Do not connect the 1761-CBL-PM02 to the 5/04! The round mini-din connector on the 5/04 is DH+, not DF1 (RS-232); if you connect serially to that port on the 5/04, you may damage CH. 1 of the 5/04. Definitley use the 1747-CP3. The other cable you have is for MicroLogix PLC's.