Data communications system e.g. CAN-bus system, especially for motor vehicle, includes two-way switch in data lines for avoiding electrostatic discharges and damage to control devices

摘要

Data communications systems, particularly of vehicles, can suffer from electrostatic charging of the external diagnosis-device plug, thus giving rise to vehicle damage or damage to the control devices connected to the bus-system during its discharge, and to avoid this problem, a two-way switch (7) is inserted into each data line (6), and has its base contact joined to the diagnosis plug (10).