Siemens 6SL3246-0BA22-1BA0 SINAMICS G120 CU250S-2 6DI/3DO IP20 VFD Control Unit

The Siemens SINAMICS G120 CU250S-2 control unit 6SL3246-0BA22-1BA0 adds sensorless and encoder-based vector control to a G120 power module, with Safe Torque Off, Safe Brake Control and Safe Stop 1 built in. It provides 6 configurable digital inputs, 3 digital outputs, 2 analog inputs, 2 analog outputs, and an integrated RS485 interface for USS/Modbus RTU, all in an IP20 / UL open type enclosure.

Technical Specifications

Selection Notes

Pick the CU250S-2 over the base CU240 line when the application needs closed-loop vector control with an encoder (D-CLiQ, HTL/TTL, SSI, or resolver via terminal) or the Basic Positioner (EPOS) function, which requires the license extension noted in the Siemens description. The 3 fail-safe digital inputs and Safe Torque Off / Safe Brake Control / Safe Stop 1 cover most machinery safety category needs without an external safety relay; the Extended Safety license adds further safe functions if the machine also needs SLS or SS2. This is a control unit only and must be matched to a G120 power module of the appropriate power rating to form a complete drive.

Applications

Suited to G120 modular drive builds that need encoder feedback, positioning, or integrated safety at the drive level: conveyor sections, hoists, and machine axes where Safe Torque Off replaces a separate contactor-based safety circuit.