How does the conventional system control the electric valve interlock?
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I just started designing and I encountered such a problem. Please tell me. The process requires that the electric valve can feedback the operating status and fault status, and the electric valve can automatically switch according to a certain temperature, but there is no DCS or PLC control system. How to make a conventional control system based only on a certain temperature to realize the switch control of the electric valve? Thanks.
Use a digital display with an alarm node output to display the temperature, and control the action of the electric valve based on the alarm value. Manual operation of the on-site operation button can be added on-site to realize on-site operation of the electric valve and switching of temperature interlock. The switching status and fault of the electric valve can be displayed by a four-way alarm.
The electric contact thermometer can be used to realize automatic switching, and feedback and faults can be realized through the valve position switch.
The control of the electric valve can be achieved by using a digital display with alarm. fault status: Generally, electric valves have a torque contact output and it should be enough to connect it to the alarm.
2# chmyh switch feedback, etc. Is it possible to connect a power supply and a light bulb to display it? For example, if the light is on, it means the valve is closed, and if the light is off, it means the valve is open.
The operation and fault alarm of the valve can be directly connected from the wiring of the electric valve. Generally, electric valves have them, and they can be connected to an alarm. As for the temperature control switch, the temperature controller lead-out line can be used to connect to the control line of the electric valve. It is the same as using system control. It is not possible to add a relay.