Delayed Egress: What, Where, Why And How?

Common applications include retailers wishing to reduce shoplifting and school and healthcare facilities needing to prevent children or patients from wandering out the door.

For remote alarm applications, a relay contact is provided to give external alarm indication. This contact closes when the device is in an irreversible alarm condition. This contact can be used to drive a horn, lamp, or other indicative device.

The Key Switch provides the means to arm, disarm or reset the Chexit. The key can be removed in either the Arm or Disarm position.

Status can be determined by the indicator lamp. When the lamp is off, this indicates the device is disarmed and is functioning as a normal exit device (no delay). A continuously on lamp indicates the device has just been armed and as soon as the selectable rearm timer expires, the device will arm. A slow flashing lamp indicates the device is armed. A fast flashing indicator lamp indicates the device is in alarm.

Whenever the device is in alarm or the pushpad is pressed, the internal horn will sound. The volume level of this horn exceeds 85 db at 6 feet.

An external door position switch can be connected to the Chexit. Using the door position input ensures that the door is in the closed and latched position before the device rearms.

An optional External Inhibit Input is provided to allow authorized egress of the Chexit in the armed condition. It also allows remote reset of the Chexit in an alarmed condition.

The Fire Alarm Input disables the Chexit immediately upon a fire alarm.

An Internal Auxiliary Lock is engaged when the Chexit is armed. The locking mechanism is specifically designed to hold securely even when the exit device is struck with forceful blows.

The User Definable Rearm Time is the amount of time after the device is activated before it arms. Timing can be changed by the user for any time between 2 and 28 seconds in two-second increments. An infinite rearm setting requires the use of an external door position switch. The door remains in the rearm mode until the door is closed, useful on jetway doors in an airport.

Most jurisdictions allow 15 seconds of delay before allowing egress. In those cases where 15 seconds is not appropriate, Von Duprin can set the Chexit for any delay time between 0 and 60 seconds on 2 second increments.

With a card reader,the Chexit can be used as an access control device. The card reader allows access. Using a door position switch gives added security to the opening in case the door is not reclosed.

With the Chexit disarmed, the opening functions as a normal exit device. If card readers are required on both sides of the door, the normally closed contacts of the readers should be weird in series.

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