Is the data bath between two extenders electrically isolated from the power supply?
The 895 / 890 /820 the no the data path cannot be isolated for the internal power components. 400VDC will jump through the tightly designed components inside and damage all the chips. On the 860 / 865 units, we do have built in lightning protection, however a load of 400VDC will burn out this protection and render the unit interoperable. All the Extender Kits are designed for 5v 2W AC and if you need to power these via DC power you can purchase aftermarket 5v 2W DC adapters 2.1mm center power head.