Recomended input filter for IS1215A DCDC module?

[treez]

Hi,
The ISE1215A DCDC module , on the last page of its datasheet, has a recommended input filter which comprises an inductor at its input, with no capacitor downstream of it…..
Surely this is inadviseable?
SMPS’s should have see a low impedance looking back from their input terminals back towards their input filter. Would you agree?

ISE1215A DCDC mopdule datasheet
https://www.farnell.com/datasheets/...MI1c35ko6-6QIVU-3tCh3Bxw6VEAAYASAAEgK7FvD_BwE

 

[betwixt]

There is one inside the module already!

It isn't an IC, it is a small circuit board with a tiny ferrite transformer on it and it has capacitors at the input.

Brian.