Description:
48V 0.5A PoE Injector Power Over Ethernet Adapter for Wireless Access Point for AP

What is POE?

POE (Power Over Ethernet) refers to the existing Ethernet Cat.5 cabling infrastructure don't do any changes，
transmit data signals for some based on IP terminal (e.g.，IP telephone，wireless LAN Access Point，webcams， etc.) ，
at the same time also provide such equipment with technology of D C Power supply.
The principle of POE  power supply through cable.
Standard category 5 reticle have four pair twisted-pair cable，but in l0M BASE-T and 100M BASE-T only use two of them.

Category	802.3af(POE)	8023.at(POE plugs)
Classification	0~3	0~4
Maximum current	350mA	600mA
PSE output voltage	44~57V D C	50~57V D C
PSE output power	≤15.4W	≤30W
PD input voltage	36~57V D C	42.5~57V D C
PD maximum power	12.95W	25.5W
Cabling requirements	unsteuctured	CAT-5e or better
Power supply cable line pair	2	2

The benefits of POE power supply:
1. The cost savings.Because it only need to install one cable rather than two.In many cases，
all need to install where is difficult to deploy AC power supply.
With the increase of the device connected to the Ethernet，
if do not need to provide the local power supply for equipment，
will greatly reduce the deployment cost，and simplify its manageability.

2. Easy to install and manage.Customers can automatically
and safely mixed use original equipment and POE equipment on the network，
able to coexist with the existing Ethernet cable.

3. Safety. POE power supply terminal equipment will only supply for the equipment needed power supply.
Only connected to the equipment needed power supply，Ethernet cable voltage will exist，
thus eliminating the risk of electric leakage on line.

4. Easy to manage network equipment.

IEEE80 2.3 af allows two usage:
1. Application of the free foot power supply， 4，5 foot connected are the anode， 7，8 feet connected are the cathode.
2. Application of the data feet power supply，add the D C power supply at the midpoint of the transmission transformer，
not affect the data transmission.In this way，line pair 1，2 and line pair 3，6 can be arbitrary polarity.

The standard does not allow apply the above two situations at the same time.
PSE (power supply equipment) can only provide a kind of usage，
but power application equipment PD must be able to adapt to the two cases.
 
Hardware specifications:
The shell material: ABS
Color: Black
Size: 80 x 45 x 37 mm
Input: 100V - 240V ， 50/60 hz
Output: D C48V ， 0.5 A
Use scope: actual test with full copper cable can reach to 100m distance
Mode of power supply: 45+ ， 78- (the vast majority of UBNT，for AP is in this power supply mode)
Input interface: Cable socket DATA IN
Output interface: Cable socket DATA!#!amp!*!POWER OUT

Package included:
1 x 48V 0.5A PoE Injector Power Over Ethernet Adapter