PoE injector with PoE enabled IP camera

iamlucky18

I'm thinking of buying a Hikvision cube IP camera that is PoE enabled. These cameras are not usually supplied with separate power adapters as they can be powered directly from the NVR, which I don't have. My intended setup is to connect the camera to my NAS via my virgin media hub.

My question is, will a PoE injector enable the camera to be powered over ethernet as want to avoid as much cross room cabling as possible. There aren't any nearby power outlets where the camera will be installed unfortunately.

kwikbreaks

You need to check the camera power and connectors. You can buy pairs of PoE adapters on eBay but they are designed so you can put power from a wallwart over the cable as well as 100Mbps ethernet and take the standard barrel type power connectors CCTV cameras use. If the camera has some proprietary setup adapters such as those may not match the requirements.

iamlucky18

This is the camera I'm thinking of getting: https://www.use-ip.co.uk/hikvision-ds-2cd2442fwd-iw.html

It has an RJ45 port and power port. Another site states you would need a separate 12v adapter so I assume she PoE injector like the one below should be sufficient?
http://www.solwise.co.uk/wireless-poe-injector-pse30g-at.htm

I'm a newbie when it comes to advanced networking stuff....

System

Hi

The manual says...
Please adopt the power adapter which can meet the safety extra low voltage (SELV) standard. And source with 12 VDC or 24 VAC (depending on models) according to the IEC60950-1 and Limited Power Source standard.

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Mostly a minefield

http://pinoutguide.com/Net/poe_pinout.shtml

IEEE 802.3af standard POE pinout:

Pin Alternative A Alternative B 1 Vport Positive 2 Vport Positive 3 Vport Negative 4 Vport Positive 5 Vport Positive 6 Vport Negative 7 Vport Negative 8 Vport Negative

If memory serves me well, we regard A as American and B for British.

So...
http://pinouts.ru/NetworkCables/ethernet_10_100_1000_pinout.shtml
EIA/TIA 568B Ethernet UTP cable wiring diagram

Pin Signal Name Description cable wire color Name Pin 1 TX+_D1 Transmit Data+ White with orange stripe
TX+_D1 1 2 TX-_D1 Transmit Data- Orange with white stripe or solid orange
TX-_D1 2 3 RX+_D2 Receive Data+ White with green stripe
RX+_D2 3 4 BI+_D3 Bi-directional+ Blue with white stripe or solid blue
BI+_D3 4 5 BI-_D3 Bi-directional- White with blue stripe
BI-_D3 5 6 RX-_D2 Receive Data- Green with white stripe or solid
RX-_D2 6 7 BI+_D4 Bi-directional+ White with brown strip

BI+_D4 7 8 BI-_D4 Bi-directional- Brown with white stripe or solid brown

BI-_D4 8 EIA/TIA 568A Ethernet UTP cable wiring diagram

Pin Signal Name Description cable wire color Name Pin 1 TX+_D1 Transmit Data+ White with green strip
TX+_D1 1 2 TX-_D1 Transmit Data- Green with white stripe or solid green
TX-_D1 2 3 RX+_D2 Receive Data+ White with orange stripe
RX+_D2 3 4 BI+_D3 Bi-directional+ Blue with white stripe or solid blue
BI+_D3 4 5 BI-_D3 Bi-directional- White with blue stripe
BI-_D3 5 6 RX-_D2 Receive Data- Orange with white stripe or solid orange
RX-_D2 6 7 BI+_D4 Bi-directional+ White with brown strip
BI+_D4 7 8 BI-_D4 Bi-directional- Brown with white stripe or solid brown
BI-_D4 8 Note: It is very important that a single pair be used for pins 1 and 2; 3 and 6, 4 and 5, 7 and 8. If not, performance will be degraded.
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So I think that there is scope for error in the supply voltage, and on which cable colours it's carried thru.

System

Hi

I would just point out that GIGABIT is carried over all 8 wires, and I believe Gigabit POE uses all 8 wires. The PoE adapter you may use is a gigabit device, AND carries a suitable warning paragraph..

It does seem to provide a splitter to drop the 48volts to 12volts for the end device, but you need to check.


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This looks like you may be mixing technologies that Virgin Media may struggle to cope with. Bearing in mind that that the PoE may flow back to the VM switch as well as forward to your camera, (May only be 12v DC and not the PoE standard of 48v but still a potential hazard).

iamlucky18

Hmmmm. Looks like I need to do some further research. Thanks for the info.

System

Hi

Solwise do a PoE white paper that should help to calm your fears.

#################
The PSE30G-AT from IP-COM is a PoE injector to provide PoE for an Ethernet network. This technology provides a power supply on current Ethernet cable for data connecting, no need to change the current Ethernet facilities.
The PSE30G-AT PoE injector is compliant with IEEE 802.3af and IEEE802.3at standards. It auto-detects PD equipment, providing DC power to PoE devices. It is plug and play making it easy for network deployment. It has an output power consumption up to 30W.
The PSE30G-AT supports short-circuit protection. PSE30G-AT can auto-start short-circuit functions to cut off the power supply when the current is too high or your electricity is interrupted. This is to prevent equipment burnout and avoid networking failure.
Read our PoE white paper - Discusses PoE technology, what it's used for. How it works. Also discusses some of our PoE products.


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Meaning you need perhaps an extra item, splitter.

Camera
Gigabit ethernet cable(s)
PSU
Splitter

The cable conductor colours are not that important, but the pinouts are. So careful selection of the ethernet cables to suit the splitter seems the crucial aspect.

I_have_spoken

This is the camera I'm thinking of getting: https://www.use-ip.co.uk/hikvision-ds-2cd2442fwd-iw.html

Scroll down the page and the vendor has an option of bundling with a PoE injector

iamlucky18

I know but I wanted to know what it actually does and make sure the specifications match up. They do seem to. I've sent a couple of questions to the vendor so well see when they'll reply. In the meantime I'll do some more research, this is actually interesting stuff....

I_have_spoken

Have a look at wikipedia for how PoE works.

forgotmyname

What will you be using the camera for? Indoor only and with LEDs so if your thinking of pointint it out a window the reflected light from the camera may wash out any potential vision.

Cheap CMOS sensor not a CCD, 10metre range for the infra-red LEDs.

Only 20 frames per second max. Says 0 Lux but im guessing thats only with the LEDs on and within that 10M Range. What about when they are not on?

Seems a lot of money for what you get.

I see its actually closer to £100 elsewhere. Still seems a lot though.