]

HI guys,

im a newbie here. i just want to ask is there a way where i can make my camera work with my nvr. i just purchased a camera but its 12v poe. when i connected it to the nvr using ehternet cable, it just wont turn on. my bad for buying something w/o checking the spec of my nvr.

badly need your advice. thanks...

 

[Opeth]

I think 12v of the camera says is the jack if you using a power supply. If the camera has poe it work fine with the nvr. Maybe is something else your problem of not showing.

 

[TonyR]

+1^^.
What is make/model of the camera?

 

[kenp]

This is the camera.


Appreciate your help on this

 

[Broachoski]

I have a few Chinese cameras that require the 12 volt input as they are not true POE cams. I use POE to 12v adapters similar to this link. They work very well and are powered by the 44-57 volts from POE switch.

Amazon.com: iCreatin Active 12V PoE Power Over ethernet Splitter Adapter, IEEE 802.3af Compliant 10/100Mbps, 12V Output: Computers & Accessories

Amazon.com: iCreatin Active 12V PoE Power Over ethernet Splitter Adapter, IEEE 802.3af Compliant 10/100Mbps, 12V Output: Computers & Accessories

www.amazon.com

 

[kenp]

using the adapter you specified, i will just directly connect the ethernet ports from nvr to adapter then from adapter to camera leaving the 12v pin not connected?am i right?
sorry for the silly question.

 

[Tekbotslaya]

Does this image help clarify?

You would connect the adapter to the ethernet and 12 volt connectors on the camera.

 

[Broachoski]

Tekbotslaya's photo shows how it's connected, ethernet cable in 1 end and both connectors on camera on other end.
The last ones that I ordered were white and provide more weatherproof connections. Here is a link just FYI.

Amazon.com: ANVISION 4-Pack Active 48V to 12V Waterproof PoE Splitter Adapter, IEEE 802.3af Compliant 10/100Mbps for IP Camera AP Voip Phone and More, White: Computers & Accessories

Amazon.com: ANVISION 4-Pack Active 48V to 12V Waterproof PoE Splitter Adapter, IEEE 802.3af Compliant 10/100Mbps for IP Camera AP Voip Phone and More, White: Computers & Accessories

www.amazon.com

 

[kenp]

thanks for the reply. based on the image above will my camera work even if my camera doesnt have 12v pin on it?
my camera only has ethernet port.

 

[Broachoski]

Wow, this is a new one for me as I have never seen one without the optional 12v connector. Those adapters will not help this situation I cannot find any info on that camera and only assume it may be made to operate only from a proprietary Hamrol NVR, ....... maybe..... Sorry!

 

[TonyR]

Apparently the 12VDC is fed into the camera on pins 4/5 (DC+) and 7/8 (DC-) of the RJ-45 Ethernet connector.

I suggest you purchase a UL listed 12VDC @ 2.0 amp power supply like this with a standard 5.5mm x 2.1mm male power connector.
Then purchase the PoE Texas POE-1 | Passive Power Over Ethernet Injector Combines 10/100 Data and DC Power for PoE Devices .
The device and the power supply are placed indoors, the device accepts that power supply and places the 12VDC power on pins 4/5 (DC+) and 7/8 (DC-) of the Ethernet Rj-45 connector.
The port marked "POE" goes to the camera, the port marked "LAN" goes to your network.
NOTE: Use only Ethernet cable that is terminated to the T-568B standard on BOTH ends of the cable, as pictured below right.

 

[kenp]

Question, the lan port will be connected to the nvr?is this correct?

 

[TonyR]

Question, the lan port will be connected to the nvr?is this correct?

Yes.
The "POE Texas POE-1" LAN port has no connection internally to pins 4/5 and 7/8 so incoming 802.3af POE voltage on an Ethernet cable on those pins will have no affect or purpose to the device; the device will receive power from the POE port; only DATA is passed thru from LAN port to POE port.

 

[kenp]

Thanks a lot. I was already thinking of just accepting the fact that i made a bad purchase.

Glad that i stumble into this forum.

 

[TonyR]

Thanks a lot. I was already thinking of just accepting the fact that i made a bad purchase.

Glad that i stumble into this forum.

Just look for the positive and count it a lesson learned...from now on, insure cameras are real POE, meaning they conform to the 802.3af/at spec.
Some vendors know there's a lot of info to be absorbed by folks just venturing into surveillance cams, etc. and they count on that "info overload" to offload their cheapened, not-so-standard products.

Take the acronym "POE", it means "Power Over Ethernet". Reputable manufacturers insure it adheres to the 802.3af/at spec but NOT so reputable ones deviate from that spec and apply various voltages to various pins and do so passively.

Example: Zmodo has some cams that use what they term "sPOE" (simplified POE ?) in which 18 VDC is passively applied to pins 1 & 6 which splits a pair used for DATA on genuine POE and it doesn't use pins 4/5 and 7/8 for power. Also, it uses pins 2 & 3 for DATA, which in a standard Ethernet cable is the other half of the split pair mentioned above. This non-standard use of split pairs can leave it prone to noise. AVOID ZMODO AT ALL COSTS, not just for this reason.

 

[kenp]

Just an update i already connected the camera to my nvr. It took over a month to deliver the injector due to lockdowns. Thanks to TonyR and to all of you guys.