Mortise locks and HS/i electonic locks
HS/i electronic locks can be used with many diferent mortice locks in the market, so even existing doors can be upgraded easily just by adding an HS/i electronic lock and keeping the existing mechanical mortice lock and cylinder.
For new doors without mechanical mortice lock, it is required in order to set the system. The key cylinder is optional and not mandatory, but is a good backup opening method in case the batteries have not been replaced and the lock is out of battery or any malfunction on the electronic lock. Check mortice locks and cylinders in accessories section.
In new doors, depending on the mortice lock used it will provide extra characteristics to the set and also it may be installed in different door types.