Siemens CU240B-2 Control Unit for SINAMICS G120 Drives 6SL3244-0BB12-1BA0

The Siemens 6SL3244-0BB12-1BA0 (CU240B-2) is a standard control unit designed for use with Siemens SINAMICS G120 modular frequency inverter systems. Built to snap directly onto compatible SINAMICS G120 Power Modules, this control board handles closed-loop motor control, digital and analog signal processing, and integrated communication within automated drive systems. Equipped with an RS485 interface, the unit supports standard industrial fieldbus communication protocols including USS and Modbus RTU for reliable connection to programmable logic controllers. The hardware includes four digital inputs, one digital relay output, and one analog input to accommodate standard sensor and control signals. The unit operates from an internal supply from the power module or an external 24 V DC power feed. It provides vector control and linear or quadratic V/f characteristic curves, making it well-suited for general machinery, material handling conveyors, industrial ventilation fans, and centrifugal pumps. The compact housing simplifies installation and cabinet maintenance, providing dependable system operation across various industrial automation environments.