Ganz ZN-PTZ202XE Installation Manual - page 18
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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: For proper activation of 12V PoE, the Category 5 cable must be shorter than 140m and
conform the PoE standard.
PoE compatibility
With non-Power Sourcing Equipment (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, but power
adaptor will be the only power source for the device as it has priority over PSE. 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
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
Supported Cable
Category 3 and 5
Category 5
Note
i
Disconnecting PSE or PoE does not reboot the device as long as a power adaptor is
connected.
ZN-PTZ202XE Installation Guide