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What is Safe Torque Off? The LED Controls guide to STO

by Paul Neafcy | Oct 23, 2025 | ABB, Complete Guide, Danfoss, Electric Motors, TECO, variable speed drives

Safe Torque Off is a safety feature built into many Variable Speed Drives (VSDs) and servo drives. It prevents the motor from generating torque – which means it can’t turn – even if it’s still powered. When STO is active, the drive’s...

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What is Safe Torque Off? The LED Controls guide to STO

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