The Safe Torque Off (STO) is an electronic signal used in industrial
motor controller
A motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. A motor controller might include a manual or automatic means for starting and stopping the motor, selecting forw ...
s for safety reasons.
Description
The STO function is the most common and basic drive-integrated safety function. It ensures that no torque-generating energy can continue to act upon a motor and prevents unintentional starting.
External links
ABB Webpage TutorialSiemens Webpage Tutorial
References
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Electrical safety
Electric motors