Rockwell Automation 6180 RAC6180 Industrial Computers Installation Instructions - Manual (Page 12)

12 RAC6180 Industrial Computers
Publication 6180-IN001B-EN-P
Mounting Cutout
The following figure provides the dimensions for making the panel or
enclosure cutout. If you are using mounting clips, the mounting studs are
removed and the 18 stud holes are not necessary.