Special version on request e.g: Electrical status monitoring. Function from the inside: The door has a panic door fitting on the inside. When actuated, the locking latch, which is locked by means of the auxiliary latch, and the pre-locked bolt are retracted. The door can be opened. Function from the outside: The door has a fixed knob on the outside. The locking latch and bolt can be operated with the knob cylinder. After being pulled to, the door is locked by the locking latch. The door can only be opened using the knob cylinder. To open the door, the locking latch is retracted by actuating the knob cylinder with the aid of the key-operated latch. The door can also be locked and unlocked by actuating the knob cylinder.