410 Rockwell Automation Publication 2198-UM004D-EN-P - December 2022
Chapter 13 Kinetix 5100 Safe Torque Off (STO) Feature
Certification The TÃœV Rheinland group has approved 2198-Exxxx-ERS servo drives with
hardwired safe torque-off for use in safety-related applications up to
ISO 13849-1, Performance Level d (PL d) and Category 3, SIL CL 2 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
website rok.auto/certifications
.
Important Safety Considerations
The system user is responsible for the following:
• Validation of any sensors or actuators connected to the system
• Completing a machine-level risk assessment
• Certification of the machine to the desired ISO 13849-1 performance level
or IEC 62061 SIL level
• Project management and proof testing in accordance with
ISO 13849
Category 3 Requirements According to ISO 13849-1
Safety-related parts are designed with these attributes:
• A single fault in any of these parts does not lead to the loss of the safety
function.
• A single fault is detected whenever reasonably practicable.
• Accumulation of undetected faults can lead to the loss of the safety
function and a failure to remove motion producing power from the
motor.
Stop Category Definition
Stop Category 0 as defined in IEC 60204 or Safe Torque Off (STO) as defined
by IEC 61800-5-2 is achieved with immediate removal of motion producing
power to the actuator.
Performance Level (PL) and Safety Integrity Level (SIL)
For safety-related control systems, Performance Level (PL), according to ISO
13849-1, and SIL levels, according to IEC 61508 and IEC 62061, include a rating
of the systems ability to perform its safety functions. All of the safety-related
components of the control system must be included in both a risk assessment
and the determination of the achieved levels.
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, refer to IEC 60204-1.
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