7. DIGITAL BUILDING SOLUTIONS ON THE RISE The progressive development of PoE technology enables the power supply of a growing number of applications and services in buildings via data cables. Intelligent solutions based on PoE technology are becoming increasingly widespread. The most relevant applications in the context of “Smart Building” are PoE Lighting, PoE Emergency Lighting and IoT sensor networks. PoE Lighting For buildings of all sizes, PoE Lighting can be used as a flexible and at the same time sustainable lighting solution. Compared to conventional lighting systems, the smart concept scores with lower effort for installation, maintenance and operation as well as reduced energy consumption and CO2 emissions. The interaction of sensors, LED luminaires and intelligent control offers users attractive options for optimising operation. Since PoE Lighting is IP-based, the lighting gets intelligence. By connecting the control to the data network, the lighting can be easily automated. The light comes on automatically when it is needed and goes off again when there is no one in the room. This function ensures that lights are not left on overnight. Control via the data network further enables “Daylight Harvesting”. The LED lighting is able to supplement the daylight in the room to the desired illuminance at any time. The setpoint can be specified individually for each area and for each workstation. PoE versus DALI/KNX LED luminaires require significantly less power than conventional luminaires. However, LED luminaires only show their full potential in combination with appropriate sensors and an intelligent control system that quickly and automatically adjusts the illuminance to the respective requirements. In this way, a reduction in power consumption of over 70 percent is possible compared to conventional lighting. Conventional DALI/KNX lighting systems for this purpose are complex, limited in application options and associated with significantly higher costs for initial installation and operation. In addition, licensed electricians are required for installation. Ultimately, the installation of a DALI/KNX lighting solution requires more components and systems than PoE Lighting. 6. GENERAL BENEFITS OF PoE INFRASTRUCTURES The number of devices and services integrated into the network continues to increase. This is driven by the demand to standardise the cabling infrastructure. This is accompanied by the demand for standardization of the cabling infrastructure. The demand for intelligently networked buildings based on PoE has increased continuously over the last few years - both in the area of commercial and industrial end users. Ease of installation & maintenance PoE-compatible devices can be connected to the network without much effort and are self-configuring. Since only low voltage is used, no electricians are required for both implementation and maintenance. The installation of the network is highly standardized and verifiable according to the applicable installation standards. PoE reduces costs Users benefit from dual use through the Deployment of network cables for power supply, which can eliminate power cables, resulting in lower installation costs. In terms of operating costs, centralized management and standardized control of building applications with the associated automation options allows efficient optimizaComponents of a PoE Lighting system The components of an intelligent PoE lighting solution include a central power supply system, PoE switches and PoE drivers as well as the LED luminaires, the actual light sources. Various products are available here, some with very different quality characteristics. As far as the power supply system is concerned, users should pay particular attention to the quality of the following features when purchasing: • High performance • Certain number of power supplies to achieve the required overall performance • High efficiency • Universal mains input • Power supply technology for IT and TC •Business critical light redundancy • Exchangeability of power supply units during operation • Short circuit and overload protection PoE uses Cat.6A cabling, via which up to 72 W can be supplied to the consumer in conformity with the standard with a SELV <60VDC(Safety Extra Low Voltage). A 230V AC voltage is not necessary. A Cat.6A cabling can be equipped with a warranty period of over 25 years, which also supports the PoE lighting application. The LED luminaires in a PoE lighting system should provide flicker-free, color-tunable light for creating different lighting environments. PoE enables future-proof lighting solutions such as the data transmission technology VLC (Visible Light Communications), which transmits data or information using the medium of light. Lighting VLC technology is the basis for Li-Fi applications and indoor positioning systems (IPS), the development of which is currently progressing strongly. Upcoming system solutions can be easily integrated. By integrating with Building Management Systems (BMS), the lighting system can be operated and monitored cloud-based, which increases operational efficiency. PoE devices should support the open network protocol M QTT (Message Queuing Telemetry Transport) for this purpose. MQTT is a message protocol for low-bandwidth, high-latency networks. Therefore, it is ideally suited f or machine-to-machine (M2M) communication. In the IoT, MQTT is used up to the connection of cloud environments. tion approaches. In addition, the space requirements of PoE components are often significantly reduced compared to alternatives with conventional power supply. External power supplies often become redundant. In addition, system availability is improved. In the event of a power failure, uninterrupted operation of the connected devices can be guaranteed via PoE by using a UPS to back up the PoE switch. This is not only an invaluable advantage for a WLAN infrastructure Sustainability / Climate protection PoE via structured cabling systems with centralized management makes a valuable contribution to improving the energy efficiency of buildings, thereby reducing CO2 emissions. Wellbeing Another aspect is increasingly coming into focus: environmental conditions such as temperature, lighting conditions and air quality influence performance, work quality and ultimately the health of people in smart buildings. PoE can be used to set up and operate a sensor network that ensures optimal working conditions, for example, by regulating lighting, ventilation and air-conditioning technology. This improves both employee satisfaction and work performance. 8 9
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