Abstract: A vehicle computer arrangement, particularly for a motor vehicle, a train, an airplane or a ship, which is provided with at least two computers (10, 20) and at least one data bus (60) via which the at least two computers (10, 20) are interconnected, and in which at least one monitoring circuit (40) is arranged between a first computer (10) and a second computer (20) of the at least two computers, the monitoring circuit checking whether a data exchange between the first and the second computer is permitted for data processed or to be processed in the first or the second computer, and blocking the data exchange in the event that it is not permitted for the monitored data.

Abstract: The data communication device is designed for a towed vehicle having wheels rear lights, brake lights, turn signal lights and an anti-lock braking system, that is drawn by a motor vehicle. This data communication device includes an electrical cable connection (19) for supplying electrical power from the towing vehicle to the rear, brake and turn signal lights; an electrical pulse generator and electrical power supply circuit (14) for producing direct current from wheel motion of the towed vehicle; a rechargeable battery (15) to provide a supplementary direct current in addition to this direct current, when necessary; a controller (10) for the anti-lock braking system including a data producing unit (7) for producing data including mileage covered by the towed vehicle and a wireless transponder (6) operating the gigahertz range for transmission and reception of data from the data producing unit to and from an external data transmitting and receiving station (1).