SD600P Constant Water Pressure Control VFD

Multi-pump connection means that in the water supply control system, multiple VFD are connected through communication, and the master VFD or the upper controller controls multiple water pumps to perform actions such as start-up, speed regulation, and VFD shifting to meet the requirements of constant-pressure water supply. In many constant water pressure sytems,they still use PLC to realize the multi-pump online control, which not only increases the cost, but also involves some complicated work such as programming. Sinovo SD600P VFD can realize multi-pump online control without PLC, and can also use the auxiliary VFD as a backup master VFD.

1. Automatic Pressure Regulation

Maintains stable outlet water pressure by adjusting motor speed based on real-time pressure feedback.

2. Built-in PID Control

Integrated PID (Proportional-Integral-Derivative) controller ensures precise and smooth pressure regulation.

3. Sensor Feedback Support

Supports pressure sensor input (analog 4–20 mA or 0–10 V), enabling closed-loop control for real-time adjustment.

4. Energy Saving

Reduces motor speed during low water demand, significantly lowering energy consumption and operational costs.

5. Soft Start/Stop Function

Prevents water hammer and mechanical stress, extends the lifespan of pumps and pipelines.

6. Multi-Pump Control (Optional)

Supports control of multiple pumps in sequence or parallel operation for large systems (duty/standby rotation).

7. Sleep/Wake-up Function

Automatically stops the pump during low demand and restarts it when pressure drops, enhancing efficiency.

8. User-Friendly Interface

Easy parameter setting through digital keypad or HMI, with real-time pressure and frequency display.

9. Protection Functions

Comprehensive protections: overvoltage, undervoltage, overload, dry-run, sensor failure, etc.

10. Remote Monitoring & Communication

Supports Modbus/RS485 and other protocols for remote control, monitoring, and data logging.