An electro-hydraulic control device according to the invention is equipped with a valve (1) and with activating electronics (34) for the electrical activation of the valve as a function of a control signal. A sensor component or actuator component (7) which is held on the valve is connected to the activating electronics by means of an electrical connecting line (32). The perculiarity of the present invention is that a non-volatile data memory (30) is arranged on or in the sensor component or the actuator component (7), and that the data of the data memory (30) can be read out via the electrical connecting line (32).