What Is PoE?
Developed in 2003, PoE stands for Power over Ethernet — in simple words, this means connecting devices to a network via ethernet cables. This type of connection allows devices to transmit both electric power (to operate other devices) and data at the same time through a single cable. It’s often used in industrial, consumer, and IoT (Internet-of-things) electronics. Among these, some of the most common types of PoE applications include IP cameras, smart home products, VoIP (Voice over Internet Protocol) phones, and wireless access points (such as those required for IoT). The PoE system is also becoming more common with the emergence of Industry 4.0 and the growing popularity of IoT.
How Does PoE Work?
Without getting too technical, here’s how PoE systems work: it involves a power source (otherwise known as Power Sourcing Equipment or PSE) and devices that will be powered by that source (otherwise known as Powered Devices or PD). These devices function when they are connected together through ethernet cables.
Depending on the power levels, PoE standards may vary. These standards are defined by the Institute of Electrical and Electronics Engineers (IEEE). The general rule of thumb is that PSE devices can power PD devices with a power level that is either equal to or lower than the power source. Therefore, when choosing your power source or PSE device, it must be based on the requirements of the downstream PD devices.
What Are the Benefits of Using PoE?
Easy installation — PoE systems are incredibly simple to deploy. Thanks to the minimal wiring it requires, it’s likely that components needed to create a PoE system are already in place. Even with older devices that do not have built-in PoE capabilities, you can use PoE splitter devices to act as the downstream PD devices. Whether it’s being used for small or large-scale deployments, PoE systems can be easily adjusted to fit your needs and provide a single-cable solution for powering smart devices.
Lower overall costs — On top of minimal wiring requirements, PoE systems help save costs in the long run due to their energy-efficient infrastructure. This is especially beneficial for large-scale deployments that use hundreds of devices. Ethernet cabling is also cheaper than typical electrical wiring while providing double the capability by transmitting both power and data with one cable.
Simple system integration — PoE systems allow for easier network integration because of their ability to provide a power supply. This means you can deploy and power devices in locations that are lacking in power outlets or electrical circuits, as long as the devices used in the network meet the proper power requirements. When being used with IoT networks, you can also use a PoE injector to connect both PoE-enabled and non-PoE devices to a LAN network switch. This way, you can combine both power and network connectivity.
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