How to use FLOW-BUS fieldbus communication with Bronkhorst FlowSuite software?

What is FLOW-BUS?

FLOW-BUS is a fieldbus designed by Bronkhorst; based on RS485 technology for digital communication between multiple digital devices. This communication protocol offers the possibility of host-control by PC.

Learn more about FLOW-BUS

What is Bronkhorst FlowSuite?

Bronkhorst FlowSuite is a Windows PC application for monitoring and service purposes on Bronkhorst digital instruments via a single interface or with multiple windows for multiple devices. It offers good insight into the dynamic behaviour of our flow meters and controllers.

Read more about Bronkhorst FlowSuite

How to connect FLOW-BUS and Bronkhorst FlowSuite in practice?

Bronkhorst instruments are equipped with a micro-controller for exchanging parameter value information with other instruments / devices connected to the same FLOW-BUS system and/or via RS232 to a PC.

Here are some examples how you can install Bronkhorst instruments correctly using FLOW-BUS with Bronkhorst FlowSuite:

  • Bronkhorst instruments are connected via FLOW-BUS, RS485 (red cables).
  • PC USB port connects via RS232 to the first device (green cable).
  • Bronkhorst FlowSuite™ displays the PV (Process Variables), controls the SP (Setpoint), generating up to 4 graphs. The amount of devices which can be logged depends on your hardware.
  • Standard RJ45 Shielded (F)TP patch cable or M12 cable supplies the FLOW-BUS signal and 24 Vdc power.
  • 1A @ 24Vdc or 24 Watts is the max power for RJ45 Shielded (F)TP patch cable, 4A for the M12 cables.

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Example: Vapour (CEM) System

Vapour System with E-8000 power supply
Bronkhorst Vapour System with 24 Vdc power supply

Example: mini CORI-FLOW Coriolis flow meter

Coriolis flow meter with Power Supply
Bronkhorst mini CORI-FLOW flow meter with 24 Vdc Power Supply

Example: EL-FLOW Prestige thermal flow meter

EL-FLOW Prestige flow meter with Power Supply
Bronkhorst EL-FLOW Prestige flow meter with 24 Vdc Power Supply

Other considerations:

FLOW-BUS and Modbus is a LINE topology serial communication protocol over RS485. Each instrument must be “daisy chained” one after another with begin and end resistors.

  • Max cable length from Multiport Adapter to Device is 0.5m (20”)
  • LINE Topology 
  • STAR Topology = FORBIDDEN
  • Is not like a PoE Ethernet Switch and not to be connect like an Ethernet switch.