Electronic bus system

An electronic bus system for stationary or mobile applications, such as a CAN bus system for use in the process industry or in motor vehicles, said system comprising a bus wire (BW) with at least two signal transmission wires (W1, W2) and a left and a right end, each being defined by a terminating resistor (R1-R3;

• R4, R5) connecting the signal transmission wires (W1, W2) to each other, and a plurality of electronic control units (ECU, ECU1-ECUn), which between the two ends of the bus wire (BW) are connected to the signal transmission wires (W1, W2) and are adapted to transmit and receive electric signals via said signal transmission wires, characterised in that the bus wire (BW) is divided into a plurality of sections (S1-Sn), which are interconnected by means of connecting circuits (CC, CC1-CCn), and forms an annular unit, that each connecting circuit (CC, CC1-CCn) comprises relay means (RE1-RE3;
• RE4-RE7), by means of which each connecting circuit (CC, CC1-CCn) is adapted, coordinated with the other connecting circuits (CC, CC1-CCn), to connect at least one of the electronic control units (ECU, ECU1-ECUn) to said signal transmission wires (C1, W2) and/or to connect at least one terminating resistor (R1-R3;
• R4, R5) to said signal transmission wires (W1, W2) to define the left and/or right end of the bus wire (BW).