Escape Door Strike 331U80 is especially designed to lock doors along escape routes. Model 331U80 is also suitable as an additional locking device for fire doors. Thanks to its reliable unlocking under pre-load (max. 5,000 N), it is primarily used in doors which are subject to escape route requirements.
Left.

Diode (05)
Monitoring contact (RR)
Anchor contact (AK/RR)