[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"article-what-is-a-poe-splitter-and-how-does-it-work":3},{"id":4,"slug":5,"title":6,"category":7,"summary":8,"tags":9,"publishTime":13,"views":14,"seoTitle":15,"seoDescription":16,"seoKeywords":17,"content":18},2,"what-is-a-poe-splitter-and-how-does-it-work","What Is a PoE Splitter and How Does It Work","products","Learn what a PoE splitter does, how it separates power and data, and how it steps PoE voltage down to 5V, 9V, 12V or 24V for non-PoE devices.",[10,11,12],"PoE splitter","non-PoE devices","voltage conversion","2026-05-08",13,"What Is a PoE Splitter and How Does It Work?","A PoE splitter separates power and data from one cable and outputs 5V, 9V, 12V or 24V to power non-PoE devices. Here is how it works.","PoE splitter, how PoE splitter works, non-PoE device power, 12V PoE splitter, 5V 9V 24V splitter, PD","\u003Cp>A PoE splitter is a small device that lets you power a non-PoE device from a PoE network connection. It takes the combined power-and-data signal arriving on a single Ethernet cable, separates the two, and presents a regular data link plus a stepped-down DC voltage that ordinary equipment can use. In effect, a splitter is the mirror image of a PoE injector: an injector adds power to a data link, while a splitter extracts it.\u003C\u002Fp>\u003Cimg src=\"\u002Fbrand\u002Fcustom\u002Fphotos\u002Fpoe-splitter.jpg\" alt=\"poe splitter\" loading=\"lazy\" \u002F>\n\u003Ch2>The Problem a Splitter Solves\u003C\u002Fh2>\n\u003Cp>Plenty of useful endpoints - older IP cameras, Wi-Fi routers, thin clients, digital signage, and IoT controllers - need both network connectivity and DC power, but were never designed to accept power over the Ethernet cable. Running a separate AC outlet to a ceiling, pole, or remote wall is expensive and sometimes impossible. A PoE splitter removes that constraint by drawing power from the central switch or injector, allowing a 12 V device to sit up to 100 meters (about 328 feet) from any outlet.\u003C\u002Fp>\n\u003Ch2>How a PoE Splitter Works\u003C\u002Fh2>\n\u003Cp>Internally, a splitter behaves as a powered device (PD) on the network side. Its operation can be broken into a few stages:\u003C\u002Fp>\n\u003Cul>\n\u003Cli>\u003Cstrong>Input:\u003C\u002Fstrong> A PoE-powered Ethernet cable plugs into the splitter's RJ45 input, carrying both data and a high DC voltage (nominally 48-56 V on standard systems).\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Negotiation (active splitters):\u003C\u002Fstrong> An IEEE-compliant splitter presents the 25 kΩ detection signature and a classification signature so the PSE recognizes it as a valid PD and authorizes power.\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Separation:\u003C\u002Fstrong> Internal circuitry splits the signal into two paths - a clean data path and a power path.\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Conversion:\u003C\u002Fstrong> A DC-DC converter (typically a buck regulator) steps the ~48 V input down to a stable, regulated output such as 5 V, 9 V, 12 V, or 24 V.\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Output:\u003C\u002Fstrong> Data exits on an RJ45 port to the device's network port, while regulated DC exits on a barrel jack or terminal to the device's power input.\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Cimg src=\"\u002Fbrand\u002Fnet\u002Fcables-switch.jpg\" alt=\"cables switch\" loading=\"lazy\" \u002F>\u003Ch2>Typical Output Voltages\u003C\u002Fh2>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\u003Cth>Output voltage\u003C\u002Fth>\u003Cth>Typical loads\u003C\u002Fth>\u003C\u002Ftr>\n\u003C\u002Fthead>\n\u003Ctbody>\n\u003Ctr>\u003Ctd>5 V\u003C\u002Ftd>\u003Ctd>Single-board computers, USB-powered IoT, small sensors\u003C\u002Ftd>\u003C\u002Ftr>\n\u003Ctr>\u003Ctd>9 V\u003C\u002Ftd>\u003Ctd>Some routers, audio devices, specialty modules\u003C\u002Ftd>\u003C\u002Ftr>\n\u003Ctr>\u003Ctd>12 V\u003C\u002Ftd>\u003Ctd>IP cameras, Wi-Fi routers\u002FAPs, small switches, signage players\u003C\u002Ftd>\u003C\u002Ftr>\n\u003Ctr>\u003Ctd>24 V\u003C\u002Ftd>\u003Ctd>Industrial controllers, some PTZ cameras, certain access points\u003C\u002Ftd>\u003C\u002Ftr>\n\u003C\u002Ftbody>\n\u003C\u002Ftable>\n\u003Ch2>Active vs Passive Splitters\u003C\u002Fh2>\n\u003Cp>An active, IEEE-compliant splitter performs the detection and classification handshake, so it works safely with standard 802.3af\u002Fat\u002Fbt switches and injectors. A passive splitter simply taps a fixed voltage that is already present on the line with no negotiation - it must be paired with a matching passive PoE source and the correct voltage, or it can damage equipment. For broad compatibility and safety, active splitters are the preferred choice in mixed B2B environments.\u003C\u002Fp>\n\u003Cimg src=\"\u002Fbrand\u002Fnet\u002Frj45-hand.jpg\" alt=\"rj45 hand\" loading=\"lazy\" \u002F>\u003Ch2>Common Use Cases\u003C\u002Fh2>\n\u003Cul>\n\u003Cli>\u003Cstrong>Surveillance:\u003C\u002Fstrong> Powering legacy 12 V IP cameras from a modern PoE switch without local outlets.\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Wireless:\u003C\u002Fstrong> Feeding wall- or ceiling-mounted access points and routers that ship with a 12 V adapter.\u003C\u002Fli>\n\u003Cli>\u003Cstrong>Digital signage and kiosks:\u003C\u002Fstrong> Centralizing power for displays and media players in retail and transport hubs.\u003C\u002Fli>\n\u003Cli>\u003Cstrong>IoT and edge devices:\u003C\u002Fstrong> Bringing single-cable power and data to sensors, gateways, and controllers in hard-to-wire locations.\u003C\u002Fli>\n\u003C\u002Ful>\n\u003Ch2>Why Not Just Use a Wall Adapter?\u003C\u002Fh2>\n\u003Cp>It is fair to ask why an installer would choose a splitter over a simple AC power adapter at the device. The answer is infrastructure economics. Running mains power to a ceiling, exterior wall, light pole, or factory gantry means hiring an electrician, pulling conduit, and often obtaining permits - per location. A PoE splitter instead reuses the structured cabling that already has to be there for data, drawing power from a switch that is typically in a secured, climate-controlled, and UPS-backed equipment room. That single change centralizes power, simplifies backup and monitoring, and removes dozens of failure-prone wall adapters scattered around a site.\u003C\u002Fp>\n\u003Ch2>Selecting and Deploying a Splitter\u003C\u002Fh2>\n\u003Cp>When specifying a splitter, confirm three things: the PoE standard of the upstream PSE (af\u002Fat\u002Fbt), the exact output voltage your device requires, and the current\u002Fwattage headroom needed. Also match the data rate - choose a gigabit splitter for 1000BASE-T links rather than a fast-Ethernet-only model. As a splitter manufacturer, we tailor output voltage, connector type, and power rating to the endpoint, so integrators can deploy a single cable run with confidence rather than improvising with mismatched adapters.\u003C\u002Fp>"]