TS EN 61346-2

TS EN 61346-2 addresses how objects are classified within the reference designation system used for industrial systems, installations, equipment, and industrial products, and which letter codes are assigned to those classes. In practical terms, it provides the classification layer that supports consistent identification of items in technical documentation and designation schemes.

How object classes support reference designation

A reference designation is a structured way to identify an item in a complex system by its role, location, or type. Classification groups similar objects under common rules, while letter codes give those groups a concise and repeatable representation in documents. This makes it easier to distinguish electrical, mechanical, control, and other kinds of items in engineering records and diagrams.

Why this matters in engineering documentation

In general technical practice, such coding systems help align parts lists, diagrams, maintenance files, assembly drawings, and system architecture documents. In multidisciplinary industrial projects, class-based designation reduces ambiguity and supports more systematic naming of components. As the part devoted to classification and class codes, TS EN 61346-2 is used together with the broader structuring principles of the series.

This edition focuses on object classes and the associated letter codes indicated by its scope; more broadly, the standard family is concerned with making the identification of items in a system consistent, readable, and technically meaningful.