This breakglass emergency door release is designed to provide a physical method of unlocking a door secured with an electronic lock in the event of an emergency. They are usually connected in series with fail safe electronic locks, which immediately cut the power to the lock when the switch is activated, thus unlocking the door. The EM200 is a double-pole breakglass switch. When a user presses on the plexi-glass plate and breaks it, a micro switch is operated.
