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Nederlands (Nederland)PoE power and data over ethernet
Power over Ethernet (PoE) is a technology for wired local area networks (LANs) that allows power to be transferred over data cables. This makes it possible to power devices without connecting them to the mains through a power cable. PoE was once developed to power devices such as WiFi access points and IP phones. It makes access points easy and more flexible to use, especially in ceilings. Both power and data signal are transmitted from the powering device to the receiving device over the cable without interfering with each other. The main advantage of Power of Ethernet is the use of a single cable to transmit both power and data. A separate power adapter is therefore not needed. PoE is available in PoE switches and in a PoE injector. For powering a single device, a PoE injector is an economical solution.
• PoE (Type 1) for low-power devices
PoE uses two wire pairs to power low-consumption equipment. Based on the IEEE 802.3af-2003 standard, each port is supplied with up to 15.4W of DC power, of which a maximum of 12.95W remains for each device. PoE is used for devices such as VoIP phones, sensors, simple WiFi access points and security cameras that do not move (pan, tilt or zoom).
• PoE+ (Type 2) for higher-consumption devices
Devices with higher consumption use PoE+ standard, the IEEE 802.3at-2009. It is backwards compatible, meaning it also works with devices that support PoE. Each port is supplied with up to 30W DC power, of which a maximum of 25.5W remains for each device. PoE+ is used for advanced WiFi access points, more complex security cameras that also move (pan, tilt or zoom), LCS displays, biometric sensors and tablets.
• PoE++ (Type 3 and 4) for highest-consumption devices
A number of devices require more power to use PoE. These include video conferencing systems, building management systems or displays. The maximum powers for PoE++ type 3 is 60 watts and for PoE++ type 4 100 watts.
Use the right copper network cables
Apart from ensuring that the PoE switch can deliver the required power, it is also important to use the right network cables. These cables should feature 100% copper in order to be able to transmit the right amount of power.
