The DB1200MN Series is a high intelligence 12/24VDC operated "power to lock" mortise mount drop bolt, which fits into 36.5mm depth door frame. If the door does not correctly align with the drop bolt engagement position within the door, the bolt will not activate,avoiding damaged to both the bolt and/or the door. At the same time an audible tone will

alert you that the door is not in position to be locked