basic plc to desktop computer connection

I have a pc running windows ME with rslynx and rslogix 5 on it, and I have an AB plc 5/40 processor I want to be able to program from the computer. Do I need a special interface card for the computer or can I just buy a 9 pin cable that plugs into both?

9-pin (PC side) to 25-pin (PLC side) with a null modem should do you. Set up Linx with the RS-232 DF1 driver.

Keith

officially it's a 1784-CP10 ...

and here's the pinout if you want to build your own ...

PLC-5 User Manual

check out Figure 25.5 on page 25-7 [Adobe Reader page 331 of 350] ...

tip: you probably won't need the little jumpers ... just the three wires 2-2 and 3-3 and 5-7 ...

thanks

thanks for the info, thats what I needed to know. I was looking for that manual pdf too for the dip switch settings!