Siemens 6SL3 040-0MA00-0AA1 SINAMICS S120 Control Unit CU320, without CompactFlash Card, available Interfaces: 4 x DRIVE-CLiQ sockets for communication with other DRIVE-CLiQ devices, e.g., Motor Modules, Active Line Modules, Sensor Modules, Terminal Modules; 1 x PROFIBUS Interface with PROFIdrive V4 profile; 1 x Serial RS232 Interface; 1 x Interface for the BOP20 Basic Operator Panel; 1 x Slot for the CompactFlash Card; 1 x Slot for mounting an option module (e.g. TB30 Terminal Board); 3 x test sockets