Isolated DC/DC converter application circuit / usage
Most of these commodity DC:DC are "plug and play" with some nominal input and output capacitance.

This particular device is surprisingly similar to the outline championed by Traco

https://assets.tracopower.com/20190124103907/TEN3/documents/ten3-datasheet.pdf

and thus the application notes for a comparable DC:DC is a good place to start: http://www.mouser.com/ds/2/687/ten8wi-application-536504.pdf