Posts Tagged ‘POE Splitter’

Do I need a power over ethernet splitter?

Wednesday, June 10th, 2009

imgp2734It’s a simple question, so let’s try to provide a simple answer:

Many network devices such as network cameras, VOIP phones and wireless access points are POE ready. This simply means that they have the circuitry built within them to accept power supplied to them via the data cable. Therefore, they can be supplied with both power and data via a single network cable.

However, this does not mean that because a device is not ‘POE enabled’ it cannot be supplied via the advantageous single cable POE method!

If you use Power Over Ethernet, then (at the device end) use a POE splitter to separate the power from the data and present them to the device in the normal way e.g. RJ45 plug for the data and typically a barrel plug for the power, then the device is unaware of the fact that POE was used to reach it!

Some pitfalls to beware of:

  • Check that the POE Injector & Splitter you are using can supply the load that your device presents
  • It is best to err on the side of caution and use POE Injectors and Splitters from the same manufacturer
  • Check the voltage that your device needs; splitters are available for 3.3V, 5V, 9V, 12V, etc.
  • Check the power connector needed for your device; barrel connectors come in many different inner & outer diameters, and occasionally the opposite polarity …

More detail on many of these factors to follow in later articles, but we said we’d try to keep this one a simple answer to a simple question …

Your comments, feedback, queries and elaboration are always welcome …

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