Ethernet is a long-standing technology that has been used in a variety of applications to connect devices together. More recently, Ethernet has found a new application in the form of Power over Ethernet, or PoE. PoE allows Ethernet cables to carry both power and data simultaneously, providing a convenient and efficient way to deliver power to devices that require it.
PoE is particularly well-suited for devices that are located in hard-to-reach places or that need to be powered on a regular basis. Thanks to PoE, there’s no need to worry about finding a power outlet or running extension cords. Instead, all you need is a single Ethernet cable. And because PoE delivers power directly to the device, there’s no need for an adapter or power brick. This makes PoE an ideal solution for powering devices such as IP cameras, VoIP phones, and wireless access points.
How Power over Ethernet Works
Power over Ethernet works by combining power and data signals into a single Ethernet cable. The cable consists of four twisted pairs of wires, two of which are used for transmitting data and two of which are used for delivering power. The power pairs are typically carrying direct current (DC)voltage ranging from 7 to 48 volts.
PoE requires specialized equipment called an injector or midspan to work. The injector takes an AC voltage from a standard wall outlet and converts it into DC voltage that can be delivered through the Ethernet cable to the device. The injector is typically located near the main switch or router and can be used to power multiple devices.
There are two types of Power over Ethernet: Active PoE and Passive PoE. Active PoE uses an internal power supply within the device to convert the DC voltage delivered by the Ethernet cable into AC voltage that can be used by the device. Active PoE is typically used with devices that require higher voltages, such as 48 volts. Passive PoE relies on the device itself to provide the internal power supply needed to convert DC voltage into AC voltage. Passive PoE is typically used with lower-powered devices that require voltages ranging from 7 to 12 volts.
Power over Ethernet is a convenient and efficient way to deliver power to devices that require it. Thanks to PoE, there’s no need to worry about finding a power outlet or running extension cords—all you need is a single Ethernet cable. And because PoE delivers power directly to the device, there’s no need for an adapter or power brick either. If you’re looking for an easy way to provide power to your devices, then Power over Ethernet might be right for you!