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Posted: 10/3/2012 7:05:21 PM EDT
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I picked up a few cameras used and have a question about the power.
From the pics you can tell there is no +/- listed on the power connection only that it is DC12V or AC24V. I found the documentation from the manufacture and it also does not state what terminal should be pos or neg. I like to think I'm not a moron but this has me stumped. Any ideals? 
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The fact that it is good for AC & DC input means it almost has to have an internal bridge rectifier. If so, polarity on the DC input doesn't matter as the rectifier will correct it no matter which way it is.
Disclaimer: I don't know anything about cameras so I could be off base. Just going from my experience with other electronic equipment. |
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Quoted:
The fact that it is good for AC & DC input means it almost has to have an internal bridge rectifier. If so, polarity on the DC input doesn't matter as the rectifier will correct it no matter which way it is. Disclaimer: I don't know anything about cameras so I could be off base. Just going from my experience with other electronic equipment. This is absolutly the correct answer. I have installed a metric crapload of cameras like these, unless it is marked, AC or DC only it has an internal rectifier. However i have installed a few that have polarity markings even though they are dual voltage. |
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