Security lock motor version with external control 509X tubular frame version, The security lock motor version is used primarily where the advantage of a motorized unlocking must be combined with the mechanical security requirements of the lock models 309X and 409X. The integrated monitoring contacts can be used to query important lock states. The bolt is retracted by an electric motor and pre-tensioned by a spring mechanism. When the door is closed, the control latch causes the pre-tensioned bolt to be released and the cross latch to be blocked, which thus serves as an additional locking mechanism., The lock works according to the working current principle and remains locked in the event of a power failure and can only be opened using a key or by operating the inside handle., Mechanical self-locking, With cross latch, therefore can be switched over for doors DIN L / DIN R, Mechanical sequence control of the self-locking between cross latch and control latch, Burglary-resistant thanks to solid bolt with 20 mm throw, Burglary resistance up to class WK2 achievable in suitable door systems, Panic function ¿ approval according to EN 179 ¿ approval according to EN 1125, Suitable for fire doors, Motorised unlocking, therefore perfectly suited for combination with door automation, Use with interchangeable fitting, Changeover function for unlocking with a key from the outside, Monitoring functions, The locks in the 509X model series have a continuous handle follower and therefore require an interchangeable fitting (inside Handle or panic bar, outside button or handle bar). The lock is controlled by an impulse from a card reader, code lock, timer, button, etc., for tubular frame doors