LIMITING THE CLOSING FORCE ON THE CLOSING EDGE OF A MOVING ELEMENT.

摘要

The invention relates to a limitation of the closing force on the closing edge of a moving element. As well as the motor current, which is measured by means of a measurement resistor, the desired value of the maximum motor current is passed on redundant measurement systems through a measurement circuit arrangement which has been designed in a redundant manner. These measurement signals are forwarded to comparators. If a predetermined motor current is exceeded, a switch- off pulse is forwarded to the control electronics of the drive. The system is fail-safe and intrinsically safe. IMAGE