Patent ID: 8164919

Claim:
A motherboard comprising: a main body comprising: a signal output terminal; a signal input terminal; a first connector module corresponding to the signal input terminal, the first connector module comprising a first slot connected to the signal input terminal to receive an input signal, a second slot connected to a power source, and a third slot to output the input signal; and a second connector module corresponding to the signal output terminal, the second connector module comprising a first slot connected to the third slot of the first connector module to receive the input signal, a second slot connected to the power source, and a third slot connected to the signal output terminal to output the input signal; and two relay devices attached to the main body, each relay device comprising: a circuit board; a relay mounted on the circuit board, the relay comprising a closed contact, a coil, and an output terminal; and a third connector module attached on the circuit board and coupled with the first and second connector modules, the third connector module comprising a first pins corresponding to the first slots of the first and second connector modules and connected to the closed contact of the relay, a second pins corresponding to the second slots of the first and second connector modules and connected to the coil of the relay, and a third pins corresponding the third slots of the first and second connector modules and connected to the output terminal of the relay.