| 摘要 |
PURPOSE:To supply a sufficient power to a slave machine, by taking out power from a power supply part by a repeating machine to transmit this power as power to the slave machine when power is transmitted from a host machine to the slave machine through a transmission line. CONSTITUTION:A host machine 4 transmits and receives signals to and from a slave machine 3 through a transmission line 1 and takes out power from a power supply line 2 to not only use this power as the power source of itself but also transmit this power to the transmission line 1. A repeating machine 5 is provided on the transmission line 1 and takes out power from the power supply line and transmits this power to the transmission line 1 as power for the slave machine on the opposite side of the host machine. A load 6 of each slave machine is an illumination load, a sensor, or the like. Thus, each slave machine 3 does not require a power supply part including a large-size transformer, etc.; and even if the length between the host machine 4 and slave machines 3 is longer or the number of slave machines 3 is large, each slave machine 3 is operated surely because power is supplied to each slave machine 3 from the repeating machine 5. |
