I have a machine down and can not get on line with this thing. The cpu is a allen bradly slc 5/03 it has a DH 485 port (the one that looks like a phone jack with 8 pins) and it has a RS 232 port nine pin. The numbers on the bottom of the door for the cpu are 1747-L532. Do I use 5 or 500 to get onto this machine? Then which port and what driver do I configure? thanks for the help folks.