It’s Full Steam Ahead for Delayed Egress Systems

All Hands on Deck



A power interruption to the 715 will not cause the door to unlock or even affect the operation of the delayed egress feature. The inexpensive 9-volt battery used for backup will operate the unit for 200 alarm sequences or seven hours continuously.
Alarm Lock stresses that NFPA 101 regulations are observed and the 715 is connected to an approved supervised automatic fire detection system or sprinkler system. Alarm Lock also recommends using a door closer that is able to fully close the door.


The 715 is a very rugged device suitable for harsh environments. It will withstand a lot of abuse and continue to function properly. For facilities or enterprises which use a large number of delayed egress systems, the 715 offers some great features. It is positive locking, a dead battery or loss of power will not result in a loss of security.


Most failures can be resolved by the replacement of a small inexpensive component available from Alarm Lock, rather than replacing the entire assembly. Installation is surface-mounted; no mortising to the door or frame is required.
The unit offers stylish, cost-effective control of unauthorized use of exit doors and a monitoring output for simultaneous use of CCTV camera, secondary siren, remote monitoring console, etc. A smoke detector input can be used to power existing systems or standalone smoke detector(s). Includes armored door cord and cables for wiring and a 9V battery back-up powers in event of power failure.

Self Monitoring and Integrated Units Help Avoid False Alarms
Securitron’s iMXD and iEXD Series are Integrated Exit Delay Systems. The iMXD and iEXD function as follows: The door’s normal condition is secure from the Model 62 Electromagnetic Lock (in the iMXD/ iEXD housing). A person desiring to exit makes an attempt to exit the door. The iMXD permits the door to move a short distance but it remains secure. The movement of the door is detected by the iMXD, and this movement initiates an irrevocable 15 or 30 second time delay sequence.


In the iEXD, an external sensor is employed, typically a touch sense bar with a dry switch output, and the person desiring to egress presses on the bar which initiates an irrevocable 15 or 30 second time delay sequence.
During the 15 or 30 second delay, a sonalert audible signal sounds in the unit.


The iMXD and iEXD are designed to be connected to a premises fire alarm, and if a fire alarm occurs, egress may be accomplished through the iEXD and iMXD instantly with no delay.


In some code versions, relocking is accomplished by a momentary turn of an integral keyswitch furnished as part of the iMXD/ iEXD housing. Other code versions mandate the use of door position sensing so that reset is accomplished by the act of opening the door. The iMXD incorporates door position sensing and it can be set for relocking via keyswitch or door position sensing.


Note that separate versions of the iMXD are supplied for 12 or 24 volt operation. The iMXD typically is not combined with controlled entry from the outside (via a card reader or digital keypad, for instance). The reason is as follows: for the iMXD to work properly, the door must include a mechanical latch which can’t be operated from the outside.


A person exiting, operates the latch by turning a handle or pushing an exit bar and this starts the delay. If the latch was operable from the outside, delay could be initiated from the outside and false alarms would result. The iEXD however, doe not rely on a latch, so it may be used on applications where card readers but no latch are involved.
The iMXD/ iEXD also include integral lock status sensing. Any time that the unit is in a secure condition, they automatically self-monitor the secure status of the Magnalock (users familiar with the Magnalock as independently supplied will identify this as the Senstat feature).


If the Magnalock fails to internally report “secure” more than five seconds after the door has been initialized or relocked following a delayed exit event, the remote alarm relay will signal an alarm condition. The five second delay is to avoid “false alarms” by allowing a brief period of time for the door to close and the lock to pull in if, for example, the door was relocked (which powers the Magnalock) when it was not entirely yet closed.