| 摘要 |
PURPOSE: To easily add or eliminate unit devices by easily connecting the unit devices by a transmission cable. CONSTITUTION: A relay connector 15 for a transmission cable is arranged correspondingly in the room of each unit 2 within an external box 1 and the relay connector 15 and the connector part of the multi relay of the corresponding unit devices are connected via a transmission cable or a relay box for a multiple-station transmission cable is provided in the external box 1 and a transmission cable is pulled out of the relay box for the multiple-station transmission cable only for a required unit device and is connected to the connector part of the mutli-relay of the corresponding unit devices. |
