Schlage Request To Exit Switch, For Use with ND Series

The N523-194 is the request-to-exit (REX) switch component that goes inside a Schlage ND Series cylindrical lever lock chassis. It signals the access control system that someone turned the inside lever to leave, so the exit is treated as authorized rather than as a forced-door or door-held-open alarm. It is a switch component, not a complete lock, and not a standalone sensor: it lives in the ND chassis and reports lever movement from the secure side.

The N523-194 is sold as a replacement part for the ND chassis, so it is the piece you order when a REX switch has failed or when you are servicing an ND lock that already has the electrified chassis. It is a chassis component rather than a bolt-on external accessory, so the lock has to be taken down and opened to install it. That is a locksmith or integrator job, not a maintenance-cart swap.

Yes, and that is the point of it. An ND lever lock always allows free egress mechanically, so the person inside gets out regardless. The REX switch only tells the access control system that the egress was intentional, so the system suppresses the alarm while outside access stays under the lock's own control. Egress does not depend on the switch working or on the system being powered.

There is one configuration: the request-to-exit switch for the ND Series. No handing, no finish, no voltage choice to pick, because the switch sits inside the chassis where none of that applies. Handing and finish are decided by the ND lock it goes into, not by this part.