I'm designing, for a railways application, the power supply circuit on a pcb board that supply 5Vdc starting from a 24Vdc(coming from a not clearly defined source, sure a 24Vdc line).
I'm using the TRACOPOWER TEN 40WIR isolated DC/DC converter(railways compliance): (https://www.tracopower.com/products/ten40wir.pdf)
My questions concern the EMI filter circuit. I'm reading the application note from Tracopower (ten40wir-emc-consideration from Traco website) where I find this figure with suggested filter to comply EN50155 Immunity:
Can someone help me, giving me indications on how to design and size an EMI filter that satisfies the en50155?
Maybe there is a commercial solution that is suitable for railways use?