frequency inverter, Water supply control card

1. Timing control: set eight pressure reference in specific time period 2. PID control: constant pressure regulation 3. Control up to 7 different pumps automatically according to pressure feedback, store specific rated current separately 4. Energy saving function: stop automatically when flow is smaller 5. Timing switchover function: prevent pump from rust, balance every pump lifetime 6. Over pressure/under pressure alarm, record the faulty pump and switch the spare pump automatically. 7. Dormant control 8. Built-in RS 232 9. Liquid level detection and control