Patent ID: 7701684

Claim:
A power supply system comprising: a plurality of power supply apparatuses; and a bus line connecting said plurality of power supply apparatuses to each other, said power supply apparatuses each including: a voltage generation circuit generating a voltage; an abnormality detection circuit detecting an abnormality of the power supply apparatus including said abnormality detection circuit and outputting an abnormality detection signal; an abnormality control circuit; and an interface circuit receiving the abnormality detection signal from said abnormality detection circuit and outputting the abnormality detection signal to another power supply apparatus via said bus line, and receiving an abnormality detection signal from said another power supply apparatus via said bus line and outputting the abnormality detection signal to said abnormality control circuit, wherein said abnormality control circuit controls said voltage generation circuit to stop generation of the voltage in a case where the abnormality control circuit receives the abnormality detection signal from the abnormality detection circuit or in a case where the abnormality control circuit receives the abnormality detection signal from said interface circuit.