Abstract: In order to feed to pluggable electronic modules addresses for an address-controlled data exchange with a control unit, a module code characterizing the type of module is stored in each module in a first memory. A plug location code is further communicated to each module via a transmitter. During an initialization phase, all modules are addressed via the plug location codes and communicate to the control unit their respective module codes. The control unit thereupon communicates the relevant addresses to the modules by addressing the plug location codes, which then are used for further data exchange. The relevant address for each module is stored in a second memory of each module.