Interlock diagram between the emergency shut-off valve and the high liquid level alarm of the level gauge

The following is the interlock diagram for the emergency shut-off valve and the high liquid level alarm of the level gauge: !(https://i.loli.net/2021/08/01/4NlEKUVHn8JvYgm.png) As shown in the diagram, when the level gauge detects that the liquid level in the tank is above the set value, it will send a high liquid level signal. At this point, the high liquid level signal is transmitted to the PLC controller via the interface board. The controller identifies this signal as an alarm indicating a high liquid level, and then issues a command to close the emergency shut-off valve, thereby forcing it to shut down in order to prevent dangerous situations such as tank explosions caused by excessive liquid levels. It should be noted that this interlock diagram is for reference only; the interlock relationships in the actual system should be designed and optimized based on specific conditions to ensure optimal safety performance. .