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ISO1640: Use of ISO1640 as an IS-to-Non-IS Isolator
ISO1640 has not be certified for Ex applications (IECEx or ATEX).
We have only 2 devices ISO7021 and ISO7041 that are certified according to IECEx and ATEX but currently they can only be used in IS-to-IS applications. Once the new revision of EN 60079-11 is adopted, then there is a possibility that these devices can be used in IS-to-Non-IS applications but that's not expected till the end of 2025.
Are we saying that it may be possible to use ISO1640 as an IS-to-Non-IS barrier as it complies with IEC 60664-1, provided that the draft Edition 7 of the standard is approved?
Or are we saying that it may be possible to use ISO7021 and ISO7041 as IS-to-Non-IS barriers if the draft Edition 7 of the standard is approved?
It's the latter. I am saying that it may be possible to use ISO7021 and ISO7041 as IS-to-Non-IS barriers once the new Edition of the EN standard is approved and we recertify these 2 devices.
There is no plan to certify ISO1640 for Ex applications.
