IEC 62453-1:2016 presents an overview and guidance for the IEC 62453 series. It - explains the structure and content of the IEC 62453 series (see Clause 5); - provides explanations of some aspects of the IEC 62453 series that are common to many of the parts of the series; - describes the relationship to some other standards. This second edition cancels and replaces the first edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: introduction of a new implementation technology (defined in IEC 62453-42).