If you want the now common 9 pin RS232 on the PC side.
The 3 wire cable is
25pin ***********9 pin
4-5 jumpered and 7-8 on the 9 pin end
6-8-20 jumpered and 1-4-6 on 9 pin end
2-----------------2
3-----------------3
7-----------------5
No connection between 9pin & 25 pin jumpered out pins.
Some PC communication programs will turn off the Hardware Handshake in which case the jumpers on the 9 end could be eliminated.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.