How to choose a power supply for a video surveillance system.

Today we will cover how to choose a power supply for a video surveillance system and how they differ.
In terms of voltages, all AHD video surveillance systems 99% support 12 volts. They differ mainly in terms of amperage. There are power supplies for 1, 2, 3, 4, 5, etc. amps What you need to remember? Something to remember is that the more CCTV cameras you have, the higher the amperage should be. At the same time, each camera has its own current consumption, this parameter is specified in the characteristics of the equipment.
Also you need to remember the further you have a cable in your video surveillance system, the amperage should be higher. If we are talking about a video surveillance system for 8 cameras and the average length of cables, (30 meters to each camera), we will be enough power supply 5 amp version. If the cable will be longer, there may be a loss of quality. In order to avoid it, there are several options. We can put a power supply with a higher amperage, for example, 10 amperes – this is already, but so to speak, more rare power supply. They are available, including us, but they are more rare. We can also power distant cameras closer to the source. That is, roughly speaking, we have 150 meters to the far camera, we can pull a coaxial cable and connect it to the recorder. From the power supply to do directly somewhere near the camera, that is, if there is such an opportunity. But in this way we will avoid loss of quality, avoid unnecessary expenses on a power supply unit with higher amperage.
All recorders are supplied with a power supply. If we choose some small video surveillance system for 2, 4, 3 cameras, we will be enough 2 amp version, in most cases, even enough power supply for 1 amp.

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