Patent ID: 7876812

Claim:
A method for communicating independent data signals (H, S) between at least two modules connected to a communication link, where the communication link comprises a wired connection having a first lead carrying an electrical signal h line1 and a second lead carrying an electrical signal h line2 , the method comprising: transmitting a first data signal (H) to a connected module in the form of a differential signal over the first lead and the second lead of the communication link, where the electrical signals which are transmitted over the first lead and the second lead of the wired connection for the first data signal (H) are of substantially equal magnitude and have opposite polarity with respect to one another and are referenced about a ground potential that is common to the at least two modules; transmitting a second data signal (S) to a connected module in the form of a non-differential signal in which substantially identical signals are concurrently provided to the first and second leads of the communication link, where the electrical signals which are transmitted over the first lead and the second lead of the wired connection for the second data signal (S) are of substantially equal magnitude and have the same polarity with respect to one another, and are referenced to the ground potential; and recovering the second data signal (S) at a connected module by adding the electrical signals h line1 and h line2 of the first lead and the second lead of the communication link to one another.