Pump station based on PLC constant pressure water supply control system. There are two water pumps in the system, which are driven by M1 and M2 motors and controlled by KM1, km2 and KM3 contactors. The system uses S7-300 PLC (CPU 313c, 16 input points, 16 output points), three edge inverter fr-a740, pressure sensor, float type liquid level switch and other control equipment. The pressure sensor of the water supply system is installed at the outlet of the pipe network, and the float level switch sensor for water level monitoring of the water storage tank is installed on the top of the water storage tank.<br>
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