Power over Ethernet (PoE) is a way of transmitting data and power to networked devices. In the simplest terms, PoE uses a paired Ethernet cable to carry both Ethernet data and electrical power to a device. This can be useful for powering non-PoE devices such as security cameras or IP phones or when there are no nearby power outlets.
Several types of PoE devices are available, including PoE injectors, splitters, and switches. Read on as we go over everything you need to know about PoE injectors, including:
What they are.
What they do.
How they work.
The different types of PoE injectors.
What Is a PoE Injector?
A PoE injector is a device that transmits power over Ethernet cables. It can power network devices such as wireless access points, IP cameras, and VoIP phones. PoE injectors can also power various devices that require low-voltage DC power. These include security systems, traffic counters, and more.
A PoE injector canconvert electrical power from a standard AC outlet into a DC voltage that various devices can use. In other words, a PoE injector is a device that takes power from the network and distributes it to other network devices.
How Does a PoE Injector Work?
A PoE injector is a device that works by converting power from one form to another. The way it works is pretty simple: It takes AC electricity from an Ethernet cable and converts it into DC electricity most devices (i.e., computers, printers, etc.) need.
The DC power can then charge devices such as IP cameras, wireless access points, and VoIP phones. For example, if you want an Ethernet network port to power a device but don’t have any available, you can use a PoE injector to supply the necessary power.
It’s also useful for powering devices that run on low-voltage DC power sources like batteries or solar panels.
The Different Types of PoE Injectors
PoE injectors are one of the most important components in a network. Here are the three main types of PoE injectors:
Active PoE injectors have internal electronics that convert DC power from an outlet into AC power for data transmission via Ethernet cable.
Passive PoE injectors do not have any internal electronics; instead, they rely on a separate power supply to convert AC power from an outlet into DC power for data transmission via Ethernet cable.
12-24-48V voltage refers to the amount of voltage a device being powered by an active or passive PoE injector can use. Devices with lower voltage requirements will need fewer cables than devices with higher voltage requirements.
FAQs About PoE Injectors
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What kind of cable do I need to use?
You can use any category cable that’s compatible with your network equipment and your PoE injector. It’s best to consult your manufacturer to ensure you’re using the right cable for your needs, but most PoE injectors will work with CAT5e, CAT6, and CAT7 cables.
The cable length depends on your specific installation needs, but it should be at least 50 feet long.
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What is the difference between a PoE injector and a PoE switch?
A PoE injector doesn’t have its power source; it draws power from another device to distribute it over Ethernet cables. A PoE switch does have its own power source, typically 48 volts DC, and sends power over Ethernet cables based on commands other devices send on the network.
So, the main difference is that an injector requires power from an external source (like an outlet) while a switch itself has a built-in power supply.
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Are PoE injectors safe?
Yes! The voltage that runs through a PoE injector is low enough that it won’t cause any harm to your devices or people.
The amount of electrical current a PoE injector sends to your Ethernet cable is equal to or less than 1 amp, and even at 100 volts, that would be less than half of what you’d get from plugging something into an outlet at home.
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Are PoE injectors easy to install?
Yes, PoE injectors are relatively easy to install. You just need to make sure you have the right cables and an outlet near where you want them installed. Once they’re plugged in, they’re ready to go, a simple plug-and-play option to meet your PoE needs.
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What are the benefits of a PoE injector?
PoE injectors offer many benefits, including lower cost, higher reliability, and faster data transfer speeds. Here are just a few other benefits:
Easy installation: PoE injectors are easy to install and configure, so you don’t have to hire an expensive professional to do it for you. You can set up your network in minutes instead of days or weeks.
Flexible network expansion: You don’t have to worry about running out of ports or cables when you use a PoE injector because it uses Power over Ethernet (PoE) to expand your network. You can add new devices as needed without having to run new cables around the building or campus.
Time and money saving: A PoE injector reduces installation time because it doesn’t require any cabling — just plug in the device, power it up, and set up the IP address on each new device that needs access via Ethernet cable.
Things to Consider When Choosing a PoE Injector
There are three essential factors to consider when choosing a PoE injector:
The number of PDs: This refers to the number of ports on the PoE injector that can connect devices with PDs. You want at least one port per device you plan to power via PoE.
PoE port power supply: Each port on your PoE injector will have its own voltage and current output, so make sure you know what these values will be before buying an injector. Its standard must be compatible with the PD.
Power supply voltage: Power supply voltage refers to the amount of power supplied by each port; it should match your device’s requirements. You can find this information from the device manufacturer.
Parting Thoughts
The bottom line is this: PoE injectors are an essential tool for businesses and enterprises of all types. They can help you cut costs, increase productivity, and make your life easier in more ways than one.
Whether you’re a business looking for an easy way to extend your network or an enterprise looking for a more cost-effective way to power your network system, PoE injectors can help you get the job done.
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