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Re: what is a relay?
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Posted by buickanddeere on November 14, 2004 at 08:20:15 from (64.10.41.55):
In Reply to: what is a relay? posted by StuBC on November 14, 2004 at 06:35:58:
In addition to the previous posts.The relay provides isolation of the control circuit from the power circuit. And allows different frquency,voltage or polarity to control other electrical sources. If more than one set of contacts are used on a relay. That allows one signal source to control more several loads but the loads are isolated form each other. A 5 volt output from you machine's computer can turn 12V on or off. This protects the sensors and logic circuits from surges and spikes heavy loads being switched. I saves having to filter all electrical loads to "computer clean" quality.
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