Manufacturer Part # : P3-550E
Description : Productivity3000 CPU, up to 50 MB ladder memory, 4 x 10 character LCD display, USB A storage, (2) Ethernet 10/100Base-T (RJ45), (1) RS-232 (RJ12), (1) RS-485 (3-pin terminal) and (1) USB A expansion port(s), battery included.