QSHT 5700 Inverter Safe Torque-off Function
Introduction
264 MagneMotion
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
Introduction
The QSHT 5700 inverters are equipped for hardwired safe torque-off (STO). Hardwired STO
mode, as described in this chapter, applies to the MMI-HT-C2198-D032 inverters.
The hardwired STO function meets the requirements of Performance Level e (PL e) per ISO
13849-1 and SIL CL 3 per IEC 61508, IEC 61800-5-2 and IEC 62061.
Certification
The TÃœV Rheinland group has approved the MMI-HT-C2198-D032 inverter with hardwired
safe torque-off for use in safety-related applications up to ISO 13849-1 Performance Level e
(PL e), SIL CL 3 per IEC 61508, IEC 61800-5-2, and IEC 62061, in which removing the
motion producing power is considered to be the safe state.
For product certifications currently available from Rockwell Automation, go to rok.auto/certi-
fications.
Important Safety Considerations
The system user is responsible for the following:
• Validation of any sensors or actuators that are connected to the system
• Completing a machine-level risk assessment
• Certification of the machine to the desired ISO 13849 Performance Level or IEC
62061 SIL level
• Project management and proof testing in accordance with ISO 13849
Stop Category Definition
Stop Category 0 as defined in IEC 60204 or safe torque-off as defined by IEC 61800-5-2 is
achieved with immediate removal of force producing power to the actuator.
IMPORTANT In the event of a malfunction, the most likely stop category is
Stop Category 0. When designing the machine application,
timing and distance must be considered for a coast-to-stop.
For more information regarding stop categories, see IEC
60204-1.
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