The CUA31 Control Unit Adapter is snapped onto the Power Module in blocksize format and communicates with a CU320‑2 Control Unit, a SINUMERIK NCU 7.x or a SIMOTION D Control Unit via a DRIVE‑CLiQ connection.

The CUA31 Control Unit Adapter's power is supplied by the Power Module via the PM‑IF interface. If the CUA31 Control Unit Adapter needs to communicate when the Power Module is switched off, it must be supplied with 24 V DC from an external source.

Other DRIVE-CLiQ devices such as Sensor Modules or Terminal Modules can be connected to the CUA31 Control Unit Adapter.