A device for failsafe monitoring a number of passes of a moving machine part through a defined movement region comprising an input for receiving an encoder signal, which represents a motion value of the moving machine part. The device further comprises a failsafe evaluation unit for providing a failsafe shutdown signal as a function of the number of passes of the moving machine part through the defined movement region. The failsafe evaluation unit is configured to determine the number of passes of the moving machine part through the defined movement region from the motion value.