Small 83.6 KB PDF for a part labelled 27c8000i, listed under schematics although the number fits the 27C CMOS EPROM family. The trailing i may indicate an industrial temperature grade, but the name does not confirm it. No board or device information is given. Use the document for pinout, package drawing, timing and programming conditions when dumping or replacing a firmware memory chip. Check that the logo and full marking on the physical part agree with this sheet before programming.
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.