scope:

This International Standard applies to interfaces between low-voltage switchgear, controlgear, and controllers (e.g. programmable controllers, personal computers, etc.). This document does not apply to higher level industrial communication networks that have become known as fieldbuses and are considered by IEC subcommittee 65C. The purpose of this document is to harmonize and define rules, components and requirements of a general nature applicable to industrial CDIs. Those features of the various CDI standards which can be considered as general have therefore been brought together in this part of IEC 62026. For each CDI, two main documents are necessary to determine all requirements and tests: a) this document, referred to as "IEC 62026-1" in the relevant CDI parts covering the various types of CDIs; b) the specific CDI part of the IEC 62026 series.