Datasheet PDF, 256 KB, for the 24C1024, a 1 Mbit I2C serial EEPROM, one of the largest parts in the 24C line. Labelled as a schematic, it most likely describes pinout, 17-bit addressing with the block bit handled through the device address, page write size and electrical ratings. High-capacity EEPROMs like this store firmware data or logs in industrial and consumer equipment. Technicians use it to set the correct device in programmer software and to verify the board wiring. Back up the chip and confirm the image is exactly 128 KB.
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.