latch bolt monitoring purpose

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THIS ITEM IS DISCONTINUED - See the related solution "Is a latch bolt monitor available with the Schlage mortise electrified locks?"Latch monitoring, or LM is available as an option on the&nbs...
The ND-Series RX,  the L-Series RX and latch monitoring switches are Form C - Single Pole Double Throw (also known as SPDT).
LX Feature
LM, LX
As of February 2016, some Schlage electrified locksets can be ordered with deadbolt monitoring.  To order deadbolt monitoring with an L series lockset specify DM in the option field....
The DS is Dual Monitor Switch for Von Duprin 6000 series electric strikes. DS option cannot be added to a Von Duprin 6000 series electric strikes in the field. It is only available factory inst...
The 900-2Q board is no longer available. For warranty purposes, QEL conversion kit and 900-2RS board are required. The 900-2RS replaces the 900-2Q board.