Power Over Ethernet Classes

Class 1 class 2 and class 3 devices require very low power low power and medium power respectively.

Power over ethernet classes. Power over ethernet technology poe is an ubiquitous technology for powering ethernet connected end equipments that may typically require licensed personnel to install such as connected lighting wireless access points 5g remote radio units and more. Three of them have been standardized by institute of electrical and elec. Before poe two connections an electrical connection and a network data connection would have been required in order to join devices like ip cameras to the network. The current is just enough to have each device start and do its operation.

It has been standardised by the ieee but there are also vendor implementations that are non standard. The main one to be aware of is passive poe. This allows a single cable to provide both data connection and electric power to devices such as wireless access points internet protocol cameras and voice over internet protocol phones. In 10 and 100base t ethernet two of these pairs are used for sending information and these are known as the data pairs.

This way data and electricity is carried by one cable rather than having separate power cord. How does poe work. Serving two purposes with one cable. Class 4 poe devices require a high amount of power and are only compatible with poe pses.

Power over ethernet poe technology sends 10 100 1000 mbps of data and 15w 30w 60w and up to 90w of power budget to devices over cat5e and cat6 ethernet cables for a maximum distance of 100m. 802 3af will still be employed by the majority of power over ethernet devices for the foreseeable future. 0 44 to 12 95w 2 45 w 1 225 w 1. There are several common techniques for transmitting power over ethernet cabling.

Classes 1 3 provide less power than the default and class 4 provides more power although this is only available to pds conforming to the ieee 802 3at standard. That s what power over ethernet poe can do. Power used by the pd 802 3af tolerated cable loss typical max cable loss 0 default 15 4 w 44 v to 57 v 0 350 a max. Network cables such as cat 5e and cat 6 comprise eight wires arranged as four twisted pairs.

Ieee 802 3af power over ethernet poe classifications power availability class usage minimum power out of pse supplied voltage current range of max. Class 0 is the default and provides a maximum of 15 4 w. Power over ethernet classes comparison chart power over ethernet poe technology offers electrical current for wired ethernet lans local area networks through ethernet cables. This training series offers both introductory topics as well as deeper technical trainings for those with advanced knowledge of poe design.

What is power over ethernet.