The 1091A is locked when energized. Recommended for safety applications, it is intended that the door unlock automatically when power is interrupted by the access
control, power failure or signal from a fire life safety system.

• Bolt Throw 0.75" (19.05mm) 1091ADL Deadlocking Failsafe
The 1091ADL is equipped with a deadlocking mechanism that prevents the bolt from being tampered with and pried to
unlock. The 1091ADL has all the operational features of the 1091A (above) and is recommended for failsafe applications
requiring a higher level of security.