ELECTRICAL PLUG CONNECTOR

An electrical plug connector () including a housing (); at least one input-side contact (, , ); at least one output-side contact (, , ); and an electrical circuit () arranged inside the housing (). The electrical circuit () has a sensor device (), a control device () and a communication interface (). The sensor device () is designed to detect an electrical operating parameter; and the control device () is designed to generate output data on the basis of the electrical operating parameter and to output said data by a communication interface (). A method for operating a system having an electrical plug connector () is provided in which the plug connector () includes a sensor device () for detecting an electrical operating parameter.