An electrical and electronic system having a control unit connected to a remotely located electrical center by way of a data bus. The electrical center includes a bus interface unit and a main printed circuit board having a plurality of control devices such as relays, which selectively activate vehicle electrical circuits based on instructions from the control unit. The bus interface unit is that of a daughter board configured to be plugged into the main board of the electrical center, such as a Local Interconnect Network (LIN) interface board, and the data bus may be a LIN bus.