PixelPro GXi Series
ZN1-D4FN7 Installation Guide
03-2014-A
23
APPENDIX (B): POWER OVER ETHERNET
The Power over Ethernet (PoE) is designed to extract power from a conventional twisted pair
Category 5 Ethernet cable, conforming to the IEEE 802.3af Power-over-Ethernet (PoE) standard.
IEEE 802.3af allows for two power options for Category 5 cables.
The IEEE
802.3af-2003
standard allows up to 15.4 W of power the device. However, 12.95W is
the available power, as some power gets lost in the cable. The updated IEEE
802.3at-2009
(PoE+)
standard allows up to 25.5 W (Max 34.2 W) of power the device.
PoE has advantages over conventional power in such places where AC powers cannot be
reached or expensive to wire.
Note
i
For proper activation of PoE, the cable must be shorter than 100m and
conform the PoE standard.
PoE compatibility
With non-Power over Ethernet (non-PoE)
When it is connected with non-PoE, the power adaptor should be connected.
With power adaptor
Connecting both PoE and power adaptor does not do any harm to the product, but power
adaptor will be the only power source for the device as it has priority over PoE. In this case,
disconnecting power adaptor while it is operating will cause the device to reboot. And PoE will
be the power source for the device after the reboot.
Power Comparison
The PoE Property supported by the device is
802.3af
.
Property
802.3af
802.3at
Available Power
12.95 W
25.50 W
Max. Power by PSE
15.40 W
34.20 W
Max. Current
350 mA
600 mA
Recommended Cable
Category 5 and above
Category 5e and above
Note
i
Disconnecting PoE does not reboot the device as long as a power adaptor is
connected.
