A control two water supply frequency control circuit a

A control two (namely a frequency control two motors) Frequency constant pressure water supply control circuit shown in Figure 5-23. Figure, 1,2 fault output terminal; 6,7 anal

og feedback current input terminals; 6,8 is the analog output of the sub; 19, 20 to run forward terminal; 11, 20 programmable digital output terminal.

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