How many cameras can the monitoring 12v20 power adapter connect?

Hello, usually 2A 12V power supply can only take one camera.

One power cord can also supply power to multiple cameras, provided that the power adapter outputs enough current. It is suggested that the output current of the power supply supplying power to two cameras at the same time should not be less than 4A. It is recommended to read the instructions in detail to determine the current required by the camera. , independent power supply mode

Second, the centralized power supply mode

3.POE power supply mode (4 POE power supply modes)

What is the most taboo for network camera power configuration? What other problems should be paid attention to in the selection of network camera power supply? Precautions for camera installation!

I. Independent power supply mode

Advantages of independent power supply

Independent power supply is to install an independent security monitoring power supply at the front end of each camera, which only supplies power to one camera.

Independent power supply principle

1, simple maintenance and simple power supply replacement.

Because each camera has an independent security monitoring power supply, when the camera fails, it can quickly eliminate the faulty camera. If a failure caused by the safety monitoring power supply is detected, only a single failed power supply needs to be repaired and replaced.

2. Avoid paralysis of monitoring system.

Once there is a problem in the power supply system of centralized power supply mode, the whole monitoring system will not work normally and be paralyzed without UPS. In the independent power supply mode, one or several cameras can't work due to the failure of the security monitoring power supply, so as to avoid the paralysis of the monitoring system.

Insufficient independent power supply

1, the cost is too high

The sum of the costs of multiple independent security monitoring power supplies is generally higher than that of centralized power supplies with the same power output. This fee does not include cable charges.

2. The probability of being damaged by external force is higher.

Because the independent security monitoring power supply is often close to the camera, if it is outdoors, it is more vulnerable to external destructive factors such as sunlight, rain and lightning. Therefore, choose an independent security monitoring power supply dedicated for outdoor use, and pay special attention to the protective performance of the independent security monitoring power supply.

Second, the centralized power supply mode is for reference only.