The communication, open-loop and closed-loop control functions for the Power Modules are executed in a CU320‑2 Control Unit. Communication with the higher-level control system is performed via PROFIBUS DP or PROFINET.

The CU320‑2 Control Unit and the associated CompactFlash card can be ordered separately or as Control Unit Kit. The Control Unit Kit comprises the CU320‑2 Control Unit, a CompactFlash card and the stored drive software.