Many applications require embedded systems or peripherals to be mounted remotely, while maintaining an Ethernet connection to a central host. The challenge then lies with powering these remote systems as traditional supply sources may not be readily available. Adding outlets or DC wiring can be expensive or technically impractical for these installations.
Power over Ethernet (PoE) provides a solution to the above and other system challenges by passing both electrical power and data over inexpensive, readily available CAT 5 cables. The IEEE 802.3at standard can deliver 25.5W of isolated power over a distance up to 100m (330ft) with additional standards being proposed to provide even more power in the future.
Key highlights of PoE installations include time and cost savings, reliability, ability to scale and flexibility.
Time and cost savings come from the fact that only the CAT 5 cable needs to be run to the remote device, saving labor costs and the time consuming installation of additional power wiring. Additionally, there are the material savings from not having to run additional power outlets throughout the network.
Power over Ethernet reduces the amount of wiring and potential power supply failures by minimizing the components in the network. Properly implemented PoE systems also improve reliability by allowing remote power cycling and short circuit protection for remote devices.
The PoE system is easier to scale and provides flexibility from initial installation and through the addition of nodes to the network. The placement of devices, such as wireless access points and cameras can be located in the ideal location for intended use, rather than relying on placement of electrical outlets.
WINSYSTEMS currently manufactures both PoE Power Sourcing Equipment (PSE) and Powered Device (PD) to support our line of products. These products include the PPM-GIGE-2-PoE, which can manage up to 30W PSE power and the PCM-PS397-PoE, which can extract up to 25W. Combined, they provide a complete PoE solution capable of running powerful remote systems, all from a single Ethernet cable.