8000045 TP-SW3G 60W Gigabit PoE Extender User Guide Rev 1 25-May-16 Page 4
PoE Extender Distances
Voltage drop across CAT5 cable is proportional to distance and load
at the end of a cable. It’s important to understand the losses involved.
802.3af devices will work down to 42VDC. Because of cable loss it is best
to start with a higher voltage at the PoE source so that by the end of the
cable there will be enough voltage to support your devices. A good high
power PoE source will provide 56VDC to 57VDC PoE voltage. You should
try to calculate so you have a minimum of 44VDC at the input to the
TP-SW3G PoE Extender.
With 100m of 24AWG CAT5e cable you can expect the following voltage
loss using 2 pair PoE power (Divide loss by 2 for 4 pair PoE):
Load
Voltage Loss
Load
Voltage Loss
12W
2.35V
48W
9.4V
16.8W
3.29V
60W
11.75V
24W
4.7V
8000045 TP-SW3G 60W Gigabit PoE Extender User Guide Rev 1 25-May-16 Page 1
TP-SW3G
60W Gigabit PoE / Ethernet Extender
Features
•
Compatible with IEEE802.3af and IEEE802.3at and IEEE802.3at 4Pair(60W)
•
Extends the range of PoE and Ethernet an additional 100 meters or more
•
No additional power supply is required
•
Automatically detects and protects equipment from being damaged by
incorrect installation
•
Full-rate network speed over the entire extended distance
•
Wall-Mount design and compatible with DIN rail adapters
•
Easy plug-and-play installation
•
EMI standards: complies with FCC, CE class B
Description
Typical Gigabit Ethernet communications are restricted to 100
meters of cable. To overcome this limitation, network installers can
simply connect a TP-SW3G Gigabit PoE Extender in-line with the PoE
powered Cat-5e or Cat-6 cable to extend the distance another 100
meters. By using multiple TP-SW3G Gigabit PoE Extenders, Ethernet
distances can be extended to 300 meters or more.
The TP-SW3G includes 2 output ports making it possible for two separate
802.3af/at devices to be powered over a single CAT5 cable from a PoE
switch or midspan power injector. This greatly simplifies installation and
allows for network expansion without the need to run additional cables.
