A device for open-loop control or closed-loop control of a technical installation has a first backplane module, a second backplane module and a third backplane module which are configured to be positioned side by side on a mounting rail in a longitudinal direction. The first backplane module has a first main body and a first contact part. The second backplane module has a second main body and a second contact part. The third backplane module has a third main body and a third contact part. The main bodies each have an upper side comprising insertion openings which are configured to receive electrical contacts of separate electronic modules. The contact parts form a bus line in the longitudinal direction such that plugged-in electronic modules can be electrically coupled to one another by means of the contact parts. The second main body further has a receptacle, in which the second contact part is arranged in one of at least two defined variants. In a first variant, the second contact part has an electrically conductive connection to the first contact part and to the third contact part. In a second variant, the second contact part has an electrically conductive connection to the third contact part, but not to the first contact part.