IEC 81346-2:2009 pdfダウンロード

IEC 81346-2:2009 pdfダウンロード。Industrial systems , installations and equipment and industrial products – Structuring principles and reference designations – Part 2: Classification of objects and codes for classes
1 Scope
This part of 1 nternational Standard 81 346 , published jointly by 1 EC and 1 SO defines classes and subclasses of objects based on a purpose- or task-related view of the objects , together with their associated letter codes to be used in reference designations.
The classification is applicable for objects in all technical areas , e.g. electrical , mechanical and civil engineering as well as all branches of industry , e.g. energy , chemical industry , building technology , shipbuilding and marine technology , and can be used by all technical disciplines in any design process
2 Normative references
The following referenced documents are indispensable for the application of this documen t.
For dated references , only the edition cited applies. For undated references , the latest edition of the referenced document (including any amendments) applies.
IEC 81 346-1 , Industrial systems , insta l/ ations and equipment and industrial products – Structuring principles and reference designations – Part 1: Basic rules
ISO 1 461 7-6:2002 Graphical symbols for diagrams – Part 6: Measurement and control functions
3 Terms and definitions
For the purposes of this document , the terms and definitions given in IEC 81 346-1 apply .
4 Classification principles
4.1 General
The principle of classification of objects is based on viewing each object as a means for performing an activity often with input and output (see Figure 2). In this respect , the internal structure of an object is not importan t.
Annex A shows the generic process model used for the establishment of the classification scheme based on intended purpose or task as shown in Table 1 .
An alternative classification according to purpose or task in the special case of an object regarded as part of an infrastructure is presented in Table 3.
Each class defined in T able 1 is in this standard associated with a set of predefined subclasses allowing a more detailed characterization of a component , if required. . The definitions of subclasses of objects are presented in Table 2 together with their associated leUer codes of class and subclass .
NO TE 1 Subc l asses do not define a new l eve l in a structure , i .e. they do not d escr i be a subd i vision of the objec t.
Class and subc l ass refe r to the same objec t.
NOTE 2 The use of subclasses for the cod i ng of techn i ca l attributes should be avo i ded , as th is is a separate kind of inf ormat i on presented in the documenta ti on , for exam ple in a techn i ca l spec il i cat i on or in a parts lis t.
4.2 Assigning objects to classes
For the as signment of objects (i.e. component s belonging to the sy stem under consideration) to classes , the following rules apply: