| 摘要 |
PURPOSE:To ensure the fault monitor through a simple method for all signal systems, by informing the start and release signals to the system of the electronic exchange by the scan-in interface and then transmitting the answer signal to the monitor control unit after receiving it via the relay control. CONSTITUTION:With operation of the start relay of fault monitor controller 15, the contact (st) is closed. And then relay D of artificial trunk unit 14a operates to close its contact (d) and then to inform the closure to R of scan SCN. Thus R is read at the system, and then relays S and T of RC are operated via the answer signal and relay control RC. With this operation, contacts (t) and (s) are closed, and then relay REC of controller 15 operates to confirm the reception of the signal. For the release, contsct (st) is opened to break the display of R. And the opening is confirmed for relay REC after opening relays S and T. At the same time, relay SUP operates when the power supply is cut, thus closing relay contact (sup) of controller 15. |
