1. The camera power supply indicates DC12V/AC24V universal. What kind of camera power supply should I choose? Answer: Choose AC24V surveillance camera power supply, because for the same transmission distance, the higher the voltage, the lower the loss. When the voltage is high, the load can get a sufficient voltage. At the same time, due to the use of AC 24V, power synchronization can be selected when debugging the camera, so that the image field frequencies of different devices in the entire monitoring system can be synchronized.

2. How to reasonably configure the camera power supply of the entire surveillance system? Answer: This problem often embarrassed young and inexperienced engineers. When implementing many schemes, it was found that the power capacity of the originally designed camera was not enough, and additional equipment was needed, which caused arguing with Party A. In fact, since the camera has a large startup current at the moment of startup, coupled with the loss of long-distance transmission in engineering, the power supply required by the camera is not simply the sum of the rated power of all cameras. The correct way is to add the rated power of the camera power supply of the entire surveillance system and multiply it by 1.3 times. This is the actual power required by the camera, and then add about 30% of the loss; finally add 30% of the margin, Used for future expansion. Example: If there are 100 fixed gun-type cameras in a commercial building, and the rated power of each camera is 4W, how do we configure the camera power supply? According to the above calculation method, we calculated that the rated power of the camera is 4W*100=400W. The actual power used by the camera is 400W*1.3=520W. After considering the loss, the power required by the camera is 520W*1.3=676W plus the power reserve. The power that the camera needs to configure is 676W*1.3=878W. Summarize as follows: The power that the camera needs to configure = the rated power of the camera*1.3*1.3*1.3 (Note: If the monitoring distance is particularly long, you need to increase the power supply appropriately. And increase the power supply voltage)

3. What is most taboo about the configuration of the camera's power supply? Answer: The most taboo thing is: the entire monitoring system shares one power supply. The reasons are as follows: 1) When the system is repaired, it is often necessary to turn the power on and off. All cameras start at the same time when the power is turned on. The starting current is extremely large, and the impact on the power supply is very large, and the power supply will be severely burned. 2) All cameras share a power supply. When the power supply fails, the entire closed-circuit monitoring system will fall into paralysis. Especially the images of some important entrances and exits cannot be monitored, which may cause unnecessary trouble. So what should be the correct approach? As in the above example, a commercial building has 100 fixed cameras, and a total of about 800W power supply is required. The correct configuration should be to select 4 power supplies, each with 200W power supply. In this way, when a certain power supply fails, the cameras at important entrances and exits can be connected to other good power supplies without affecting the operation of the entire system.

4. What issues should be paid attention to when choosing the power supply of the camera? Answer: First: When connecting the camera to the power supply, do not connect the farther camera and the closer camera to the same power supply. If it is connected to the same power supply, the power supply voltage is high, it will burn the camera at a close distance, the power supply is low, and the camera at a far distance will have no image. You should try to connect the farther camera to the same power source, and connect the closer camera to the same power source. Second: If the monitoring distance is too far, you need to configure a higher voltage camera power supply, such as 30V, 36V, etc., or even directly supply 220V AC power, and then transform the voltage to the front end