Douglas Krantz - Technical Writer - Describing How It Works
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I have a question about something

M Wrote:

I appreciated your article on door holder relays. We have fire doors on our nursery and toddler doors that are held open by magnets. The workers have to "pop" the door off the magnet when church starts. Some of the workers are older and have difficulty closing the door. They have asked if we could install a push button under the magnet that would stop the magnet field when pressed, allowing the door to close. Is there a problem with doing this if we use an auxiliary relay as you stated in your article?

Douglas Krantz Wrote:

Adding a switch to interrupt power to the magnet should not be any problem. As a matter of fact, some manufactures install these buttons on the above-the-door door holders. The worst that can happen by installing the power interrupting switch is that if the switch fails, the door closes.






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