METHOD FOR SECURELY TRANSMITTING DATA TELEGRAMS IN ACCORDANCE WITH A SAFETY STANDARD

摘要

A method of securely transmitting, according to a security standard, data messages between a transmitter (10, 20, 22, 24) and a receiver (10, 20, 22, 24), wherein transmitters (10, 20, 22, 24) and receivers (10 , 20, 22, 24) are connected to a common power supply (28) and the data telegram from the transmitter (10, 20, 22, 24) is modulated via a carrier frequency to a voltage between two lines of the power supply (28) and from the receiver (10, 20, 22, 24) is demodulated again, should allow the secure transmission of data telegrams in a technically particularly simple manner. For this purpose, two redundant versions of the data telegram are provided by the transmitter (10, 20, 22, 24), the power supply (28) comprises at least three lines, and the first version of the data telegram is at a voltage between a first line and a second line of the power supply (28) and the second version of the data telegram is modulated to a voltage between a third line and any other line of the power supply (28).