A fieldbus solenoid valve system has a solenoid operated control valve mounted and operated by a solenoid pilot. A direct current power source is connected to a coil of the solenoid pilot and a driver for actuating the coil. A resistive element is in series with the power source, the driver, the solenoid and a ground. A frequency generator is connected to the circuit for creating a frequency pulse train to the coil having a characterization so as not to cause the solenoid pilot to actuate. The voltage is measured between the coil and resistive element and the measured voltage is compared to a base voltage value measured from the same circuit location. An indicator signal is displayed on the fieldbus solenoid valve system or externally when the measured voltage increases to a predetermined amount from said base voltage over time.

An embodiment of the present disclosure relates to an industrial rechargeable wireless solenoid valve system, and a technical problem to be solved is to provide an industrial rechargeable wireless solenoid valve system which is controlled by a wireless control signal and receives power supplied from a rechargeable battery. To this end, the present disclosure provides an industrial rechargeable wireless solenoid valve system comprising: a wireless communication unit for receiving a command from a factory control unit; a solenoid valve control unit which receives input of the command from the wireless communication unit to output an operation signal corresponding to the command; an output unit which receives input of the operation signal from the solenoid valve control unit to drive a solenoid valve; and a power supply unit for supplying power to the wireless communication unit, the solenoid valve control unit, and the output unit, respectively.

Hydraulic control comprising at least one hydraulic valve, each hydraulic valve comprising a hydraulic distributor and an electric actuator. The hydraulic distributor comprises a valve slide mounted with the ability to slide in a body comprising hydraulic ports. The electric actuator is fixed to the body of the hydraulic distributor and comprises an electric motor, an electronic circuit comprising a circuit board, a linear-displacement output member coupled to the control slide, reduction gearing comprising gear wheels coupling the motor to the output member, and a housing in which the electric motor, the electronic circuit and the reduction gearing are mounted.

Techniques involve a hydraulic valve module having at least one hydraulic valve with a valve slide which can be adjusted by way of an electric actuator in order to supply hydraulic lines with hydraulic liquid by way of the hydraulic valve. The hydraulic valve module has a controller and an electric energy store. The controller and the electric energy store are set up to move the valve slide out of every possible valve slide position into a deactivation position by way of the electric actuator and energy which is stored in the electric energy store. This allows the safe operation of hydraulic valves without a restoring spring, wherein valves of this type and the actuators thereof can be of smaller and less expensive construction than in the case of conventional valves with a restoring spring.

A work machine is adapted for reduced fuel consumption in regions where swinging by a hydraulic motor is prone to deterioration in efficiency, such as when the operating stroke of the swinging is small. The work machine includes an engine, a hydraulic pump, a swing structure, an electric motor for driving the swing structure, and a hydraulic motor for driving the swing structure, the hydraulic motor being driven by the hydraulic pump, and includes a swing control lever device that commands the swing structure to be driven. A control device operates in either an electric swing mode in which the swing structure is driven mainly by torque of the electric motor or a hydraulic swing mode in which the swing structure is driven mainly by torque of the hydraulic motor, depending on an operating stroke of the control lever device and/or a swing speed of the swing structure.

In a control unit of an electromagnetic valve system, a safety circuit includes a first switch and a second switch for switching, by control from a control circuit supply and shutdown of power from a drive power supply to an electromagnetic valve drive circuit. A common line extends to a plurality of electromagnetic valve units and is connected to one end of a plurality of solenoids. A plurality of power lines are connected to the other end of each of the plurality of solenoids. The electromagnetic valve drive circuit includes a plurality of open/close switches for switching, by control from the control circuit, supply and shutdown of power to the plurality of solenoids.

A supply module includes an electrical control input and an electrical supply input as well as an electrical control output and an electrical supply output, as well as a control line arranged between the control input and the control output, which is designed for the transmission of control information, wherein at least one supply line group is assigned to the electrical supply input, which group includes a supply feed line and a supply outlet line, which are each extended between the electrical supply input and the electrical supply output, and which includes a switching module which is coupled to the control line and which has a feed switch arranged in the supply feed line, wherein a consumer output is formed for an electrical supply of an external consumer and is connected via an output feed line to the supply feed line and via an output drain line to the supply outlet line, the output feed line being connected between feed switch and the electrical supply output.

A valve has a valve housing which is connected to an electronics unit. The electronics unit has an electronics unit housing which has an aperture in order to establish electrical contacting with an actuator of the valve. A portion of the actuator may protrude into the aperture. Here, play is provided between the aperture and the portion of the actuator.

A supply module includes an electrical control input and an electrical supply input as well as an electrical control output and an electrical supply output, as well as a control line arranged between the control input and the control output, which is designed for the transmission of control information, wherein at least one supply line group is assigned to the electrical supply input, which group includes a supply feed line and a supply outlet line, which are each extended between the electrical supply input and the electrical supply output, and which includes a switching module which is coupled to the control line and which has a feed switch arranged in the supply feed line, wherein a consumer output is formed for an electrical supply of an external consumer and is connected via an output feed line to the supply feed line and via an output drain line to the supply outlet line, the output feed line being connected between feed switch and the electrical supply output.

In a control unit of an electromagnetic valve system, a safety circuit includes a first switch and a second switch for switching, by control from a control circuit supply and shutdown of power from a drive power supply to an electromagnetic valve drive circuit. A common line extends to a plurality of electromagnetic valve units and is connected to one end of a plurality of solenoids. A plurality of power lines are connected to the other end of each of the plurality of solenoids. The electromagnetic valve drive circuit includes a plurality of open/close switches for switching, by control from the control circuit, supply and shutdown of power to the plurality of solenoids.