will the isolation barrier stay functional in case of thermal overheating?
This is required by DIN EN 61800-5-2 (table D.13 – opto-coupler) and as well in EN ISO 13849-2:2003 (table D.20 - opto-coupler). Basically it says that a failure of the isolation barrier cannot cause an overheating.
And may I ask you to explain below data sheet specification, Chapter 7.8, page 8, please?
Does that mean the external primary side power supply has to power limited to get VDE approval? According to fig. 7.3 that would be about 700mW at 100°C?
Thanks and Best Regards,