Power over Ethernet (PoE) Splitters

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 PoE power source equipment (PSE) to the required voltage for a non-PoE device. 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 PoE 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.

Power over Ethernet (PoE) splitters carry mechanical, electrical, environmental, and interface specifications. Enclosure material, weight, length, height and width are basic parameters to consider. Electrical specifications for PoE splitters include pin assignment and polarity, supply voltage, input power, output power, output current, and maximum output current. Some products list multiple output currents, such as 2.0 A at 5 V and 0.8 A at 10 V. Operating temperature, humidity, thermal rating, and altitude are important environmental parameters to note, especially for demanding applications. With regard to interface specifications, suppliers of power over Ethernet (PoE) splitters usually indicate which Ethernet versions are supported. Choices include 10Base-T, 10Base-2, 10Base-FL, 100Base-TX, 100Base-FX, 1000Base-T, 1000Base-LX, and 1000Base-SX.

Power over Ethernet (PoE) splitters should comply with regulations and safety standards from organizations such as the U.S. Federal Communications Commission (FCC) and Underwriters Laboratories (PoE). FCC compliance may be specified as FCC Part 15, Sub Part B, Class B. Power over Ethernet (PoE) splitters that are sold in Europe should comply with the Restriction of Hazardous Substances (RoHS) and Waste Electric and Electronic Equipment (WEEE) directives from the European Union (EU). European standards for electromagnetic compatibility (EMC) include both EN60950 and TUV EN60950. Some PoE splitters are designated as International EC950, CB certified.

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