Abstract: This control switching device includes: a first operating panel provided at a first place and having A1, A2 buttons connected to a first control device and B1, B2 buttons connected to a second control device; and a second operating panel provided at a second place and having a1, a2 buttons connected to the first control device and b1, b2 buttons connected to the second control device. The first control device includes a first determination circuitry which determines whether to shut down input/output to/from an input/output device located at the first place, using operation signals of the A1, A2, B1, B2 buttons from the first operating panel. The second control device also includes a second determination circuitry similar to the first determination circuitry.

Abstract: A plant control and monitoring device includes a communication card having a first wireless communication chip on which a first unique ID is recorded, a CPU card having a second wireless communication chip on which a second unique ID is recorded, an input card having a third wireless communication chip on which a third unique ID is recorded, and a power supply unit having a fourth wireless communication chip on which a fourth unique ID is recorded. The first wireless communication chip reads out a unique ID from the second wireless communication chip or the fourth wireless communication chip, and transmits a read out unique ID to a maintenance tool through a control network. In a plant control and monitoring system, when the maintenance tool receives a unique ID transmitted through the control network, the maintenance tool collates the received unique ID with an ID database.

Abstract: A process signal control and monitoring system, includes: a signal processing device which is installed on an outside of a nuclear reactor containment vessel, an internal electrical power source, an analog-digital conversion part, an internal communication part which transmits the digital signal to the signal processing device, an internal repeater, and an external repeater which transmits the received signal to a communication satellite. When electric power supply from the signal processing device is disconnected, the internal electrical power source supplies electric power which is charged in the rechargeable battery, to the analog-digital conversion part and the internal communication part; and the internal communication part judges whether communication with the signal processing device is continued or disconnected; and when the communication is judged to be continued, the internal communication part continues transmitting the digital signal to the signal processing device.

Abstract: This signal measuring device includes: one input circuit for receiving a process signal from each of first through Mth detection units; a signal switching unit for performing open/close switching between each detection unit and the input circuit; a signal processing unit connected to the input circuit and for processing the process signal; and a switching command unit for outputting, to the signal switching unit, a switching command signal that corresponds to an open/close time set such that one of the plurality of the detection units is connected to the input circuit, the switching command unit outputting, to the signal processing unit, a measurement command signal that corresponds to a stable measurement time which is set for each of the plurality of the detection units and after which the process signal inputted from each of the plurality of the detection units to the input circuit is stably measurable.

Abstract: A process signal control and monitoring system, includes: a signal processing device which is installed on an outside of a nuclear reactor containment vessel, an internal electrical power source, an analog-digital conversion part, an internal communication part which transmits the digital signal to the signal processing device, an internal repeater, and an external repeater which transmits the received signal to a communication satellite. When electric power supply from the signal processing device is disconnected, the internal electrical power source supplies electric power which is charged in the rechargeable battery, to the analog-digital conversion part and the internal communication part; and the internal communication part judges whether communication with the signal processing device is continued or disconnected; and when the communication is judged to be continued, the internal communication part continues transmitting the digital signal to the signal processing device.

Abstract: A plant control and monitoring device includes a communication card having a first wireless communication chip on which a first unique ID is recorded, a CPU card having a second wireless communication chip on which a second unique ID is recorded, an input card having a third wireless communication chip on which a third unique ID is recorded, and a power supply unit having a fourth wireless communication chip on which a fourth unique ID is recorded. The first wireless communication chip reads out a unique ID from the second wireless communication chip or the fourth wireless communication chip, and transmits a read out unique ID to a maintenance tool through a control network. In a plant control and monitoring system, when the maintenance tool receives a unique ID transmitted through the control network, the maintenance tool collates the received unique ID with an ID database.

Abstract: This signal measuring device includes: one input circuit for receiving a process signal from each of first through Mth detection units; a signal switching unit for performing open/close switching between each detection unit and the input circuit; a signal processing unit connected to the input circuit and for processing the process signal; and a switching command unit for outputting, to the signal switching unit, a switching command signal that corresponds to an open/close time set such that one of the plurality of the detection units is connected to the input circuit, the switching command unit outputting, to the signal processing unit, a measurement command signal that corresponds to a stable measurement time which is set for each of the plurality of the detection units and after which the process signal inputted from each of the plurality of the detection units to the input circuit is stably measurable.