RTC Series
RTC6500 Series Installation Guide
04-2017-A
www.rivatech.de
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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
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 or higher
Category 5 or higher
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.
Note
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Note
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