List all objects (components, functions, locations). Example: a conveyor system.
IEC 61346-1 emphasizes explicit relationships:
Documenting relationships improves impact analysis (what breaks if a component is changed), spare-parts mapping, and failure-mode tracing.
Start at the IEC Webstore → Search "61346-1" → It will show "Replaced by IEC 81346-1" → Click that link → Add to cart.
If you only need the principles (not the official text), many engineering handbooks and control system design guides summarize IEC 81346-1 clearly – but for compliance, buy the standard.
Would you like a worked example for a specific system (e.g., a pump station or a PLC panel)?
The story of the IEC 61346-1 standard is one of a transition from an electrotechnical rulebook to a universal language for all engineering disciplines. 1. The Chaos Before the Order
Before the mid-90s, industrial projects often felt like a "Tower of Babel". A single machine could have different names depending on who you asked: a "pump" to the mechanical engineer, a "load" to the electrical engineer, and "Unit 4" to the site manager. This fragmentation made it incredibly difficult for different teams to share data without errors. 2. 1996: The Birth of IEC 61346-1
On March 13, 1996, the International Electrotechnical Commission (IEC) released IEC 61346-1:1996. It wasn't just a naming guide; it was a "horizontal standard" designed to create a common structure for information. It introduced three key "aspects" to view any system: Function (=): What the object is doing. Product (-): What physical item is being used. Location (+): Where the object is physically located. 3. The Growing Pains
While revolutionary, the standard was still seen as "too electrotechnical". Other industries, like civil and mechanical engineering, felt it didn't quite fit their needs. Additionally, some users found the rules for "reference designation groups" and "transitions" between structures to be confusing and ambiguous. 4. 2009: The "Joint" Transformation
Recognizing the need for a truly universal system, the IEC teamed up with the ISO (International Organization for Standardization). On January 31, 2010, IEC 61346 was officially withdrawn and replaced by the ISO/IEC 81346 series.
IEC 81346-1:2009 - Industrial systems, installations and ... - ISO
Understanding IEC 61346-1: The Foundation of Industrial Structuring iec 61346-1 pdf
If you work in industrial automation or electrical engineering, you've likely encountered complex systems that feel like a labyrinth of components. IEC 61346-1 was designed to be the map for that labyrinth. Though it has since been withdrawn and replaced by the IEC 81346 series, its principles remain the DNA of modern technical documentation. What is IEC 61346-1?
IEC 61346-1, titled "Industrial systems, installations and equipment and industrial products — Structuring principles and reference designations," established the international standard for how we name and organize technical objects.
The core idea was simple but revolutionary: instead of naming a part based on what it is (like "a bolt"), you name it based on what it does or where it lives within a system. Key Concepts: The Three Aspects
The standard introduced a "multi-aspect" approach to identifying equipment. To fully understand a component, you look at it through three different lenses:
Function-oriented (-): What is the object doing? (e.g., "The cooling system")
Location-oriented (+): Where is it physically located? (e.g., "Control Cabinet A")
Product-oriented (=): What specific physical hardware is it? (e.g., "Siemens S7-1200") By using these specific prefixes ( minusm i n u s plusp l u s equalse q u a l s
), engineers can create a Reference Designation (RD) that tells you exactly where a part is and what its job is, regardless of which manufacturer made it. Why was it replaced?
In 2009, IEC 61346 was succeeded by IEC 81346. The "8" was added to signify a joint standard between the IEC and ISO, creating a unified language across all engineering disciplines—from civil and mechanical to electrical and software.
If you are looking for a PDF of IEC 61346-1, you will typically find it in the "withdrawn" archives of standards bodies like the ISO Store or the IEC Webstore. However, for any new projects, it is highly recommended to use the current IEC 81346-1:2022 version to stay compliant with modern safety and documentation requirements. Why Should You Care?
Consistency: Every engineer on a global team speaks the same "tagging" language.
Maintenance: A technician can find a faulty sensor in seconds using its Location-oriented designation. List all objects (components, functions, locations)
Scalability: As systems grow, the hierarchical structure of the standard keeps the documentation from becoming a mess.
Title: Understanding IEC 61346-1: Functional Safety in Process Industry
Introduction
The International Electrotechnical Commission (IEC) published the IEC 61346-1 standard to provide a framework for ensuring functional safety in the process industry. The standard focuses on safety instrumented systems (SIS), which play a crucial role in preventing and mitigating hazardous events. This essay provides an overview of IEC 61346-1, its significance, and key aspects of the standard.
Background
The process industry, including sectors such as chemical, oil and gas, and pharmaceuticals, involves complex processes that can lead to hazardous situations. The need for a standardized approach to functional safety led to the development of IEC 61346-1. This standard provides a systematic methodology for designing, implementing, and maintaining SIS to ensure functional safety.
Scope and Key Concepts
IEC 61346-1 applies to SIS that are used to achieve or maintain a safe state of a process. The standard defines key concepts, including:
Requirements and Guidelines
IEC 61346-1 provides detailed requirements and guidelines for SIS design, implementation, and maintenance. Key aspects include:
Benefits and Impact
The implementation of IEC 61346-1 offers several benefits to the process industry, including: maintenance by product axis (equipment)
Conclusion
IEC 61346-1 provides a comprehensive framework for ensuring functional safety in the process industry. By understanding and implementing the standard's requirements and guidelines, organizations can reduce the risk of hazardous events, improve safety, and increase efficiency. As the process industry continues to evolve, the importance of IEC 61346-1 will remain crucial in ensuring the safety of people, the environment, and assets.
You can download the IEC 61346-1 pdf from the official IEC website or other authorized sources.
Here is where the deep magic happens, often misunderstood by casual readers of the PDF.
IEC 61346-1 explicitly forbids "flat lists." It demands a hierarchical structure.
Consider a Variable Frequency Drive (VFD).
The standard forces you to admit that -Q01 (the VFD) and --K01 (the contactor) are different objects with a parent-child relationship.
The Engineer’s Dilemma: When a fault occurs, the PLC sees an error on --K01. The maintenance manual is indexed by -Q01. The ERP system ordered -Q01 as a spare part. But --K01 is inside -Q01.
If your naming system doesn't encode hierarchy, you cannot automatically map the fault (deepest level) to the spare part (higher level). You rely on tribal knowledge. IEC 61346-1 was designed to eliminate that tribal knowledge.
A major feature emphasized in the document is the separation of the functional view from the physical view.
(Note: numeric ranges reflect typical industry reports and pilot project results; outcomes vary by organization.)
IEC 61346-1 promotes structuring along multiple axes so stakeholders can choose the view best fit for their needs:
Practical projects often combine axes: a control engineer may view the plant by functional axis (control loops), maintenance by product axis (equipment), and operations by location axis (areas/units).