Unusual Playstation hardware listed as UL certified

http://database.ul.com/cgi-bin/XYV/...n=versionless&parent_id=1073984378&sequence=1

Specifically:

PlayStation 2 debugging stations, Model(s) DTL-H300015
What the heck



PlayStation 2`s, Model(s)

DTL-30100U ???
DTL-H300015 ???
DTL-H30005U ???
DTL-H30105 U (I finally found one after years and years)