Composite system

摘要

A composite system includes a first and a second devices operated with taking an own power source device as a driving source. The system comprises a signal line connecting loads of the first and second devices so that the first and second devices operate in cooperation with each other; and a power source line connecting a first line connecting the first power source device and the load of the first device via a diode and a second line connecting the second power source device and the load of the second device via a diode so that the first and second devices can operate with taking the power source device of the counterpart device as the drive source.