Directly from the manufacturer: APEM as a branch of the group Unique powerful PLC with built-in I/Os. Touch, Pro and Lite models for flexible use in almost all applications Drag & drop function block diagram (FBD) makes programming easy Adding scripts to WindLDR makes it easy to manage multiple processes Digital/analog compatible inputs available for 24Vdc, useful for systems that require minimal analog inputs. 40A output relays connect directly to small motors and solenoid valves. Supports RS232C, RS485, and Ethernet communications. Programming via USB port. The user program can be changed with the memory cartridge (Pro / Lite) or USB memory (Touch) Certified for marine applications