Product Description - Model POE-EBU101
The AIR802 Model POE-EBU101 is an economical passive (pre-802.3af or non-compliant 802.3af) midspan power-over-Ethernet (PoE) injector. This model has two 8P8C Ethernet jacks plus a 5.5mm x 2.0mm DC input jack. The POE-EBU101 has a power LED, which will be green if power output is detected. One of the 8P8C jacks is labeled "DATA IN" and the other "P+DATA OUT".
Basic Power-over-Ethernet (PoE) Information
PoE offers great cost savings and flexibility in deploying equipment. If an AC outlet were required to be installed in attics, warehouses or on rooftops where wireless access points, IP cameras, etc., it would be very expensive. PoE allows the Ethernet network cable to carry the DC voltage from the injector installed possibly hundreds of feet away inside a building where AC outlets are available.
There are two basic types of power-over-Ethernet (PoE) devices. One is what we often refer to as pre-standard and has been in use prior to the IEEE 802.3af standard being developed and ratified. This type of PoE device delivers the power over the spare pairs (pins 4,5,7 and 8) of an CAT5, CAT5E or CAT6 type Ethernet network cable. It simply puts the provided voltage across the spare pairs in a 10/100 network cable. The switching power supply with model POEIJ-B, provides 48VDC. This pre-standard version of PoE is implemented in many different manufacturer's products. The chipset is lower cost than 802.3af compliant chipsets and can result in lower cost products. Additionally, with pre-standard 802.3af, power may be easily applied to an powered device (wireless access point, IP camera, etc.), using DC from a automobile battery, solar power, etc.
The other basic type of PoE is IEEE 802.3af compliance. This standard must be implemented in the powered sourcing equipment (PSE) and the powered device (PD). There are two different modes underneath the 802.3af standard. Mode A is to apply the power over the same data pairs (pins 1,2,3 and 6) as the data is being transported. This is true of both 10/100 and 1000BASE-T networks. Mode A is sometimes referred to as phantom power. Mode B allows the power to be carried over the spare pairs (pins 4,5,7 and 8). However, a pre-standard PSE or injector, even though they use power over the spare pairs, will not operate due with a 802.3af PD. This is due to various actions ocurring between the PSE and PD, such as detection, classification, etc. The PSE determines if Mode A or Mode B is to be used. AIR802 is not currently offering a 802.3af PoE injector.
Technically, there is a third scenario, which is that Cisco built 13 different various models of their equipment that is not compatible with either of the two basic type of PoE operation described above.
The IEEE is working on another standard, 802.3at, which will provide higher wattage than currently available in PoE products. If you have a need for other PoE injector types or power supplies then let us know and we will consider manufacturing them.
Applications
• IP Telephones
• WLAN Access Points
• Bluetooth Access Points
• IP Surveillance Cameras
• Data Collection, Time and Attendance Control
• HVAC and Lighting Controls
• Badge/Card Readers
• RFID
• 802.11
WLAN
Bridges
and CPE
• 802.16 WiMAX
|
DC Input Voltage |
48V +/-5%
*Applied from External Switching Adapter (90~264VAC) |
|
DC Output Voltage |
48V +/-5% |
|
Max Output Voltage |
0.4A Max. |
|
Over Current Protection |
Multi-Fuse Open (60Vdc, Ihold=0.75A, Itrip=1.5A) |
|
Operating Temperature |
0 C ~ +50 C |
|
Storage Temperature |
-20 C ~ +70 C |
|
Humidity |
Up to 90 % |
|
Dimensions |
54mm x 42.6mm x 26mm |
|
DC Input Jack Size |
5.5mm x 2.0mm |
| Pin |
Input |
Output |
Pin |
| 1 |
Tx (+) |
Tx (+) |
1 |
| 2 |
Tx (-) |
Tx (-) |
2 |
| 3 |
Rx (+) |
Rx (+) |
3 |
| 4 |
N.C. |
+48V |
4 |
| 5 |
N.C. |
+48V |
5 |
| 6 |
Rx (-) |
Rx (-) |
6 |
| 7 |
GND |
GND |
7 |
| 8 |
GND |
GND |
8 |
