Sicherheitsvorrichtung für einen Antrieb

摘要

The invention relates to a safety device for a drive mechanism, comprising a monitoring device (30) which evaluates a value describing the operating state of the drive mechanism (23) to determine whether so as to protect the drive mechanism (23) an emergency operating mode (35) should be started instead of the normal operating mode. The monitoring device (30) generates at least one first output signal (31) for an adjustment element (12, 15, 20) which influences the energy supply for the drive mechanism (23). As output signal (31) the invention uses an alternating signal during the normal operating mode and a continuous signal during the emergency operating mode (35).