The STO Function can be used for disabling the energy to the motor. The motor will thereby be set in a state where it produces no torque.
The STO function have its own input connector mounted at the front of the motor.
It is a two input system and it is required that both inputs are activated (applied with a voltage) before the motor is energized and can operate normally.
The STO is available for all ServoStep products. |
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Partnumber | ||
Partnumber | Motor | STO Connector |
MIS17xQ/R/S/T MIL17xQ/R/S/T User Manual |
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MIS23x/Q/R/S/T User Manual |
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MIS34x, MIL34x User Manual |
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MIS43x User Manual |
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SMC66x (Under development) User Manual |
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SMC85x (Under development) User Manual |
European directives |
Machinery Directive (2006/42/EC) |
EN ISO 13849-1/2 | |
EN IEC 62061 |
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EN IEC 61800-5-2 |
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EMC Directive (2014/30/EU) |
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EN 61000-6-3 |
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EN 61800-3 |
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Low Voltage Directive (2014/35/EU) |
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EN 61800-5-1 |
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Safety standards |
Safety of Machinery |
EN ISO 13849-1/2, IEC 62061, IEC 60204-1 |
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Functional Safety |
IEC 61508-1/2, IEC 61800-5-2 |
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Safety function |
IEC 61800-5-2 |
IEC 60204-1 |
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Safe Torque Off (STO) |
Stop Category 0 |
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Safety performance |
ISO 13849-1 |
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Category | Cat 3 |
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Diagnostic Coverage | DCavg: 98,5 % (Medium) |
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Mean Time to Dangerous Failure (per channel) | MTTFd: 100 years (High) |
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PFHd | 4,29e-8/h |
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Performance Level | PLe |
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IEC 61508/IEC 62061 |
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Safety Integrity Level | SIL 3, SIL CL3 |
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Probability of Dangerous Failure per Hour | PFHd: 1,38e-10/h (High Demand Mode) |
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Diagnostic Coverage | DC: 96 % |
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Safe Failure Fraction | SFF: 96 % |
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Common Cause Failure Factor | CCF 5 % |
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Hardware Fault Tolerance | HFT: 1 (1oo2) |
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Proof Test Interval T1 | 20 Years |
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Mission time TM | 20 Years |
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Reaction time |
Input to output response time | Maximum 8 ms. |
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Response time (internal fault) | Maximum 200 ms. |