IEC 61753-061-2:2020 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it 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 61753-061-2:2020 contains the minimum test and measurement requirements and severities which a fibre optic isolator as specified by IEC 61202-1 satisfies in order to be categorized as meeting the requirements of isolators used in controlled environments as specified in IEC 61753-1. The requirements cover single-mode pigtailed style polarization independent isolators for category C used in controlled environments. This second edition cancels and replaces the first edition published in 2012 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of the detail high optical power test procedures and the condition in Annex B,
- change of test conditions harmonizing with IEC 61753-1:2018,
- addition of category CHD,
- addition of the detailed measurements conditions in Annex C,
- change of clause structure accordance with the latest ISO/IEC Directives, Part 2.