Arrangement for connecting a component to a master controller in a motor vehicle

摘要

An arrangement for a motor vehicle includes a master controller and a slave controller that use different reference-earth voltages and respectively comprise a transmission and a reception unit for shared data interchange. The transmission and reception units are connected to one another via a shared communication line. The communication line contains a diode that prevents a flow of current from the slave controller to the master controller. The master controller contains a pull-up resistor via which the shared communication line can be connected to a first reference-earth potential of the reference-earth voltage of the master controller.

主权项

1. An arrangement for a motor vehicle, comprising:
a master controller including a first transceiver unit, the master controller being configured to operate with a first reference voltage; a slave controller including a second transceiver unit, the slave controller being configured to operate with a second reference voltage; a communication line connecting the first and the second transceiver units; and a diode arranged in the communication line and configured to prevent a current flow from the second transceiver unit in a direction of the first transceiver unit, wherein the first reference voltage has a first reference potential which is lower than a first reference potential of the second reference voltage, and wherein the first and second reference voltages have a shared second reference potential which is interconnected at a central ground point of the motor vehicle.