Four kinds of basic functions of the lock are provided, such as no lock, lock outside lock inside and interlock and all the functions can be realized together with the extended use of extra sensors or pass IC cards.
Connects according to the above schematic drawing and the four modes of the lock can be realized with the key when necessary. Location means that lock free. Location means that the door inside is locked and only can be opened from outside. Location means that the door outside is locked and only can be opened from inside. And Location means that the door is locked completely both from inside and outside.