Power over Ethernet (PoE) is a practical and convenient method to stream both power and network connectivity on the same cable. As it develops, inventors have to struggle with backward and forward compatibility, cable selection, and configuration selection and choose the right interface ICs. The ICs must not have the essential PoE functionality, designers are looking to endure the current features to protect safe power delivery.
PoE is primarily used in registered Voice over Internet Protocol (VoIP) systems established by Cisco in the year 2000 and the new generation of PoE technology and standards involved the specifications of a higher power. Simultaneously, LED luminaire efficacies had enhanced every year by 2017, where around 30W limit of outdated IEEE had sufficed to control nearly a quarter of the indoor luminaries.
The IEEE standard, authorized by the IEEE Standards Association Board involves the substantial improvements for the systems of LED lighting. The main factor responsible for the enhancement is the requirement for around 95W of the delivered power for the length of cable of up to 100m by using the four pairs of wires. This enables for daisy chaining of various luminaries that can shorten the procedure of installation.
Different developments in the new specifications involve enhanced efficacy for the PoE levels of delivered power as the power loss in the cable is decreased to half. For instance, operating of the power sourcing equipment in the previous standard required to provide less than 35W to make sure that the power device gets around 30W as 4.6W can vanish in the Ethernet cable. Operating the same device in the new standard will decrease the losses to around 2.26W, interpreting to around 8% of increase in efficacy.
Additionally, the equipment of power sourcing has the potential to recognize the maximum power strained by the connected device and establish the distributed power, bringing about the enhanced system of operation. Previously, the backup power requirements were lower because of the decrease of the essential duty cycle of the power signature signal, with around 0.03W needed to maintain the powered connection. As energy efficacy is the most convincing selling point for LED lighting systems where the changes in new spec assist in making the case for PoE control systems.
PoE achieves more than the simplifying deployment. PoE helps in connecting the LED light sources to the internet and provides the user access to “Smart Lighting”. Smart Lighting allows users to distantly control the lighting systems through the mobile client device by means of the internet.
Distinct IoT devices are operating with Zigbee and Z-wave home automation standard where PoE LED lighting do not need the home gateway for operating. PoE LED lights obtain their own IP address after connecting to the LAN network through Ethernet cable. This creates the PoE LED lights ready for home automation and enterprise use.
Advantages of having PoE powered “Intelligent Building”
“The advantages on the LED side of things is that it is cost-effective in terms of installation with one connection rather than two and tunable LEDs on PoE can be accustomed for brightness, usage and hue. Different devices such as digital signage, robotic arms in medical applications and HD security cameras can be controlled effectively with PoE”.
The other benefit is that the technology fueling the connected devices of the facility are now controlled and maintained with the electrical closet. “The part of PoE is altering inside the building. The closet of electricity becomes the backbone of the facility and occupied with cable that powers and controls security, networking, data, phones, lighting, cabling and racking”.