Saturday, January 12, 2013

About Power Source for Cameras

<12VDC>

Most mini cameras and board cameras, as well as 1/3” professional CCTV cameras use 12VDC, 100mA to 200mA for B/W cameras and 150mA to 300mA for color cameras. In order to accept DC power plugs, these cameras are designed to have DC jacks. You should pay attention to the polarity (negative and positive) for power source. 12VDC power could be provided by AC Adapter or battery pack. A "power cord" plugged to the cigarette lighter in the vehicle should be used.

<24VAC>

About 2/3 of the professional cameras use 24VAC, 20VA to 40VA. Normally, the cameras have screw type connections, so you don't be concerned with the polarity. Given the power provided by AC Adapter, you need separate power cable for connection. For 24VAC power, the max transmission range is up to 450ft, meanwhile, it is very suitable for cameras which only can be installed outdoor and no outlet nearby.

< DIN Cable>

When using DIN cable to connect a camera and a monitor like in most "observation system*", the power(usually 12VDC) comes from the monitor so you can don't need to worry about the power for the camera

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