The Electroguard is designed for any 80 Series Exit Device which requires delay on egress. When armed using the cylinder in the rail and the push rail is depressed for more than 1 second, a warning horn sounds and the opening remains locked for an additional fifteen seconds. This time delay allows for an appropriate response to the pending violation. At the end of the fifteen second period, the rail is released and functions as a standard exit device, allowing for free egress.