10-06-2006, 07:48 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,886
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only thing that comes to mind is the operating relays are "fail safe - open" -- that is the relays are normally operating when power is applied , but when power is interrupted they assume a closed position in the motor circuit to open the door. Normally closed relays that normally operate open when power is on are closed - opening the door when power is restored.
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