ISO1640: Use of ISO1640 as an IS-to-Non-IS Isolator

Hi Muhammad,

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.

Thanks,
Saleem Marwat

Hi Saleem,

Thanks for your quick response.

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?

Hi Saleem,

Thanks for the clarification. Do TI offer any app note or other devices that can help with designing an IS-to-Non-IS barriers for I2C bus?

Thanks Saleem.