Bronkhorst FLOW-BUS interface User Manual download pdf (Page 11)

BRONKHORST®

2 FIELDBUSINSTALLATION

2.1 GENERAL

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FLOW‐BUSis a 3‐wire,RS485‐basedfield buscommunicationsystemfor parameter valueexchangebetweendigital

Bronkhorstproducts.Inthissystemeachinstrument/deviceisequippedwithamicro‐controllerforitsowndedicated

task but also for exchanging parameter value information with other instruments /devices connected to the sam

e

FLOW‐BUSsystem.

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FLOW‐BUSsystemsmayhaveaminimumof2andamaximumof126connections.Themaximumlengthfordatelines

between the first and the last connection may be up to approx. 600 meters. Longer distances are only possible in

combination with special bus‐repeater m

odules. Each instrument/device connection T‐part (stub) must be kept as

shortaspossible(maximumcablelength0.5meter).

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Thebaudrateusedtotransportmessagesis187500baudor400000*baud.

FLOW‐BUSisamulti‐masternetworkwithatoken‐ringarchitecture.

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*MBC3typeinstrumentshaveanadditionalbaudrateavailableof400000baud.

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FLOW‐BUSinterface9.17.024

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Bronkhorst FLOW-BUS interface User Manual Page 11