METHOD AND DEVICE FOR RELIABLY CONTROLLING THE CLOSING POSITION OF TWO PARTS THAT CAN MOVE RELATIVE TO ONE ANOTHER

摘要

The invention relates to a device for reliably controlling the closing position of two parts that can move relative to one another, comprising an actuator (16) and a sensor (18). The device can be particularly used as a door contact switch in a protective door for securing an automated technical installation The sensor (18) has a receiver circuit (46, 48) on the input side, said circuit generating a defined receiver circuit signal (52) when a switching distance (44) between the sensor (18) and the actuator is fallen short of. Also provided is a detector circuit (50, 58) that sends a release signal (66) when the defined receiver circuit signal (52) is available. According to one embodiment of the invention, a test element, particularly in the form of a switch element (72), is provided, said element being configured to suppress the receiver circuit signal (52) in a targeted manner.