PoE switch Various types of PoE network switches are currently available on the market. With the PoE switches, the network connection and the power supply of the PD (Powered Device) can be efficiently realized via the Ethernet cable. A PoE switch only requires a power cable for the switch and a network cable for connecting PDs. Then the PD can be plugged directly into the PoE Gigabit switch port for both data transmission and power supply. PoE switches with 8, 12, 24 or 48 ports are widely used. State-of-the-art for a PoE port is: – Support for IEEE802.3af, IEEE802.3at or IEEE802.3bt, 10/100/1000M adaptive and PoE features, 90 watts output power, port auto flip (Auto MDI/MDIX), link monitoring, irregular self-test and recovery – Flow Control, IEEE802.3x for full duplex mode and backpressure function for half duplex mode, lightning protection, Surge/General Mode 6KV and Differential Mode 4 KV, ESD: 8KV – Support for a 1 U rack installation PoE Driver PoE drivers are the third component required for PoE lighting solutions. They combine high-power LED lighting applications with PoE connectivity. As a PD device, they draw power from the PSE. Ideally, they have multiple independent outputs and draw power and control data from a single PoE network connection. As such, they offer exceptional flexibility and ease of installation. They are to be optimized to achieve smooth dimming and flicker-free lighting performance. Requirements: • Compact design for ceiling mounting • Support of the lighting control protocols RDM, Art-Net 3, sACN and MQTT • Monitoring and protection against short circuits and interruptions • LED current and voltage monitoring in real time • Linear and curved output options for each channel PoE Emergency Lighting We encounter mains-independent emergency lighting every day in ceilings, on walls or above doors in all kinds of places in public buildings, factories or company complexes. In emergency situations, when the power fails, it provides sufficient orientation for building evacuation. Escape routes are thus reliably marked. If the regular, mains-dependent lighting switches off, it can otherwise become dark very quickly and panic can break out. In order to be independent of the mains in the event of an emergency, emergency lighting is provided by means of a rechargeable battery or a power generator. From the time of the power failure, it must be possible to supply the emergency lighting independently of the mains for at least three hours. It is also important that the lighting is switched on immediately, i.e. a duty cycle <1s. PoE switches offer advantages in terms of the following aspects: 1. Flexibility: PoE switches in wide-area deployment eliminate the need for non-PoE switches, additional PSEs and extension cables and create great flexibility for additional PoE devices such as IP surveillance cameras or WLAN access points. 2. Simplicity: Without additional PSEs and installation points, the PoE switch simplifies the overall network installation. In addition, good PoE switches also enable Simple Network Management Protocol (SNMP), which provides an easier way to monitor and manage the switch. 3. Cost-effective: The PoE network switch eliminates the need for users to purchase and install additional power cords and outlets, resulting in significant savings in cost and time for installation and maintenance. The basis for the installation of emergency lighting is EN 1838 for applied lighting technology as well as around 30 other standards, regulations and directives, including for example ISO 30061:2007, CIS S 020/E:2007 or EN 50172 for emergency lighting systems. In addition to professional installation, these also stipulate regular maintenance. Emergency lighting must allow sufficient visual conditions so that people can leave the buildings quickly and safely. Emergency lighting today mostly works with LED and rechargeable battery. With LED emergency lighting, energy efficiency is a major advantage: the luminaire shines longer because the battery is used efficiently. In addition, LED requires less maintenance. Benefits of PoE Emergency Lighting In this area of application, too, an emergency lighting system via PoE offers many advantages over a conventional mains voltage supply. As with all other PoE applications, no electrician is required for installation. Emergency lighting components such as signs with illuminated walkers or spotlights for corridors and open areas are easy to implement via plug-and-play. In addition, synergies result from the use of already installed Ethernet data cables. The use of Cat.6A cables, for example, enables installation costs to be reduced by 80 percent. The officially required three-hour runtime is easily achieved with 3Ah LiFePO4 batteries. The support of software for self-display and self-testing enables remote monitoring and simplified maintenance. 10 11
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