The communication, open-loop and closed-loop control functions for the chassis units are executed in the CU320-2 PN Control Unit.

The Control Unit Kit, which consists of the CU320-2 PN Control Unit and the drive software installed on the CompactFlash card, provides predefined interfaces that simplify configuring and commissioning. The CompactFlash card is plugged into the CU320-2 PN and can be quickly replaced in order to upgrade the software.