PoE: Concentrated Power

PoE (Power over Ethernet) continues to gain ground. Analysts are predicting high growth for the technology. According to Grand View Research, the market for global PoE chipsets will grow from $464.8 million in 2017 to $1.22 billion in 2025. Dell’Oro confirms the trend.

The analyst firm expects to implement over 750 million PoE-enabled PSE switch ports by the end of 2020. Network cables, which are capable of transmitting more and more power, support the trend.

The use of PoE is worthwhile

Companies benefit from many advantages. Because PoE transmits power and data over a single cable, they save the cost of purchasing and operating additional cabling. PoE injectors or switches/hubs serve as power sources.

Most devices on the market now have Ethernet switches. This makes it possible to install devices independent of the power supply system. Especially at installation locations where power lines are difficult or impossible to lay, such a procedure is very advantageous.

Thanks to PoE, separate power connections are no longer necessary and the effort for the installation of network devices is reduced. Companies often use the technology to power remote devices such as webcams,

surveillance cameras or WLAN access points, which are often installed in inaccessible places. Another advantage of PoE is the increased reliability of the connected devices via a central and uninterruptible power supply (UPS). In the event of a power failure, continuous operation is possible. PoE works with direct current. AC/DC conversion adapters are not required, resulting in energy and cost savings.

Draka cable right at the front

PoE is defined in several standards and enables different maximum possible performances depending on the standard. The table gives an overview. Electricians and planners will find all details for a successful PoE installation.

From Cat.5e to Cat.8.2, all categories support the PoE standards 802.3af, at and bt. But not with the same efficiency. Draka Cat.7a, Cat.8.2 and Cat.7 long reach cables in AWG22, for example, offer maximum PoE efficiency increases with outputs between 72 and 90 watts. Thanks to the high transferable outputs, these cables can also be used to supply power to larger end devices such as IP TV sets in Full HD or thin clients.

The transmission characteristics of Draka cables result in the lowest power dissipation and cable heating and provide the highest energy performance at maximum cable operating temperature. They are the means of choice for connecting additional devices and systems.

Cable manufacturers are continually working to improve the PoE performance of network data cables, as the limited power output associated with PoE remains the biggest drawback.