Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.

Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.

Abstract: An I/O module includes a base plate, a plurality of universal circuits, and an option module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal circuits correspond to the connection terminals. The universal circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option module is detachably provided in the base plate. The option module is provided between a first connection terminal of the connection terminals and a first universal circuit of the universal circuits. The option module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal circuit.

Abstract: An I/O module includes a base plate, a plurality of universal-circuits, and an option-module. The base plate includes a plurality of connection terminals. A plurality of field devices is electrically connectable to the connection terminals. The universal-circuits correspond to the connection terminals. The universal-circuits are provided on the base plate, and configured to perform an input of analog signals from the field device, an output of analog signals to the field device, an input of discrete signals from the field device, and an output of discrete signals to the field device. The option-module is detachably provided in the base plate. The option-module is provided between a first connection terminal of the connection terminals and a first universal-circuit of the universal-circuits. The option-module includes a first circuit configured to performing transmitting and receiving of signals between the first connection terminal and the first universal-circuit.

Abstract: An optical measuring apparatus, includes an optical branch element for splitting a measured light into plural lights, a time delay processing portion for giving a predetermined time delay to one split light of the measured light, an optical phase diversity circuit for outputting an in-phase signal component and an quadrature-phase signal component of the measured light by virtue of an interference between the measured light and a reference light between which a relative time difference corresponds to a time give by the time delay, while using other split light of the measured light or the measured light to which a process is applied by the time delay processing portion as the reference light, a data processing circuit for calculating at least one of an amount of change of an amplitude and an amount of change of a phase of the measured light, based on the in-phase signal component and the quadrature-phase signal component, and an optical time gate processing portion or an electric time gate processing portion

Abstract: Disclosed is a light measurement apparatus including: an optical branching device to branch light to be measured into a plurality of pieces; a time delay processing unit to give a predetermined time delay to one branched piece of the light; an optical phase diversity circuit to output an in-phase signal component and a quadrature-phase signal component of the light to be measured by interference of the light to be measured and a reference standard light whose relative time difference is a time given by the time delay, wherein the reference standard light is another branched piece of the light or the one branched piece of the light having been subjected the time delay; and a data processing circuit to calculate at least one of an amplitude variation and a phase variation of the light to be measured based on the in-phase signal component and the quadrature-phase signal component.