The name 100MS gives very little away: this 43.6 KB PDF is catalogued as a schematic, but no device, brand, board number or revision is stated, and the short code most likely refers to a component series. Given its small size, expect only a few pages of ratings, pinout and dimensions. It can still help confirm a part identity during repair if the code on the component matches. Open it in any PDF viewer and check the contents against the physical part before trusting any figure.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.