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Old 28th August 2008, 10:43 PM   (permalink)
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Originally Posted by b rett2010 View Post
Re: above comment

The switch would need to be a changeover switch - and you measure th time between the NC contacts opening and th NO ones closing
No, it doesn't have to be at all - two separate switches are all you need, and they are usually both normally open, with separate feeds to the controller.
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