The Programmable Logic Controller consists of a small controller programmed in four different languages (ST, FBD, LD, EDP) with eight inputs (24 V dc), four of them can be turned into analog inputs (0-10 V dc), and four relay outputs. The programming is done using the LCD screen and the keypad on the controller or using the programming software (easySoft) and cable included in this model. Electrical connections can be made using either the banana jacks or the terminal blocks.