CONTROL UNIT

The invention relates to a braking system (1) for a commercial vehicle (100) with trailer, comprising a trailer control valve (24), a supply pressure line (46), a control pressure line (44), valve means for selectively connecting either the supply pressure line (46) or the control pressure line (44) to the trailer control valve (24), and an electronic control unit (10) configured to execute electronic brake regulation. According to the invention, it is proposed that the valve means be designed as a structural valve unit (40), which is switchable by means of the electronic control unit (10) between the switching states of connecting a trailer-side pressure line (52) to the control pressure line (44), and connecting the trailer-side pressure line (52) to the supply pressure line (46), and which is configured to apply a regulation pressure to the trailer-side pressure line (52) in a brake regulation case depending on corresponding commands from the electronic control unit (10).