An automation unit for training purposes, with a computer, including an arithmetic and logic unit, a computer housing, a data interface and a screen, wherein the arithmetic and logic unit, the data interface and the screen are accommodated in the computer housing. At least one operating module is provided, which includes a module casing on which is formed a connection device for electrical and/or fluidic connection to an external component and in which a processing unit for the processing of electrical signals of the computer and/or the external components is accommodated, wherein the operating module is designed for location in a working position adjacent to the screen and for signal communication with the arithmetic and logic unit via a wireless and/or wired signal path which runs over the data interface.