Arrangement for preventing impermissible rotation direction of electric drive e.g. for printing machines, has switches from 4-quadrant operating mode to 1-quadrant mode when protection device actuated

摘要

The arrangement has a monitoring unit for a protection device (7,8) that interacts with a drive module (5) via a suitable mechanism so that when the protection device is actuated the drive is switched from a 4-quadrant operating mode into a 1-quadrant mode. The protection device prevents access to a series of rollers (2,3) in a first operating state and allows it in a second state in which the drive (1) is switched to 1-quadrant mode.