Power over Ethernet (PoE) Connector Pinout - AllPinouts

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Connector rj45f.png
8 pin RJ45 (8P8C) female connector at the hub.


Connector rj45m.png
8 pin RJ45 (8P8C) male connector at the cable.


Power over Ethernet (PoE) is a technology, described by IEEE 802.3af standard, 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.

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.


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


POE pinouts from different manufacturers

STANDARD SOURCE LOAD REMARKS
Ethernet RJ-45 connector pin number
Source Voltage 1 2 3 4 5 6 7 8 Load Voltage DC Load Connector
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 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


PoE - powered devices should obey following specifications:

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


References



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