PD:Current events

1. The camera marked DC12V/AC24V general, this choose what kind of power.

Choose AC24V monitoring power, because of the same transmission distance, the higher the voltage, the smaller the loss. High voltage, load can get sufficient voltage. At the same time, because of the exchange 24 V in use, when debug the camera, we can choose the power in synchronization,which make the whole security cameras systems of different equipment to keep pace with the image.

2. How to deploy the whole monitoring system of the camera power reasonablely?

This question always the young and inexperiece engineers feel awkward,many project are found at the beginning of design that the power capacity is not enough, the power capacity required additional equipment, which cause a dispute over trifles  with the first party.In fact, because when camera  starts which make a big starting current , what is more because of project  long-distance transmission loss, so the power of the camera is not simplely put all camera power rating of adding together. The right way is to put the whole monitoring department, CCTV cameras power rating of 1.3 times again multiply together, this is the power of the camera actual need, then add about 30% of the loss; Finally plus 30% of the allowance for future useand expansion.

3.What’s the most taboo of the camera power configuration?

The most taboo is the whole security system using one power source.The reasons are as following:

1)When maitain the system,often need to open and shut of the power.All the cameras turn on the power at the same time launch , starting current particularly large which make a big impact force on power, for power, seriously it can  burn down the power supply,

2) A ll the cameras share one power supply, when the power supply break down, the whole closed-circuit monitoring system will be paralyzed. Especially a few important gateway image can’t monitor, which may cause unnecessary trouble.

So what should be the right way? For example, a commercial floor has 100 fixed cameras  that need about 800 W power supply, the correct configuration should choose 4 sets per 200. In that way, when a power fails, we can put the important gateways from other good power supply on camera, so do not affect the entire system.

4. The choice of the home video surveillance systems power still need to pay attention to what problem?

When connect power in camera, don’t put the  further distance camera and colser distance camera on the same power supply. If put on the same power supply, the power supply voltage high that will burn down the closer camera,while the power supply power supply is low, the further one can’t catch the image.

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