Stewart Connector: An Overview of Standards Changes for Type 3 and Type 4 PoE Applications

Power over Ethernet: Physical Phenomena Due To Electrical Contact Separation & Standards Update

2019 will usher in a new set of standards from the TIA, IEEE, IEC and NEC for type 3 and type 4 PoE applications. Bel Groups Stewart Connector walks through each of these changes with recommendations and information to keep your designs safe and compliant in the coming year.

Power over Ethernet describes the ability to provide power over the same twisted pair Ethernet connection that would otherwise transmit only data. Transmitting power and data through a single network connection reduces installation cost by eliminating the need to run a separate AC power source. PoE becomes even more advantageous when running power to remote locations without readily available AC power or when moving previously installed PoE powered equipment. The installation and rearrangement of powered  equipment is simplified to moving the equipment and plugging in the PoE powered Ethernet cable without the need of a licensed electrician.

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The coming IEEE 802.3bt standard will introduce higher power PoE up to a maximum of 100 watts allowing for an expansion of connectable devices. Devices with relatively high power requirements such as flat-panel displays, high power wireless access points, and desktop computers can now run on PoE systems.

In addition, since the PoE system operates with DC current a common uninterrupted power supply can provide continuous power to the terminal device during disruptions from the power grid. This feature allows critical emergency equipment such as alarms, cameras, and emergency lighting to remain operational when they are needed the most. 


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