Siemens 6SL3246-0BA22-1PA0 SINAMICS G120 CU250S-2 DP 15DI/3DO/2AI/2AO VFD Control Unit

The Siemens 6SL3246-0BA22-1PA0 is a SINAMICS G120 CU250S-2 DP control unit with integrated PROFIBUS DP, offering up to 15 digital inputs, 3 digital outputs, 2 analog inputs, and 2 analog outputs, including 3 fail-safe DI and 1 fail-safe DO for Safety Integrated STO/SBC/SS1. It supports sensorless and encoder-based vector control plus V/f modes, running from a 24 V DC supply at up to 2 A.

Selection Notes

The DP suffix means PROFIBUS is built into this Control Unit, so it pairs directly with a PROFIBUS-based SINAMICS G120 line-up without adding a separate fieldbus module — a PN-variant Control Unit is the choice for PROFINET networks instead. The onboard STO, SBC, and SS1 functions plus 3 fail-safe DI and 1 fail-safe DO cover basic safe-torque-off applications without an external safety relay; more advanced Safety Integrated functions require the extended safety license. Vector control with sensor and encoderless torque control are both available on this unit, so the drive can run closed-loop with a DRIVE-CLiQ encoder or open-loop without one, depending on the motor and application.

Applications

SINAMICS G120 drives on PROFIBUS-based machines that need integrated safe-torque-off functions plus a mix of digital and analog I/O — conveyor, pump, or fan applications where the Control Unit's onboard STO/SBC/SS1 removes the need for an external safety relay.