IEC TR 62541-1:20 20 RLV包含官方IEC国际标准及其红线版本。Redline版本仅提供英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 62541-1:20 20介绍了OPC统一架构（OPC UA）的概念和概述。阅读本文档有助于理解这个多部分文档集的其余部分。简要解释了IEC 62451的每个其他部分以及建议的阅读顺序。

IEC TR 62541-1:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

IEC 62541-1:2020 presents the concepts and overview of the OPC Unified Architecture (OPC UA). Reading this document is helpful to understand the remaining parts of this multi-part document set. Each of the other parts of IEC 62451 is briefly explained along with a suggested reading order.