Power over Ethernet (POE) - распиновка

разъем локальной сети

Power over Ethernet is a technology that allows IP telephones, wireless LAN Access Points, Security network cameras and other IP-based terminals to receive power, in parallel to data, over the existing CAT-5 Ethernet infrastructure without the need to make any modifications in it. Described by IEEE 802.3af standard.

PoE integrates data and power on the same wires, it keeps the structured cabling safe and does not interfere with concurrent network operation. PoE delivers 48v of DC power over unshielded twisted-pair wiring for terminals consuming less than 13 watts of power.

 

IEEE 802.3af standard POE pinout:
Pin Alternative A Alternative B Alternative C (Pavlabor)
1 Vport Positive   Vport Positive
2 Vport Positive   Vport Positive
3 Vport Negative   Vport Negative
4   Vport Positive Vport Positive
5   Vport Positive Vport Positive
6 Vport Negative   Vport Negative
7   Vport Negative Vport Negative
8   Vport Negative Vport Negative



POE pinouts from different manufacturers

STANDARD SOURCE LOAD REMARKS
  Ethernet RJ-45 connector pin number Load Voltage DC Load Connector  
Source Voltage 1 2 3 4 5 6 7 8
IEEE 802.3af
using data pairs
48 V DC, protected RX, DC+ RX, DC+ TX, DC- spare spare TX, DC- spare spare (embedded) Industry Standard for embedded PoE
IEEE 802.3af
using spare pairs
48 V DC, protected RX RX TX DC+ DC+ TX DC- DC- (embedded) Industry Standard for embedded PoE
Intel, Symbol, Orinoco Usually
12 or 24 V DC
RX RX TX DC+ DC+ TX DC- DC- (embedded) Most Brands of PoE
Cisco
(OLD old standard)
48 V DC RX RX TX DC- DC- TX DC+ DC+ (embedded) Older Cisco polarity is
REVERSED
Cisco
(NEW old standard)
48 V DC RX RX TX DC+ DC+ TX DC- DC- (embedded) New Cisco is IEEE compliant
D-Link (Adapter) 48 V DC RX RX TX DC+ DC+ TX DC- DC-

5VDC@2.5A
or 12VDC@1A

DC coaxial
5.5/2.5mm
D-Link PoE Adapter for non-PoE products.
Apple MacIntosh AirPort PoE, Extreme 48 V DC RX RX TX DC?? DC?? TX DC?? DC?? Converted to ??? DC coaxial
(???)
Mac Polarity Unknown
HyperLink Many DC Voltages Available RX RX TX DC+ DC+ TX DC- DC- same as input DC coaxial and others available Variety of Options Available to Fit Most Brands of PoE
NYC Wireless
"Roll Your Own"
12 or 24 or 48 V DC RX RX TX DC+ DC+ TX DC- DC- same as input DC coaxial
or as reqd
New York City Wireless PoE
3Com AirConnect 24 V DC RX RX TX spare spare TX DC+ DC-     3Com AirConnect wireless access points
Pavlabor 54 V DC, protected RX, DC+ RX, DC+ TX, DC- DC+ DC+ TX, DC- DC- DC- (combined) Industry Standard for embedded PoE

PoE - powered devices should obey following specifications:

Parameter   Pavlabor
Min Max Min Max
Signature Resistance, KOhm 23.75 26.25 23.75 26.25
Startup Time (till I>10mA), ms   300   100
Power Consumption, W   12.95   25.00
Operating Input Voltage Range, V 36 57 40 100
Must Turn on Voltage, V 44   40  
Must Turn off Voltage, V 30 V   25 V  
Input Current (@36Vdc), mA 10 350 15 600
Input Current, Peak, mA   400   900


8 pin RJ45 (8P8C) female connector layout

8 pin RJ45 (8P8C) female connector layout