PoE CCTV biztonsági kamera tápellátása PoE kapcsolóval
Valószínűleg hallott már a PoE biztonsági kamerákról és azok kényelmes használatáról. A PoE biztonsági kamera tápellátást kaphat az Ethernet-kábelen keresztül (ezért hívják PoE-nek), ami azt jelenti, hogy nincs szükség kábelre a kamera tápellátásához.
Az adatok és a teljesítmény átvitele ugyanazon a hálózati kábelen keresztül történik. Ez egy nagyszerű funkció, mert kevesebb vezetéket kell vezetnie, megbízhatóbb, a telepítés tisztán fog kinézni, és megkönnyíti a dolgokat a nagyobb telepítéseknél. Ezenkívül nem kell foglalkoznia a tápegység dobozokkal.
A PoE kamerák egy PoE kapcsolóval táplálhatók, amely láncba köthető (összekapcsolható), hogy CCTV kamera hubként működjön, ami segít meghosszabbítani a futásokat. Ebben az útmutatóban bemutatjuk, hogyan kell bekapcsolni a PoE biztonsági kamerát PoE kapcsolóval. Egy teljes útmutató, amely elmagyarázza a CCTV rendszerek PoE funkcióit.
PoE biztonsági kamera táplálása PoE kapcsolón keresztül
Az alábbiakban egy teljes útmutató található a PoE-kapcsolók és a PoE-kamerák megértéséhez.
Mi az a PoE a biztonsági kamerákban?
A Power over Ethernet, rövidítve PoE, egy olyan technológia, amely leegyszerűsíti a vezetékezést azáltal, hogy egyetlen hálózati kábelen keresztül egyszerre küld adatokat és tápellátást. Ez egy forradalmi megoldás, amely segít a kamerák telepítésében. A fő ok, amiért a PoE funkció hasznos a 4K biztonsági kamerarendszerekben, az az, hogy a hálózati kábel (Ethernet) könnyebben futtatható és olcsóbb, mint a koaxiális kábel.
Nyilvánvaló, hogy mivel minden szükséges ugyanazon a kábelen keresztül történik, nem kell minden kamerához külön tápkábelt vezetni. A PoE funkciók használatával mindössze egyetlen kábelt kell lefuttatnia, és a kamera képes lesz rajta keresztül küldeni és fogadni az adatokat és az áramellátást.
Ráadásul a PoE használata nem befolyásolja a kamerarendszer felbontását, lehet 4K vagy bármilyen más felbontás. In fact, the highest camera resolutions are IP systems and, some of them, support PoE only and offer no option to power it via a separate power cable.
What is a PoE switch?
PoE switches are power devices with multi ports that are used to power up PoE security cameras. Actually, the number of cameras that can be powered is related to the number of ports on the PoE switch.
For example, if it’s a 4 port PoE switch, it means it has 4 powered Ethernet ports and the rest are up-link ports that don’t inject any power. Simply inspect the marks on the switch, if the port is PoE it will be marked as “PoE” or sometimes with a thunder icon.
The PoE switches are usually available on 4, 8, 16, 32, 64 ports, and using the gigalink ports you can daisy chain additional switches creating larger networks, or connect them to an NVR or a router. The options are endless, whatever the camera job requirements are, you’ll find a way to link them together in a convenient way.
Unmanaged or managed PoE switch for security cameras?
When researching PoE switches for your security camera system you may have landed on this dilemma:should you use managed or unmanaged PoE switches? A managed switch allows for more complex network configurations and adjustments and definitely requires a professional IT person to handle it.
On the other hand, unmanaged switches are basically Plug and Play which means there’s no need for additional configuration. These types of switches are easier to install and are ideal for any kind of home and small business installation.
If your project is relatively small (4-32 cameras) then you should go with unmanaged switch(s), make sure to purchase one that has good feedback from the customers. This how-to guide will refer to the unmanaged switches only.
Importing:Check the specs of your PoE switch before connecting the cameras
Be cautious to check out the specs of the PoE switch that you intend to use. There are various types of PoE switches that provide varying types of power and are designed for specific uses. Moreover, some specs may differ from one manufacturer to another one.
Make sure that you understand the power requirements of all your cameras and ensure that the chosen PoE switch can handle them. If not, it may cause serious damage to your devices.
The crucial spec that you need to look for is the so-called “passive PoE”. A passive PoE port will send out power via the Ethernet cable regardless of the other device power limitations/requirements.
In other words, if the protocol is not followed carefully, the PoE switch may send out more power than needed and fry the camera. For more information, consult this article:PoE Switch:The Difference Between Active PoE and Passive PoE.
Look out for compatible PoE switches that should be clearly labeled as 802.3af or 802.3at. It’s recommended to go with established switch manufacturers, switches that have good reviews and tested out properly. For example, Ubiquiti makes top-notch PoE switches .
Note: If the PoE switch or camera has no label stating 802.3af or 803.2at compliance, do NOT use it.
How to use a PoE switch with a PoE IP security camera
PoE switches feature the PoE ports at the back which are powered and marked as “PoE” and the unpowered ports known as uplink ports (sometimes called “gigalink” ports). Inspect the back of the PoE switch to understand the layout better, an example is shown below.
Steps on how to use a PoE switch with PoE security camera systems:
- Start by powering up the PoE switch, If the PoE switch comes with an external power supply, plug it into the outlet and the other end to the PoE switch. The switch will be ready for use the right way as it gets powered on.
- Use an Ethernet cable to connect the PoE camera to one of the PoE ports at the back of the switch. Usually, the PoE parts are labeled as such (either with a “PoE” inscription or with the power symbol). If no marks, then check the manual to see which ports support the PoE feature.
- Then, using the same cable, connect the other end to the RJ45 connector of the PoE security camera (on the camera’s pigtail). You may check if the activity lights at the PoE switch light up, if so, it means the connection was established. Note some connectors don’t come with activity lights.
- In the last step, you can network the PoE switch to the router, another switch, to an NVR, to a computer, etc. Use the up-link/giga-link ports offered by the PoE switch. Up-link ports can be used to daisy chain the PoE switch to another one and so on.
For illustrations, check the picture above. Pretty much that’s all. If the camera doesn’t power up, make sure the cables are terminated correctly, the RJ45 connector on the camera is good, ensure the connections are properly secured. Additionally, inspect the PoE switch to make sure it’s functioning correctly. Always go for reliable PoE switches .
Ways you can use a PoE switch with a PoE camera
PoE switches can be used with any devices that support the PoE feature. The most common situations where you can use a PoE security camera with a PoE switch:
- Connecting single/multiple security cameras (s) to the network
- Installing security camera systems across multiple buildings, even if they’re at some distance from each other.
- Troubleshooting IP camera systems (to see if the camera is receiving power)
- To configure IP cameras via a computer
- To expand the camera system and by using PoE switches is easier to add more devices
- You can use a PoE switch if you got a regular (non-PoE) NVR.