Next Generation PoE - What You Need to Know

August 23, 2018 at 8:00 AM

 
What’s better than Power over Ethernet? More Power over Ethernet (PoE), of course – and that is exactly what PoE++ is delivering. PoE++ expands upon the traditional PoE benefits of delivering data and power over a single Ethernet cable, it increases power capabilities and extends PoE’s reach into new industries and applications. Here, we’ll tell you exactly what gives PoE++ those two extras plus signs.
 
First, let’s look at a numbers comparison. The first ratified PoE standard 802.3af supports 15.44 watts of power, but power dissipation usually lowers that number to a reliable 12.95 watts. Then PoE+ was introduced and bolstered power to 30.8 watts with the 802.3at standard, though power dissipation usually takes its toll and lowers power to 25.5 watts. PoE++ (the 802.3bt standard) will be capable of supplying more than 3 times the power of PoE+ with up to 100 watts (Type 4) of DC power and the ability to support 10 Gbps connections.
 
Traditionally, PoE has been used in networking applications. With PoE++, the technology’s reach is extended to include healthcare, point of sale, financial and surveillance industry applications. PoE++ utilizes all four twisted pairs of an Ethernet cable for optimal power transmission. It consists of Mode A and Mode B, and combines them to reach higher voltage levels. Mode A is also referred to as Type A, Type 3 or 4-pair PoE. It is specified for 60W, 50W reliable, and is able to support technology such as access controls, point of sale readers, IP cameras and nurse call devices. Mode B is also known as Type B, Type 4 or higher-power PoE. It is designed for 100 watts of power, 80 watts after power dissipation, and increases the capabilities to also include support of videoconferencing systems, laptops, desktops and televisions.
 
PoE++ is slated to bring more power, more conveniently to more devices than ever before. With all of the speed, convenience and capabilities that this new technology offers, it’s no wonder that PoE++ earned those extra plus marks.

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