Powerful constant pressure water supply system can be realized without special water supply controller or PLC. What you need is only one more SWS board.

Inverters driving fixed and circuit systems are for your choice:
In fixed mode, one inverter can drive up to 7 pumps;
In circuit mode, one inverter can drive up to 4 pumps
*Featured by automatic control function with auxiliary pump;
*"Stop controlled pump "and "Stop all" are selectable;
*Pressure display function (when pressure Mpa is set directly);
*Multible pressure setting mode (frequency unit, Mpa, potentiometer);
*Frequency conversion alarm automatic switching industrial frequency running function;
*"First open and first close"and "first open and then close"two stopping pump sequences are available during "frequency conversion pump fix";
*2nd pressure command can be set, and switched by external terminal;
*External terminal can be used to switch 2 types of add-subtract pump judgment time;
*Switching function of timing pump is for preventing deterioration of water pump due to longtime non-operation;
*Operation signal maintenance function is to maintain operation signal when the frequency transformer in cycling mode stops transiently.