Overview
SIST-TP ISO/TR 22100-2:2021, titled Safety of machinery - Relationship with ISO 12100 - Part 2: How ISO 12100 relates to ISO 13849-1, is a technical report published by the International Organization for Standardization (ISO). This document clarifies the interplay between two key machinery safety standards-ISO 12100 and ISO 13849-1-aimed at reducing risks associated with machinery operation. ISO/TR 22100-2 focuses on the usage of safety-related parts of control systems in relation to risk assessment and risk reduction processes, supporting the effective implementation of machinery safety practices.
Key Topics
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Relationship Between Standards
ISO/TR 22100-2 explains how the general principles of ISO 12100 (risk assessment and risk reduction) connect with the specific design and performance requirements of safety-related control systems outlined in ISO 13849-1.
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Risk Assessment and Reduction Process
The report details the iterative process of hazard identification, risk estimation, and risk reduction described in ISO 12100, emphasizing when and how ISO 13849-1 applies-particularly when safety functions are managed by control systems.
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Scope of Application
The standard highlights that ISO 13849-1 applies only to safety-related parts of control systems, not all components. For example, sensors or devices not performing safety functions are outside its scope.
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Input & Output Information
- Input to ISO 13849-1 includes limits of the machinery, risk values from hazard analysis, and specifications for protective measures.
- Output from ISO 13849-1 involves verification results, technical documentation for integration, and user information ensuring correct use of safety systems.
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Standards System Structure
ISO/TR 22100-2 outlines the hierarchical structure of machinery safety standards:
- Type-A (basic standards, e.g., ISO 12100)
- Type-B (generic safety standards, e.g., ISO 13849-1)
- Type-C (machine-specific standards)
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Performance Levels & Risk Correlation
The report clarifies the use of Performance Level (PL) as defined in ISO 13849-1 to quantify safety function reliability and its derivation from the risk assessment in ISO 12100.
Applications
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Machinery Manufacturers
Manufacturers can use ISO/TR 22100-2 as a guidance tool to integrate risk assessment (ISO 12100) with control system safety design (ISO 13849-1) to achieve compliant and effective risk reduction.
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Safety Engineers and Designers
Safety professionals can apply this report to understand how to specify, design, and verify safety-related control systems within the broader risk reduction framework.
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Control System Developers
The standard guides developers on selecting appropriate control system architectures and specifying Performance Levels relevant to identified hazards and risks.
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Regulatory Compliance
ISO/TR 22100-2 assists organizations seeking conformity with internationally recognized machinery safety standards, promoting safer machinery design and operation globally.
Related Standards
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ISO 12100:2010 - Safety of machinery - General principles for design, risk assessment and risk reduction
This foundational standard sets out the overall methodology for identifying hazards and reducing risks to tolerable levels.
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ISO 13849-1 - Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design
Provides detailed requirements and guidance for designing safety-related control systems to achieve required Performance Levels.
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ISO 13849-2 - Safety of machinery - Safety-related parts of control systems - Part 2: Validation
Specifies the validation process to ensure that safety-related control systems meet performance and safety requirements.
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ISO/TR 14121-2 - Safety of machinery - Risk assessment - Part 2: Practical guidance and examples of methods
Offers practical tools for conducting risk assessments within the framework of ISO 12100.
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IEC 62061 - Functional safety of safety-related electrical, electronic and programmable electronic control systems
This standard can sometimes be related to ISO 13849-1 for the design of functional safety in machinery control systems.
This technical report is essential for industrial safety professionals and machinery manufacturers aiming to align risk management with control system safety, enabling effective integration of safety standards to reduce machinery-related hazards.
Keywords: ISO/TR 22100-2, ISO 12100, ISO 13849-1, machinery safety, risk assessment, safety-related control systems, risk reduction, Performance Level, safety standards integration.
