Appendix (C): Power Over Ethernet; Power Comparison - Ganz ZNT1-H Series Installation Manual

ITC Series

APPENDIX (C): 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 is expensive to wire.

Power Comparison

Property
Available Power
Max. Power by PSE
Max. Current
Supported Cable
For proper activation of PoE, the Category 5 cable must be shorter than 100m and
conform the PoE standard.
With non-Power Sourcing Equipment (non-PSE)
When it is connected with non-PSE, the power adaptor should be connected.
With power adaptor
Connecting both PSE and power adaptor does not do any harm to the product.
Disconnecting PSE or power adaptor from device does not reboot the device as long
as either one is connected to the device.
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802.3af
12.95 W
15.40 W
350 mA
Category 3 or higher
ITC6500 Series Installation Guide
802.3at
25.50 W
34.20 W
600 mA
Category 5 or higher
ganzsecurity.com. 01/17