Everything you need to know about Safety Integrity Level 1 in brakes – from standards to practical application.
What does SIL 1 mean for a brake in concrete terms?
SIL 1 means that a brake must reduce the probability of a dangerous failure by a factor of 10 to 100 . It represents the first level of defined technical safety and requires validated safety performance according to standards such as IEC 61508.
When do I need a SIL 1 certified brake?
A SIL 1 brake is relevant when a brake failure could have serious consequences , for example, in hoisting equipment or applications where uncontrolled backtracking leads to hazards. The necessity arises from a application-specific risk assessment..
What is the difference between hardware and systematic safety integrity in SIL 1 brakes?
Die Hardware safety integrity refers to the failure probability of components (e.g. measured by the B10d value). Systematic safety integrity concerns design, development, and process errors. For a reliable SIL 1 function, both aspects are critical..
Which standard is primarily relevant for SIL 1 brakes?
Die The basic standard IEC 61508 is crucial for functional safety, and thus also for SIL 1 brakes., It defines requirements for the entire safety life cycle from conception to decommissioning.
Is a SIL certificate for a component like a brake sufficient to ensure system safety?
No, a component SIL certificate alone does not guarantee system safety. The SIL level always refers to a defined safety function in the specific application context and the reliability achieved in the overall system. The performance of the SIL 1 brake in the system is decisive..
How does the LOPA method help in selecting a SIL 1 brake?
The Layer of Protection Analysis (LOPA) is a method for systematically determining the necessary SIL level.It analyzes risks and determines the required risk reduction, which can be achieved, for example, through a SIL 1 brake as a protective measure .
Can a single brake achieve SIL 1?
Yes, a single brake can achieve SIL 1, as the example of the Lenze BFK458 shows. This depends on its design, failure rates (e.g. PFHd value), and compliance with normative requirements. For higher SIL levels, redundant systems or additional measures are often necessary.
SIL 1 brakes. offer a defined safety performance, by reducing the risk of a dangerous failure by a factor of a factor of 10 to 100 and are relevant for applications with potentially serious consequences in case of brake failure.
The certification of a SIL 1 brake is based on meeting the requirements for hardware (e.g. B10d value) and systematic safety integrity according to standards such as IEC 61508.; a thorough risk assessment (e.g. using LOPA) is essential.
The use of certified SIL 1 brakes., such as the Lenze BFK458 with a PFHd of e.g. 1.205 x 10-6, simplifies proving system safety and contributes significantly to the minimization of residual risks and to the increased operational safety in.Learn how SIL 1 brakes make your systems safer, which standards apply, and how ATEK Drive Solutions supports you.
Safety is the top priority, especially in industrial drive technology. SIL 1 brakes play a critical role in protecting people and machines. Would you like to learn more about integrating SIL 1 brakes into your systems? Contact us with our experts now!
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Introduction to SIL 1 brakes
The safety of plants is a central concern. This article explains how SIL 1 brakes. contributes to risk minimization and which factors need to be considered when selecting and implementing these safety components of level 1 to ensure reliable safety in drive technology.
What are Safety Integrity Levels (SIL) and SIL 1?
Safety Integrity Levels (SIL) quantify the required risk reduction by safety functions and allow a more precise assessment of the machine’s residual risk. SIL 1 means, for example, that a system must reduce the probability of a dangerous failure by a factor of 10 to 100. SIL 1 thus forms the first level of defined technical safety. Die The choice of the right brake technology is relevant here.
Why are SIL 1 brakes relevant for your systems?
The need for a special safety brake is application-specific. For applications where brake failure could have serious consequences, such as hoisting equipment over 250 kg load, they offer SIL 1 brakes. a validated safety performance. The decision for a brake with SIL 1 is based on a thorough risk assessment of the specific application. A properly designed safety brake is crucial here.Basics of SIL 1 certification for brakes
Hardware vs. Systematic safety integrity: What counts?
For the assessment of a SIL 1 certified brake, both hardware failure safety – the probability of component failure – and systematic integrity are relevant. The B10d value (number of cycles until 10% of parts fail dangerously) is a measure of hardware safety. Both aspects are essential for a reliable safety function.
- The assessment of SIL 1 brakes. takes into account both hardware failure safety and systematic integrity.
- The B10d value is a measure of hardware safety and indicates after how many cycles 10% of parts fail dangerously.
- For a reliable safety function, both aspects – hardware and systematic integrity – are essential.
- The IEC 61508 standard is fundamental for the functional safety of electrical, electronic, and programmable electronic systems.
- IEC 61508 defines requirements for the entire safety life cycle, from conception to decommissioning.
- Knowing this standard is crucial for the correct brake design, especially in the case of a SIL 1 brake.
What standards like IEC 61508 define the requirements?
The IEC 61508 standard is fundamental for the functional safety of electrical, electronic, and programmable electronic systems. It defines the requirements for the entire safety life cycle, from conception to decommissioning. Knowing this standard is essential, especially when it comes to a correct brake design safety brake SIL 1 Sicherheitsbremse SIL 1 .Technical aspects of SIL 1 brakes
How do redundancy and monitoring increase safety?
To increase failure safety, redundancy is often employed, i.e., the use of a second braking system. This is particularly relevant when a single brake does not meet the requirements for a SIL 1 brake . A redundant braking system can, for example, increase the availability of critical functions. Continuous monitoring and diagnostic functions help to identify problems at an early stage, which is important for maintaining the safety integrity level.
By what criteria do you choose the right brake?
The selection of the appropriate braking solution with SIL 1 requires considering environmental conditions and load profiles. The braking moment must be calculated precisely for the application; it is often assumed that 80% of the rated moment is sufficient for the safety function. Factors such as temperature, vibration, and protection class are also critical when selecting such a safety component. Ein compact brake-gear motor must meet these criteria.Challenges and solutions in implementation
Typical pitfalls: Avoid misinterpretations of SIL
A component SIL certificate does not automatically mean absolute system safety. A common misconception is that a component is “SIL 1“, without considering the specific safety function and its failure rate in the context of the application. It is not just the development process that matters, but the performance achieved in the system, especially with components like a SIL 1 brake. The SIL level always refers to a defined safety function and its reliability.
- A component SIL certificate alone does not guarantee absolute system safety; the application context is crucial.
- The SIL level always refers to a specific safety function and its reliability in the system.
- The performance achieved in the system is decisive, not just the development process of the component.
- The Layer of Protection Analysis (LOPA) is a method for systematically determining the necessary SIL level.
- LOPA analyzes risks and determines the required risk reduction through safety measures, such as the use of a SIL 1 brake.
- A consistent quality management system during development minimizes systematic sources of error.
- These methods are also advantageous for modern electronic braking systems that can be designed as SIL 1 braking systems. How LOPA and quality management pave the way
Wie LOPA und Qualitätsmanagement den Weg ebnen
The Layer of Protection Analysis (LOPA) serves to systematically determine the necessary SIL level. This method analyzes risks and determines the required risk reduction through safety measures such as a SIL 1 brake. A consistent quality management system during the development process is critical to minimize systematic sources of error, which is essential for the reliability of a safety brake SIL 1. Even a modern electronic braking system benefits from the application of these methods.Case studies and the Lenze BFK458 brake
SIL 1 brakes. in use: From stage technology to machine engineering
SIL 1 brakes. prove themselves in a variety of application areas. For example, in stage technology, such brake solutions with Safety Integrity Level 1 secure heavy trusses over 500 kg against uncontrolled movements. In machine engineering, they enable stopping dangerous backtracking of spindles in machine tools within milliseconds. These examples illustrate the necessity of reliable braking performance. A effective emergency stop brake is often SIL relevant and can be SIL 1 brake executed.
The Lenze BFK458: Certified safety in detail
The spring-applied brake BFK458 from Lenze represents a proven solution. It is certified by TÜV Nord for functional safety and achieves certification as a single brake. SIL 1 according to IEC 61508. Your PFHd value (Probability of dangerous Failure per Hour) is, for example, 1.205 x 10^-6 under defined conditions. Such certified components, like this SIL 1 certified brake, can simplify the proof of system safety. A sensor-monitored brake can further optimize safety.
SIL 1 brakes. are an important building block for safe industrial plants. The selection and implementation of these safety components require care and understanding of the standards. Expertise is essential to design drive technology safely, especially when using brakes that SIL 1 meet.
