| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation switch wiring tool for a load control system capable of confirming a decrease in power supplied to the operation switch wiring tool from the outside and easily discriminating causes when on/off control of a load by operation of an operation switch does not work.SOLUTION: The operation switch wiring tool 1 is connected to a control master 101 and control slaves 102, 102 for controlling a relay for turning on/off power supply to a load such as an illuminator via a two-wire transmission line Ls. The operation switch wiring tool 1 includes a liquid crystal display part 48 for visually displaying an address allocated to an operation switch 21, a control part 41 for outputting a return signal S2 to the transmission line Ls according to pressing of the operation switch 21, and a power supply part 43 for generating an internal power supply by performing full-wave rectification of a transmission signal S1 inputted to the signal line Ls. The control part 41 displays operation "E1" on the liquid crystal display part 48 when a voltage value of the transmission signal S1 becomes lower than a prescribed value. |
