I saw several power supplies which use a male output connector. For example the Meanwell OWA 90E series uses a
XLR 4P or
NEUTRIK NC4MX with 2 pins for
+ and 2 pins for
Source: Jmb at English Wikipedia (CC-by)
I do not understand why anyone wants to use a plug where pins could be touched and short circuit accidentally. The device itself would not take any damage (short protection: hiccup mode.)
I would expect female contacts which can not be touched or shorted easily.
What feature is worth the risk of accidental contacts on the output?