what is external inhibit

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For Chexit devices shipped after 8-24-2015 with motor driven connect your normally closed contact from access control system between green and red on the twelve field wire ...
Current exit alarm ALK released in November 2010 does ship standard with an EI (external inhibit) option.  ALK shipped prior to this would only have EI if ordered as a Special option.
Chexit devices shipped prior to 8-24-2015 with solenoid driven: A normally closed card reader contact, key pad contact or any other control contact connects to the Green an...
The current Von Duprin ALK comes standard with the External Inhibit feature.
The Falcon Exit Alarm option was updated in June 2012 to include the following benefits. Louder Alarm 95dbs vs 87dbs Easier battery changes 24Vdc hardwire(HW) option included w/ standard board...