IEC PAS 62400:2005 pdf download Structuring principles for technical products and technical product documentation – Letter codes – Main classes and subclasses of objects according to their purpose and task
Scope
This PAS extends the letter codes of the main classes for purposes or tasks of obiects inaccordance with IEC 61346-2, Table 1, with a second-letter code for subclasses. Thesespecifications are generally applicable. They apply equally for all disciplines, such asconstruction, process and electrical engineering, and for standards, for example, for powergeneration, power distribution, process engineering facilities, naval architecture and oceanengineering. Additional letter codes may be specified for further subdivision of the classes.
Specification of letter codes for the main and subclasses for infrastructure objects inaccordance with IEC 61346-2, Table 2, are not part of this document.
2 Normative references
The following referenced documents are indispensable for the application of this documentFor dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
EC 61346-2, Industrial systems, installations and equipment and industrial products -Structuring principles and reference designations – Part 2: Classification of objects and codes
for classes
SO 3511-1,Process measurement, control functions and instrumentation – Symbolicrepresentation -Part 1: Basic requirements
SO 14617-6:2002,Graphical symbols for diagrams – Part 6: Measurement and controlfunctions
Specification of letter codes
Letter codes are specified and are generally applicable for objects fulfilling the followingpurposes or tasks.
– Control functions, functional allocation = = Functional allocation
– Functional equipment unit, equipment unit = Function, system
– Product, components – Product, component
4 Letter codes for objects based on their purpose or task
4.1 Overview of main classes of objects with associated letter codes
Table 1 – Letter codes for objects in accordance with IEC 61 346-2 (main classes)
4.2 Rules for generating subclasses
The following rules have been observed for determining the letter codes for the subclasses (2nd data character).
– The main classes as defined in Table 1 are subdivided into subclasses as shown in Table 2, with the exception of the main class with the letter code B.
– The letter codes for subclasses of the main class with the letter code B are specified according to ISO 351 1 -1 .
IEC PAS 62400:2005 pdf download
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