Opening and locking from the inner side - Locking cylinder (Z4) 3061

With freely rotating locking cylinders (FD)

The outer and inside thumb-turn rotate freely when not activated in the freely rotating Locking Cylinder 3061, Doors can also only be opened or locked on the outside using an ID medium on the inside thumb-turn.

With non-freely rotating locking cylinders (CO)

Locking Cylinder 3061s which are permanently engaged for use can be operated from the inside without a ID medium. In this case, the door can be opened and closed using the inside thumb-turn without an authorised ID medium.