Von Duprin 050070 EL Conversion Kit 1/pkg For Use With 99 Series
The EL (Electric Latch Retraction) feature allows for the remote unlatching of exit devices. A control station operator can flip a switch to retract the latch bolt and immediately change an exit door to push-pull cooperation. A continuous duty solenoid retracts the latch bolt, either for momentary unlatching, or for extended periods of time.
The EL feature is an alternative to manual dogging. EL devices are also useful with automatic door operators, and may be applied to fire-rated applications when under the control of an automatic fire alarm system.