I have a question regarding a circuit diagram for automatic level control.
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A new sump tank has been added to the factory, and it is required that the start and stop of the water pump be automatically controlled based on the liquid level (start when the level is high, stop when it is low). We have now added a radar level gauge, along with a secondary display. Control is achieved through the alarm relay output of this secondary display; both the high/low level alarms and the position alarms from this display are of the normally open type. A two-position switch is used to switch between manual and automatic mode. We would appreciate it if someone experienced could advise us on how to draw the circuit diagram.
When the high-level signal is detected, the pump starts; when the low-level signal is detected, the pump stops. It is advisable to use an intermediate relay for isolation