Increased Heat Build-Up on Network Cables

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The new generation of power supply via local data networks (remote powering) should enable a supply of up to 100 watts, which is four to five times greater than the current rate. 4PPoE allows more powerful terminal equipment to be supplied with energy via network cables. Parallel power cabling is therefore no longer required. However, the twisted-pair copper cables heat up during the supply process, leading to an increase in attenuation. This must be taken into account from the very beginning of a cabling project, which in turn poses new challenges when installing data networks.

In a recently published White Paper, R&M provides information on the physical backgrounds. The document contains practical information for network planners and installers on how to prevent the cables from suffering critical temperature increases, thereby avoiding the resulting loss of power in the structural cabling when using 4-pair Power over Ethernet.

At the same time, R&M is introducing a specially developed PoE calculator, which takes into account all relevant factors, such as cable types and ambient air temperature. The maximum link length of the cabling and the appropriate cable categories can be determined by entering just a few values into the spreadsheet:
http://www.rdm.com/en/co/service/planungshilfsmittel/power-over-ethernet-calculator.aspx

For more information abut R&M products, please visit www.rdm.com/en/co/products/power-over-ethernet.aspx

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