Power over Ethernet (PoE) Classes
Uvod
Power over Ethernet (PoE) is a technology that allows electrical power and data to be transmitted over Ethernet cables simultaneously. It simplifies the process of deploying and managing network devices by eliminating the need for separate power cables. PoE devices can be categorized into different classes based on the amount of power they require. In this article, we will explore the various classes of PoE and their specific applications.
Class 0 – Legacy
Class 0 represents the legacy PoE devices that do not comply with any standard. These devices receive power from the data wires of the Ethernet cable but do not adhere to any specific power requirements. Class 0 devices are typically older or non-compliant devices that were manufactured before the official PoE standards were established.
Class 1 – Low Power
Class 1 devices are low-power devices that require up to 3.84 watts of power. These devices include IP phones, wireless access points, and small sensors. They are designed for applications where power consumption is minimal.
Class 2 – Medium Power
Class 2 devices are medium-power devices that require up to 6.49 watts of power. These devices include video cameras, small displays, and video phones. They are commonly used in surveillance systems, conferencing solutions, and small media devices.
Class 3 – High Power
Class 3 devices are high-power devices that require up to 13 watts of power. These devices include larger displays, laptops, and thin clients. Class 3 devices are primarily used in business environments where more power is needed to support the operation of larger devices.
Class 4 – High Power Plus
Class 4 devices are high-power plus devices that require up to 25.5 watts of power. These devices include PTZ cameras, video conferencing systems, and access control devices. Class 4 devices are suitable for demanding applications that require a significant amount of power.
Zaključek
Power over Ethernet (PoE) technology offers a convenient solution for delivering power and data over Ethernet cables. The various classes of PoE devices ensure that different power requirements are met, allowing for a wide range of applications. From legacy devices to high-power plus devices, PoE classes cater to the specific power needs of different network devices. Understanding these classes will help network administrators select the appropriate PoE solution for their deployments.
