Products

Bedford B603PRO constant pressure water pump inverter

B603PRO

Suitable for pump rooms, booster systems and water supply applications where pressure feedback, pump coordination and fault protection are required.

product details

Product Overview

B603PRO is an intelligent controller for water pump systems. It is designed for constant pressure and constant differential pressure water supply, with support for multi-pump linkage and automatic operation after parameter setup.

The controller is suitable for pump rooms, booster systems and water supply applications where pressure feedback, pump coordination and fault protection are required.

Key Selling Points

Supports constant pressure and constant differential pressure water supply.
Controls up to five auxiliary pumps, supporting up to six pumps in linkage operation.
Manual/automatic switching can be controlled by terminal or keypad.
Supports synchronous, master-slave, big-small pump, one duty one standby, and one VFD drive two pumps linkage modes.
Compatible with pressure transmitter and resistance pressure gauge feedback.
Provides water supply alarms such as low pressure, high pressure, low inlet pressure and low water level.

Core Parameters

Item	Details
Input / output, 220V single phase	AC 1PH 220V input, AC 3PH 0-220V output
Input / output, 220V three phase	AC 3PH 220V input, AC 3PH 0-220V output
Input / output, 380V three phase	AC 3PH 380V input, AC 3PH 0-380V output
Power range	220V: 0.75kW to 55kW; 380V: 0.75kW to 200kW
Rated output current range	220V: 4.5A to 210A; 380V: 2.1A to 380A
Feedback input	0/4-20mA pressure transmitter or resistance pressure gauge
Auxiliary power	+24V output for pressure transmitter, maximum 200mA
Communication	RS485 communication interface
External dimension range	Varies by power, from about H186 x W126 x D163.8mm to H870 x W503 x D362mm

Model Coverage

Model / Voltage Class	Power Range	Notes
B603PRO-2001 to B603PRO-2075	0.75kW to 55kW	220V class
B603PRO-4001 to B603PRO-4270	0.75kW to 200kW	380V class

Interface and Control

Main circuit terminals include L/N, R/S/T, U/V/W, DC bus and grounding terminals according to power class.
AI1 and AI2 receive pressure feedback signals.
S1 to S4 provide ON/OFF digital input control.
AO supports 0-10V or 0-20mA analog output.
Two relay outputs can be used for alarm or valve switch signals, with contact capacity up to AC 250V 3A or DC 30V 1A.
RS485A and RS485B interfaces are available for communication; terminal resistance should be enabled only at the first and last devices in a multi-pump network.

Application Scenarios

Constant pressure water supply systems.
Constant differential pressure water supply systems.
Multi-pump booster systems.
Pump systems requiring automatic standby, pressure feedback and centralized control.

Installation and Use Notes

Set motor rated power, frequency, speed, voltage and current according to the motor nameplate before commissioning.
Confirm pump rotation direction with a short trial run before formal operation.
Set transducer range according to the pressure transmitter label.
Correct displayed pressure through the AI input lower and higher limit parameters when needed.

FAQs

What is B603PRO designed to do? ▶

B603PRO is a controller for water-pump systems. It can keep either pressure or the pressure difference between two points at a chosen level after the system has been set up correctly.

Can B603PRO control several pumps? ▶

Yes. A linked system supports up to six pumps, using a controller for each pump. The controllers must be connected and set up to work together.

Can B603PRO keep a constant pressure? ▶

Yes, it supports constant-pressure control with a suitable pressure sensor and settings. The result depends on correct sensor choice, pump size, pipework, and system setup.

What is constant differential pressure? ▶

It controls the difference in pressure between two measured points, rather than one pressure reading. Use it only when the system has the required pressure measurements and was designed for this type of control.

Can pumps take turns doing the main work? ▶

Yes. The controller supports pump alternation in linked-pump systems. Set the rotation according to how the pumps are used and maintained.

Does B603PRO stop when demand is low? ▶

It includes a sleep function for water supply. Set when it sleeps and starts again around the pipework and normal water use, so the system responds properly when demand returns.

Can I check the pressure reading on the controller? ▶

Yes. You can view the pressure reading on the controller when a suitable pressure sensor is connected and set up. Check that the displayed value agrees with the actual system pressure before normal use.

What should be prepared before installation? ▶

Prepare a matching pump motor, the selected B603PRO model, a pressure sensor, and a linked-pump plan if needed. Have trained personnel complete the electrical work and confirm all ratings.