Siemens SINAMICS G120C User Manual

8.16 Safe Torque O󹪜 (STO) safety function
8.16.1 Where are the safety functions described?
Overview
The operating instructions describe how to commission the STO safety function as basic
function for control via a failsafe digital input.
A description of all the safety functions is provided in the "Safety Integrated" Function
Manual:
• The basic functions and the extended functions
• Controlling safety functions via PROFIsafe
Overview of the manuals (Page465)
8.16.2 Principle of operation
Overview
6HOHFW672
672LVDFWLYH
An active STO function prevents energy from being fed to the motor. The motor can no
longer generate torque on the motor shaft.
Consequently, the STO function prevents the starting of an electrically-driven machine
component.
Requirement
The machine manufacturer has already performed a risk assessment, e.g. in compliance with
ENISO1050, "Safety of machinery - Principles of risk assessment". The risk assessment must
con󹪝rm that it is permissible to use the STO safety function.
Advanced commissioning
8.16Safe Torque O󹪜 (STO) safety function
SINAMICS G120C Converters
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK 255

Siemens SINAMICS G120C Specifications

General

Brand	Siemens
Model	SINAMICS G120C
Category	Inverter
Language	English