Welcome to today's blog, which will cover some of the specialist PoE solutions available at Mast Digital.
First of all, what is PoE?
PoE or Power over Ethernet is a term used to describe the process of injecting power over an Ethernet cable, to deliver not only the usual Data but also to power the network device attached.
There are many different types of PoE available, the most common voltage used (especially in CCTV) is 48V PoE. This blog will cover a variety of products that are either suitable for or provide 48V PoE.
Active / Passive PoE
'Active PoE' is a method of PoE that requires the device drawing power to have to actively ask for it. This means that a non-PoE device cannot be damaged by plugging into an active port as no power will be sent to the device.
There is another method of PoE called 'Passive PoE' which as you can guess from the name, will passively deliver power to any device that is connected. Be careful with passive PoE injectors as you could accidentally damage your Ethernet port if it is not made to handle power.
There are currently 4 PoE types - Type 1 / Type 2 / Type 3 / Type 4 or more commonly referred to as Standard PoE / PoE+ / PoE ++ / High-PoE respectively.
A term you may have heard before is 'standard PoE', this refers to 48V active PoE otherwise known as 802.3af (up to 15.4W) or Type 1. This type of PoE can deliver power up to 15.4W, while there is another commonly used standard called PoE+ / 802.3at / Type 2 which delivers up to 30W.
Standard PoE and PoE+ are the most commonly used versions while Type 3 (up to 60W) and Type 4 (up to 100W) are sometimes required for high current devices. Both Type 3 and Type 4 are also known as 802.3bt or high-PoE.
Okay so now we understand what PoE is and what the various standards are, let's highlight some PoE products that may be useful for solving an issue you've had or may have in the future.
Most installers will use PoE switches or the ports on the back of an NVR to provide PoE to their cameras. This is all well and good but what if you need a higher wattage or don't need more than a single output? This is where PoE injectors come in.
Injectors usually utilise passive PoE (as described above), the have an input and an output as well as a power socket. The input is for your LAN connection and the output is to feed your PoE device.
We have several versions available, an 802.3af PoE+ (30W) variant, and two 802.3bt versions - one plastic (60W) and one with a metal casing (65W).
PoE switch built for PTZs
Most PTZs have a high power requirement and so need a separate power supply or one of the injectors mentioned above. We have a PoE switch which combines the neatness of a switch with the power output of an injector.
The Smedz 65W port PoE switch is very much like a normal CCTV PoE switch except the first port has a maximum output of up to 65W. This means it is capable of powering almost any PTZ without the need for an additional injector which can be untidy in a rack/enclosure.
Have you ever had a customer ask for an extra camera in a location after the cables have already been run? What about a time when you have pulled through 2 cables but one turns out to be damaged and there's no option to re-run?
If you have experienced either of these issues then you know how this can be extremely frustrating. We have a couple of products that will be able to get you out of jail should you ever face this problem.
1 cable, 2 cameras - Cheap option
Quite self-explanatory; this unit will allow you to combine two PoE switch outputs into one then back again after your cable run - providing you with 2x RJ45 outputs with full data and power capabilities over a single cable.
Be aware: Due to the way Hikvision recorders deliver PoE, this unit will not function directly from the PoE ports on the back of an NVR.
1 cable, 2 cameras - Extender option
You can achieve a similar result to the 1into2 unit with our 2 port PoE extender - providing you with 2x RJ45 outputs with full data and power capabilities over a single cable.
Be aware: This extender requires the input to be PoE powered, it will work with both 802.3af/at but 802.3at (30W) is recommended to provide full functionality to both outputs.