Yes, I am aware of that possibility but (a) I was specifically referring to the FGS-2x4 series and (b) some countries require a certain distance between the 12V and the 230 V circuits. In Belgium you would not be allowed to use a relay with insufficient creepage and clearance in case the 12 or 24 V used in "wet areas".   The circuit can be connected as you depicted, but it is not (always) considered safe... The idea is that due to pollution and moisture a small leakage current might de