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SINAMICS G120C Safety Integrated

SINAMICS G120C is a compact, rugged and easy to operate inverter that can address a wide range of applications.

The G120C inverter offers the Safe Torque Off safety function (STO) to prevent the motor from inadvertently starting.

The safety functions comply with the requirements laid down in EN 61508 for use up to and including SIL 2 (Safety Integrity Level), Category 3 and PL d (Performance Level) according to EN ISO 13849-1.

Product features

  • Function to protect persons and machines

  • Short response times as the functions are integrated in the inverter

  • Can be used in all operating modes

  • Replace external electromechanical devices


The safety function is available in all operating modes and can communicate with the process via safety-related input/output signals.

Communication via fieldbus (PROFINET or PROFIBUS) with the safety-related PROFIsafe profile is already possible in the standard version.

The safety function is commissioned using STARTER or Startdrive.
The partially automated acceptance test for all safety-related functions can be performed with support from STARTER.



STO - Safe Torque Off

The torque is safely shut down and prevents an inadvertent restart.
Electronic shutdown, therefore no wearing parts. The drive remains connected to the line supply and can still be fully diagnosed.

Customer benefits

  • High degree of safety:
    Safety functions are seamlessly implemented in SIL 2 (EN 61508) and PL d, Category 3 (EN ISO 13849-1)

  • High degree of flexibility:
    Practical safety and operator concepts can be realized

  • High degree of cost effectiveness:
    Hardware and installation costs are reduced

  • Higher availability:
    Electromechanical switching elements that are prone to faults are eliminated