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Power over Ethernet

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PoE describes power transmission over a standard cat 5/6 twisted pair cable, thus not only eliminating the need for a power line, but also allowing installation by amateurs due to the safe low voltage.

 

Meanwhile, PoE is used in a wide variety of applications, though it is most commonly found in safety and protection instal ations, access control systems, and VoIP phones, offering a significant cost benefit through the elimination of decentralized mains supplies.

Subcategories of Power over Ethernet:

Produktkategorie Desktop, Plugtop

Desktop, Plugtop

For your choice!

 
Produktkategorie Ethernet

Ethernet

Components for Ethernet-based Applications

 
Produktkategorie Midspans

Midspans

Available in different classes!

 
Produktkategorie PCB Modules (PSE, PD)

PCB Modules (PSE, PD)

Available in different packages!

 
Produktkategorie PoE - Power over Ethernet

PoE - Power over Ethernet

Power transmission over a standard cat 5/6 twisted pair cable

 

Order now: Samples Power over Ethernet

TIME-TO-MARKET: You can find the latest evaluation boards and samples in our shop. So that you do not lose any valuable time.

PoE describes power transmission over a standard cat 5/6 twisted pair cable, thus not only eliminating the need for a power line, but also allowing installation by amateurs due to the safe low voltage.

 

PoE works with voltages below 60 V and is thus considered SELV (safety extra low voltage). A distinction is made between injectors (PSE – power sourcing equipment), which can in turn be designed as midspan or endspan, and consumers (PD- powered device). Midspans use the spare pairs 4|5 und 7|8, endspans transmit power only over the data line pairs 1|2 und 3| 6. As a rule, IEEE defines two power classes: IEEE802.3af (15.4 W per port), IEEE802.3at (30W per port). In addition, there are two special classes: ultra and mega PoE with 60W and 95W respectively per port.

 

It is possible for ageing networks to apply power to an existing ethernet switch using midspan hubs. There are 4,8,16 and more channels to choose from here, with outputs of up to 60 W per port, mostly available as 19" rack units with 1U height, but also as a desktop version. Simple injectors are usually available as a desktop power supply with an IEC320-C14 connector, or as a circuit board module. 90% of splitters or PDs are implemented as circuit board versions.

 

One can choose between different packages such as SIL, DIL and SMT. PoE or even active PoE requires a consumer's signature before making power available. Besides, it is also possible to classify the power provided (so-called class programming). To receive the power supply, it is always necessary to obtain a "power signature" (minimum load). The supply of PSE modules is often problematic, as they require a voltage of at least 48Vdc. This, however, is not a common board voltage, so that in addition to pure PSE modules, complementary products such as, e.g. DC/DC converters from 12 or 24 to 50V+ are also available.

 

Meanwhile, PoE is used in a wide variety of applications, though it is most commonly found in safety and protection instal ations, access control systems, and VoIP phones, offering a significant cost benefit through the elimination of decentralized mains supplies.

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