Why suggest the terminal box option?2020.10.19
Automatic control is easily achieved with a minimum of items.
Switches, relays and regulators are required to operate the motorized valve.
Naturally, a control box is required at the installation site to house these items.
If many electric valves, sensors, pumps, etc. are installed in the same facility, the cost ratio of the control box is not so high.
However, if you want to install only one motorized valve at a site, isn't the cost of the control box, wiring, and installation costs a hurdle to introducing a motorized valve?
We believe that the demand for automation will increase even in smaller facilities in the future.
Therefore, we are proposing an motorized valve that can be introduced without a control box so that it can be used in a wider range of applications "easily".
Local control unit
The motorized valve can be operated directly with the control buttons built into the terminal box.
The motorized valve can be used simply by preparing an electric power supply.
Even in an environment where an operation panel is installed, inspection work can be performed efficiently because the valve can be operated while viewing the valve.
Digital Indicating Controller Unit
PID control can be achieved by simply connecting thermocouples, resistance temperature sensors, and sensors corresponding to current / voltage signals.
Various settings can be easily made while checking on the LCD display. New PID algorithm improves controllability and shortens the time from the start of control to stability. Selectable PID control types are Normal, Overshoot Suppression (Low, Medium and High) and Disturbance Suppression.
Calendar timer unit
A digital daily time switch is built into the terminal box. It can be programmed and controlled simply by connecting the power supply.
It operates the motorized valve at the set time.
It can be set to operate at the same time every day, or to change the pattern of operation depending on the day of the week, etc. for a wide range of situations.
In addition to the control panel-less model, we are also considering a model with a simple and cost effective layout by enclosing peripheral equipment in a terminal box.
The wiring between the operator and the auxiliary equipment can be integrated into a single box, making on-site wiring work more efficient and making wiring easier to handle.
The following functions are being considered for incorporation into the terminal box.
Flow Rate Conversion Unit
A valve with an equal percent characteristic can be used as a pseudo-linear characteristic by converting the input signal.
Intermediate Position Control Unit
By attaching a variable resistor to a motorized valve with a built-in potentiometer, the degree of opening can be adjusted with a knob.
If a separate open/close switch is provided, the valve can be operated remotely in three positions: fully closed, middle position, and fully open.
Alarm Output Unit
This unit has a no-voltage contact output when the lower limit or upper limit of the opening degree set by the proportional control electric valve is exceeded.
Long-distance wiring unit
This unit can operate and monitor up to 85 electric valves with just two wires.
There is no need to wire each electric actuator from the control box, and the number of wires can be reduced significantly by connecting them in series. After installation, the number of electric valves can be increased and the branching positions can be changed freely.
If there is any other function that you wish to use, please feel free to contact our sales department for more information.
We are looking forward to hearing from you.
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