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W&T Ports and indicators
4.1 Supply voltage
Power for the W&T USB-Server can be provided either via PoE or
from an external power supply.
4.1.1 PoE supply
The model 53641 USB-Server is suitable for use in PoE
environments according to IEEE802.3af. Here the supply voltage
is brought in by the network infrastructure through the RJ45
terminal. The USB-Server supports both phantom power using
data pairs 1/2 and 3/6 as well as power thorugh the unused
wire pairs 4/5 and 7/8.
In order to enable power management for the supplying
components, the USB-Server identifies itself as a Power Class 3
device (power consumption from 6.49W to 12.95W).
4.1.2 External supply
As an alternative to PoE, the USB-Server can also be powered
through the plug-in screw terminal located on the underneath
of the housing. The DC voltage used must lie in the following
range:
• DC voltage: 24V (-10%) - 48V (+10%)
The input of the USB-Server is equipped with a bridge rectifier,
so that the polarity of the supply voltage is non-critical.
The current draw can be found in the technical appendix.
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