| 摘要 |
PURPOSE:To suitably operate a device with a simple circuit constitution, by a specific slave device manually operated for transmission from the slave device to a master device, simultaneously calling out all the slave devices from the master device and returning them to the original state simultaneously. CONSTITUTION:A diode 15 is connected so that a reverse DC current only flows to a polarized relay 16 via a channel transmission line 9. A manual operation type channel switch 19 which is connected in parallel with this diode 15 and flows a given direction of current to the relay 16 through closing is provided. In each slave device B, a switch 19 is closed and a specified direction of DC current flows to the relay 16 from a master set A to make self-hold the relay 16. A polarized selector switch 4 is switched at the master set A, and opposite direction of DC current flows to the relay 16 of all the slave devices, allowing to release the self-hold state of all the slave devices at a bundle. |
