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What is the POE (Power over Ethernet)?

POE is Power over Ethernet that is a relatively new technology lets network cables carry electrical power. PoE technology is regulated in a standard known as IEEE 802.3af and is designed to ensure that data communication performance is not hindered. Power is delivered over an existing LAN infrastructure and is automatically activated when a compatible terminal us identified. Source from…

In 2003, the IEEE established 802.3af PoE standard, upgraded to 802.3at in 2009. 802.3at distinguishes between the first type (prior 802.3af) and the second type with maximum transmitted power of 30 W, nearly two times higher. The second type is suitable to power cameras with high-power IR illuminators, IP telephones, small network printers etc.

Comparison of the two types of PoE:

Feature/standard	802.3af (802.3at type 1 )	802.3at type 2 (POE+)
Output power of power supply [W]	15.40	30.00*
Minimum power available for the powered device [W]	12.95	25.5*
Output voltage of power supply [V]	44…57	50…57
Supplying voltage available at the powered device [V]	37…57	42.5…57
Max current [mA]	350	600
Ethernet compatibility	10BASE-T, 100BASE-TX and 1000BASE-T	10BASE-T, 100BASE-TX and 1000BASE-T
Range [m]	100	100
Cabling	UTP/FTP min. cat. 3	UTP/FTP min. cat. 5

Why use POE?

Specifying Power over Ethernet brings many advantages to an installation:

Time and cost savings – by reducing the time and expense of having electrical power cabling installed. Network cables do not require a qualified electrician to fit them, and can be located anywhere.
Flexibility – without being tethered to an electrical outlet, devices such as IP cameras and wireless access points can be located wherever they are needed most, and repositioned easily if required.
Safety – POE delivery is intelligent, and designed to protect network equipment from overload, underpowering, or incorrect installation.
Reliability – POE power comes from a central and universally compatible source, rather than a collection of distributed wall adapters. It can be backed-up by an uninterruptible power supply, or controlled to easily disable or reset devices.
Scalability – having power available on the network means that installation and distribution of network connections is simple and effective.

–Source from

How POE works?

PoE uses an Ethernet cable to deliver both power and or data to a device. That means the cable which runs from your network or router can be used to power a device, or alternately a power plug can also offer a PoE Ethernet port which then transfers power to a device.

These days Ethernet cables are also commonly fitted into the walls of buildings during construction, and if they aren’t they can be easily retrofitted.

That Ethernet cable is then fed into an adaptor to transfer the power supply into the correct-styled port of a device such as an iPad lightning charger, USB charging, or USB-C etc.

–Source from

Application of POE

POE has many applications, but the three key areas are:

VoIP phones – the original POE application. Using POE means phones have a single connection to a wall socket, and can be remotely powered down, just like with the older analog systems.
IP cameras – POE is now ubiquitous on networked surveillance cameras, where it enables fast deployment and easy repositioning.
Wireless – Wifi and Bluetooth APs and RFID readers are commonly PoE-compatible, to allow remote location away from AC outlets, and relocation following site surveys.

What is the POE tablet?

Whether you have an iPad-based information kiosk, or a wall-mounted tablet as part of your Point of Sale, PoE allows you to easily connect that device to a power supply, without requiring an AC/DC outlet.

The cable is simply fed through the wall from an IEEE 802.3af switch or injector that converts power to PoE (Power over Ethernet), then out via a tiny hole.

The tablet is then mounted to the wall using an iPad wall mount such as the Hub tablet wall mount, with a PoE adaptor used to convert the cable from Ethernet to lightning charger.

No electrician is required, allowing for simple affordable installation and greater mobility.

Raypodo POE Tablet

Raypodo POE tablet works with POE switch power supply which support PoE 802.3af and 802.3at. Here recommend use PoE 802.3af, if more than 10 tablet need light up together, we suggest use PoE 802.3at POE switch power supply, because the POE 802.3at is more powerful than 802.3af.

poe switch power

Not suggest to use with POE switch power standard 802.3bt. That would make tablet more heat.

POE Tablet

Raypodo POE tablet built in Rockchip RK3368,RK3566, RK3568 RK3288,RK3399 chipset and built in POE module that meet customer demand request. Raypodo tablet used for school, university meeting room, smart home automation and Villa project. If you need Allwinner chipset poe tablet, such as Allwinner A133, please contact our sales.

Raypodo has 7 inch, 10.1 inch, 11 inch, 13.3 inch and 15.6 inch VESA wall mount PoE tablet.