Di 5510 and Di 7210 have an LAN,LPT,USB,COM ports and believe that is not a printer its a smart diagnostic tool

The same is with the Di 2510 it does have the board but the print controller Pi 3505e/PS is a option, my problem was that i have the controller but i dont have the ROM/RAM drive(one small **** card) which is placed on the main board where u plug all the options...