SIGNAL CHANGEOVER APPARATUS

• Main Author: MATOBA TERUO
• Format: Patent
• Language: English; Japanese
• Published: 10.09.2020
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

To obtain a signal changeover apparatus capable of preventing a false detection such that a disconnection occurs when a signal is changed over.SOLUTION: A signal changeover apparatus includes: a first signal changeover device (2) which selects either one of input signals from two controllers (51 and 52), respectively, on the basis of an external changeover signal, and which outputs the selected input signal to a process; and a second signal changeover device (3) that forms a return circuit so as not to form an open circuit for the other input signal not selected by the first signal changeover device in the input signals from the two controllers, respectively, on the basis of the changeover signal.SELECTED DRAWING: Figure 1 【課題】信号切り替え時に断線が発生したと誤検出してしまうことを防止することのできる信号切替装置を得る。【解決手段】信号切替装置は、外部からの切替信号に基づいて、２台のコントローラ（５１、５２）のそれぞれからの入力信号のうち、いずれか一方を選択し、選択した一方の入力信号をプロセスに出力する第１の信号切替デバイス（２）と、切替信号に基づいて、２台のコントローラのそれぞれからの入力信号のうち、第１の信号切替デバイスによって選択されなかった他方の入力信号に関して、開回路とならないように折返し回路を形成する第２の信号切替デバイス（３）とを備える。【選択図】図１