Hello,
We are in the process to design a RS485 IS (Intrinsically Safe) Isolation Barrier/Repeater for use in a coal mine application. The certification agency has asked us, if possible, to provide them with the distance through insulation (DTI) of the isolation barrier of the ISO15DW. We did not find any information describing the physical distance between the primary and secondary parts of the device in the data sheet and related documents such as the SLLA353A–October 2014–Revised September 2017 (Isolation Glossary) and in the blog 'Comparison of Isolation Technologies'. As the device's isolation is achieved by galvanic principles and not optically, we realize that it might not be a valid question that we are asking. The standard over current (fuse) and over voltage (zener) protection will be utilized to prevent the isolation barrier of over heating in case of circuit failures by adhering to the Safety-Limiting Values as described in the data sheet.
Thank you in advance for your assistance.
