Intelligent Multi-Pump VFD Controller for Constant Pressure Water Supply

AUSENIST provides intelligent multi-pump VFD control solutions for booster systems, commercial water supply, industrial pumping stations and constant-pressure water systems.

The 620 pump inverter platform can coordinate up to six pumps, using two master drives and up to four auxiliary drives.

Unlike a simple parallel pump system, AUSENIST multi-pump control includes redundancy, automatic fault bypass and timed pump rotation.

Dual-Master Backup

One of the key features is the dual-master architecture.

The system can use one main master and one backup master.

If the active master develops a communication failure, sensor problem or hardware fault, the backup master can automatically take over the control function.

This design improves water supply reliability in applications where system downtime can cause serious problems.

Typical applications include commercial buildings, hotels, hospitals, factories and industrial water supply.

Automatic Failed-Pump Bypass

A multi-pump system should not stop completely because one auxiliary pump fails.

When an auxiliary pump fault is detected, the AUSENIST control system can automatically skip the failed pump and start the next available unit.

This allows the remaining pumps to continue operating.

For facilities requiring continuous water supply, this function can significantly improve system availability.

Automatic Pump Rotation

If the same pump always starts first, it will accumulate more operating hours and wear faster than the others.

AUSENIST multi-pump control supports automatic timed rotation.

The documented default rotation interval is approximately 8 hours.

The system changes pump operating order so that running time can be distributed more evenly between pumps.

This helps extend overall pump-system service life.

Constant-Pressure Control

The inverter can automatically adjust pump speed according to water demand.

When demand increases, pump speed increases.

When demand decreases, pump speed decreases.

When demand is very low, intelligent sleep control can stop unnecessary operation.

When pressure drops again, the system can restart automatically.

The 620 platform uses PID control and intelligent sleep functions for constant-pressure water supply.

Dual RS485 Communication

The 620 series uses dual RS485 communication interfaces.

This provides the communication capability required for coordinated multi-drive operation.

For multi-pump water supply systems, communication between drives allows the controller to determine which pumps should start, stop or rotate.

Intelligent Protection

The system also includes pump-specific protection functions such as water-shortage protection, pipe-burst shutdown, high/low pressure alarms, phase-loss protection, anti-freeze and anti-rust functions.

These functions are particularly useful in unattended water supply systems.

Where Is Multi-Pump Control Used?

AUSENIST multi-pump VFD solutions can be used for commercial booster systems, residential buildings, factories, hospitals, hotels, water treatment systems and other constant-pressure applications.

Frequently Asked Questions

How many pumps can be connected?

The 620 platform can support up to six pumps in a coordinated system.

What is dual-master control?

Two master drives are used. If the active master fails, the backup master can take over control.

What happens if an auxiliary pump fails?

The system can skip the faulty pump and activate the next available pump.

Can pumps rotate automatically?

Yes. Timed rotation distributes operating hours between pumps.

Is RS485 supported?

Yes. The 620 series provides dual RS485 communication.

Request a Multi-Pump Solution

Send AUSENIST your pump quantity, motor power, voltage and required water pressure.

We can recommend an intelligent multi-pump VFD configuration for your system.

Website: www.ausenist.com