A printed circuit board includes a layer. A control device is coupled to a driving device for controlling a machine while being coupled to the module via a data bus for exchanging data. The reactor further includes a second passage defined at least partially by at least a portion of the second wall and a third wall. The inner diameter of the outer filler tube and the outer diameter of the inner filler tube define a space therebetween. The latter is formed and arranged on the card holder in such a way that a tongue which points toward the entrance of the guide shaft and rests in a sprung fashion on the support or on a chip card which has been introduced is implemented, and a gap which corresponds only to the thickness of the chip card is produced between the card holder and the support in the vicinity of the contact field.