Abstract: In a solenoid valve system, a plurality of first through third solenoid valve units are divided into a plurality of first through third groups. In this case, a safety power source control unit is provided for controlling the first through third solenoid valve units with respect to each of the first through third groups.

Abstract: In a solenoid valve system, a plurality of first through third solenoid valve units are divided into a plurality of first through third groups. In this case, a safety power source control unit is provided for controlling the first through third solenoid valve units with respect to each of the first through third groups.

Abstract: A solenoid-operated valve actuating controller actuates a solenoid-operated valve by energizing an actuating coil of the solenoid-operated valve in a rated mode, enough to move a movable member in the actuating coil, during a first period. Further, the actuating coil is energized in a power saving mode, during a second period after the first period. The solenoid-operated valve actuating controller has a timer circuit for setting the first period, an oscillating circuit for energizing the actuating coil in the power saving mode during the second period, and a control circuit for stopping an oscillating operation of the oscillating circuit during the first period based on an output signal from the timer circuit, and for energizing the actuating coil in the rated mode.

Abstract: A solenoid-operated valve controller includes a first signal line and a second signal line, which are connected respectively to ends of a first solenoid coil and a second solenoid coil. The first solenoid coil and the second solenoid coil have other ends, which are electrically connected in common to a switch. One of the first and second solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to the first and second signal lines, is selected, and the switch is turned on and off to control the selected one of the first and second solenoid coils.

Abstract: A solenoid valve drive control apparatus includes a MOSFET connected in series with the drive coil of a solenoid valve, a varistor connected in parallel with the drive coil, and a diode connected in parallel with the drive coil and the MOSFET. Due to the MOSFET being turned OFF, because the varistor immediately becomes conductive when a back EMF is generated in the drive coil, an electric current caused by the back EMF flows through a closed circuit constituted by the drive coil and the varistor.

Abstract: A control circuit turns a transistor on and off in order to energize a drive coil of a solenoid-operated valve in a rated voltage mode at a duty ratio of 100% during a predetermined first period, which is sufficiently long to move a movable element in the drive coil, from the time when an operation command signal starts being applied to the solenoid-operated valve. The control circuit further repeatedly energizes the drive coil in a power-saving mode at a duty ratio smaller than the duty ratio in the rated-voltage mode, during a predetermined second period following the rated-voltage mode. The drive coil is energized alternately in the rated-voltage mode and in the power-saving mode, until application of the operation command signal to the solenoid-operated valve is terminated.

Abstract: A solenoid-operated valve controller includes a first signal line and a second signal line, which are connected respectively to ends of a first solenoid coil and a second solenoid coil. The first solenoid coil and the second solenoid coil have other ends, which are electrically connected in common to a switch. One of the first and second solenoid coils, which corresponds to signal states of a plurality of input signals that are supplied respectively to the first and second signal lines, is selected, and the switch is turned on and off to control the selected one of the first and second solenoid coils.

Abstract: A solenoid-operated valve actuating controller actuates a solenoid-operated valve by energizing an actuating coil of the solenoid-operated valve in a rated mode, enough to move a movable member in the actuating coil, during a first period. Further, the actuating coil is energized in a power saving mode, during a second period after the first period. The solenoid-operated valve actuating controller has a timer circuit for setting the first period, an oscillating circuit for energizing the actuating coil in the power saving mode during the second period, and a control circuit for stopping an oscillating operation of the oscillating circuit during the first period based on an output signal from the timer circuit, and for energizing the actuating coil in the rated mode.

Abstract: A control circuit turns a transistor on and off in order to energize a drive coil of a solenoid-operated valve in a rated voltage mode at a duty ratio of 100% during a predetermined first period, which is sufficiently long to move a movable element in the drive coil, from the time when an operation command signal starts being applied to the solenoid-operated valve. The control circuit further repeatedly energizes the drive coil in a power-saving mode at a duty ratio smaller than the duty ratio in the rated-voltage mode, during a predetermined second period following the rated-voltage mode. The drive coil is energized alternately in the rated-voltage mode and in the power-saving mode, until application of the operation command signal to the solenoid-operated valve is terminated.

Abstract: To control a flow rate ranging from an extremely-low rate to a high rate, particularly, to control an extremely-low flow rate accurately, the following processes are executed. A regulator, a flow rate adjustment valve connected in series downstream of the regulator and adjusting a valve opening of its valve provided to a passage, and a flow rate sensor are provided. A regulator controlled degree and a valve opening controlled degree of the flow rate adjustment are found in accordance with a detection value and a target flow rate value to control the flow rate.

Abstract: To control a flow rate ranging from an extremely-low rate to a high rate, particularly, to control an extremely-low flow rate accurately, the following processes are executed. A regulator, a flow rate adjustment valve connected in series downstream of the regulator and adjusting a valve opening of its valve provided to a passage, and a flow rate sensor are provided. A regulator controlled degree and a valve opening controlled degree of the flow rate adjustment are found in accordance with a detection value and a target flow rate value to control the flow rate.

Abstract: An input-output unit for serial-parallel conversion has a simple structure and is capable of controlling various devices to be drive-controlled by a serial signal together or transmitting output signals from various sensors to a control system together by converting them into serial signals. For this purpose, the input-output unit has plural input-output blocks in series for inputting control signals into the various devices for transmitting output signals from the various devices, via an input-output connector, and a relay block having a serial terminal to be connected to the control system and a signal converter for converting between serial signals transmitted to and from the control system and parallel signals transmitted to and from the input-output blocks via a multipolar joint connector to be connected to each input-output block.

Abstract: A method of driving and controlling a solenoid-operated valve is provided. The solenoid-operated valve can be centrally controlled and managed and it is possible to easily respond to any system change.

Abstract: A signal input unit transmits detection signals derived from sensors such as switches, limit switches, or pressure switches to a programmable controller by means of serial transmission. A signal output unit transmits control signals from the programmable controller to control apparatuses such as solenoid-operated valve manifolds, indicator lamps, and buzzers by means of parallel transmission. The signal input units and the signal output units are integrated with each other into one unit and a number thereof is changeable. Further, an intermediate section and an end block are integrally assembled to the signal input units and the signal output units to construct a signal input/output apparatus.

Abstract: The present invention aims to permit an easy and reliable predicting of abnormality of a solenoid valve before failure, by detecting operating times of the solenoid valve and discriminating, from the operating times, whether the changeover operation thereof is normal or abnormal.

Abstract: A method of driving and controlling a solenoid-operated valve is provided. The solenoid-operated valve can be centrally controlled and managed and it is possible to easily respond to any system change.

Abstract: A moving member 18 of an actuator 10 comprises a moving block 50 wherein an opening 48 which allows a driving force transmission shaft 16 to be inserted from the direction perpendicular to the axis thereof. A controlling device 400 for the actuator controls the amount of current supplied to a rotation drive source 21 on the basis of the manipulated variable control signal outputted though a torque limiter 8 for controlling the torque for the rotation drive source 21 detected by a torque conversion means 10 to the level of a torque limit limit value signal.

Abstract: A signal input unit transmits detection signals derived from sensors such as switches, limit switches, or pressure switches to a programmable controller by means of serial transmission. A signal output unit transmits control signals from the programmable controller to control apparatuses such as solenoid-operated valve manifolds, indicator lamps, and buzzers by means of parallel transmission. The signal input units and the signal output units are integrated with each other into one unit and a number thereof is changeable. Further, an intermediate section and an end block are integrally assembled to the signal input units and the signal output units to construct a signal input/output apparatus.

Abstract: A manifold solenoid valve drive-controlled by serial signals permits extremely easy assembly and easy maintenance, and eliminates a possibility of erroneous wiring. For this purpose, compressed air is supplied and exhausted through manifold blocks 30 on which solenoid valves 20 are mounted and which are consecutively connected, and serial signals are transmitted to the respective solenoid valves. A fluid passage section 31 of the manifold block is provided with common passages 32 and 33 for air supply and exhaust that penetrate the respective manifold blocks 30, and channels 36 through 38 that communicate them with supply/discharge openings of the solenoid valves 20.