Abstract: The invention relates to a device (1), particularly a plug-in card, for a data processing device (2), e.g. for a computer, a printer or the like, the data processing device (2) being networked with at least one other data processing device (4, 6). The data processing device (2) comprises a main board (22) with interfaces (26, 28, 30, 32, 34, 36, 40, 42) for other components of the data processing device (2) and/or for the interaction of the data processing device (2) with a user including an interface (42a, 42b) to an electrical switching element (44, 46), via whose actuation the data processing device (2) can be switched on, switched off or reset. The device (1) is connected to a controller (14) via a network (16).