It can provide an unlimited number of counters and timers. Features include a backlit LCD, shift registers, and cursor keys that can be configured as inputs. A memory cartridge can be added and there are seven different base modules with voltage ranges from 12 Vdc, 24 Vac/dc to 100-to-24 Vac/dc. Each CPU module has 12 built-in I/O points, a realtime clock, and calendar. There are five available expansion I/O modules and two communication modules. Maximum I/O configuration is 24 digital inputs, 16 digital outputs, and 8 analog inputs. Special Windows-compatible software lets users program the device in ladder logic if desired, and programs can be saved in JPG or PDF formats.