PoE Power Systems (Power over Ethernet)

PoE Technology: Data and Power over a Single Network Cable

PoE (Power over Ethernet) power delivery originated from the convergence of voice and data networks, allowing devices—termed PDs (Powered Devices)—to receive operating power over the very same Ethernet cable connecting them to the LAN infrastructure. This architecture eliminates the need for auxiliary AC outlets or costly dedicated electrical wiring runs near endpoint devices, substantially streamlining installation across telecommunications, IP surveillance, building automation, and industrial networking.

By adopting modern IEEE standards (802.3af PoE at 15.4W, 802.3at PoE+ up to 30W, and 802.3bt PoE++ / Ultra PoE up to 60W and 90W), current PoE technology can energize high-draw loads such as heated PTZ cameras, high-density Wi-Fi access points, HMI operator panels, advanced VoIP phones, and industrial IoT nodes.

Select the Ideal PoE Device for Your Network

The Power-Supply.it catalog features a broad range of power injection, conversion, and extension hardware, engineered to support any network topology:

• PoE Injectors: Compact units engineered to inject electrical power into an Ethernet cable originating from a non-PoE standard network switch. They offer the fastest, most economical method to power individual PDs without having to replace or upgrade existing network switches.
• PoE Splitters: Essential when integrating non-PoE native devices into a PoE infrastructure. The splitter separates incoming data signals from DC power, supplying regulated DC voltages (e.g., 5V, 12V, or 24V DC) at the output to run legacy cameras, sensors, or edge devices.
• PoE Midspans: Multi-port power hubs (available in desktop or 19″ rack-mount form factors) ideal for centralizing power distribution across high-density network deployments, ensuring stable operation and individual channel circuit protection.
• PoE Extenders (Repeaters): Devices designed to overcome the 100-meter physical distance barrier of copper twisted-pair Ethernet. They enable simultaneous transmission of data and power over additional hundreds of meters without requiring intermediate local AC drops.
• PoE Accessories: A complementary suite of dedicated DIN-rail power supplies, inline Ethernet surge protectors to shield network ports against transient spikes, and certified patch cabling.

Technical Consulting and Power Budget Sizing

Designing a robust PoE infrastructure demands accurate calculation of the total power budget delivered by the PSE (Power Sourcing Equipment), taking into account line voltage drops across extended cable runs and peak inrush current requirements of PDs. Our engineering team provides dedicated pre- and post-sales technical advisory:

• Standard compliance verification (IEEE 802.3af/at/bt and Passive PoE implementations).
• Sizing of industrial-grade injectors and splitters with wide operating temperature ratings for harsh operating environments.
• Configuration support and rapid dispatch from warehouse stock for compatible hardware and accessories.