How to Select Power over Ethernet (PoE) Splitters
Image Credit: GlobTek, Inc.
Power over Ethernet (PoE) splitters receive a unified PoE signal (data and power), and then separate the data and power onto two different lines for non-PoE devices. They can also transform a nominal direct current (DC) input from a PoE injector or other type of power source equipment (PSE) to the required voltage for a non-PoE device.
How PoE Splitters Work
This diagram shows the role of a PoE splitter in a network that includes both PoE products and non-PoE devices. Note the uses of PoE, DC power, and Ethernet.
Image Image Credit: Eusso Quality Networks
PoE Splitter Applications
Power over Ethernet (PoE) splitters are used with older network products which only accept power through their direct current (DC) jack and data through their RJ-45 jack. Many newer network devices comply with the IEEE 802.3af standard the Institute of Electrical and Electronics Engineers (IEEE) and can use a single RJ-45 jack for both data and power.
These powered devices (PD) do not require separate power cables for alternating current (AC), and can positioned away from wall outlets. In this way, PoE splitters enable network administrators to integrate newer, PoE-compliant equipment with older systems.
Product and Performance Specifications
The GlobalSpec SpecSearch database let industrial buyers specify PoE splitters by form factor and application. Products come in two form factors: integrated circuit (IC) and standalone module. Typical applications include the powering of access points, cameras and video equipment, midspan PSEs, RFID devices, routers, switches, and VoIP phones.
Performance specifications for PoE splitters cover important electrical parameters such as input voltage and frequency, output voltage and power, and operating temperature. Features include indicators, short circuit protection, temperature monitoring, and support for serial interfaces such as I2C.