what is "First-Person-in" Unlocks Door

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The First Person In feature is used in combination with AutoUnlocks. If the First Person In feature is enabled, the lock will remain locked until a user presents a credential to open the door. The ...
Yes, the 4600 Series operators have a built in ES (electric strike) relay that can be used to unlock a strike, maglock, or EL device before opening the door.
Surface Mounting - A 9542 DD (double door) header and a 9540-18 mounting plate can be used on the active leaf. A manual closer with a PA (parallel arm) can the be installed on the inactive leaf.  B...
When CX99L-BE is not armed with key cylinder on the device or shunted by card reader, the exterior 996LBE lever trim will release.
Check the timing first, Where can I find timing instructions for the Falcon T lock? The keyspindle assembly for the T/RU571 and the T/RU561 w...
Replace the lock chassis as necessary for any T locks exhibiting this issue.  RU locks need to be replaced entirely. 
There is potential for ND40/ND44's manufactured around March 2011 to remain locked after egress, or after the latch is depressed.  There was an issue with the keycam that created a bind when l...