Bronkhorst®
Instruction Manual EL-FLOW® Select9.17.099F 15
2.7.1 FLOW-BUS
FLOW-BUS is a Bronkhorst® designed fieldbus, based on RS485 technology, for digital communication between devices,
offering the possibility of host-control by a Windows computer.
Characteristics:
· Baud rate 187500 (default) or 400000 Baud
· +15…24 Vdc supply voltage
· Easy installation and communication with other Bronkhorst® devices
· Automatic node search and bus optimization (gap fixing)
· RS232 communication (ProPar) with Windows computer (local host)
· Connection of up to 120 instruments on a single bus
· Maximum bus length: 600 m
Consult Instruction manual FLOW-BUS interface (document no. 9.17.024) for more information about setting up a
FLOW-BUS network.
2.7.2 Modbus
Modbus is a 3-wire, RS485-based fieldbus communication system for parameter value exchange. In this system each
instrument/device is equipped with a micro-controller for its own dedicated task. The instrument behaves as a slave, which
means all communication (instructions and readout) is initiated by a master device on the Modbus system.
Characteristics:
· Baud rate selectable between 9600 and 256000 Baud (default: 19200 Baud)
· +15…24 Vdc supply voltage
· Connection of up to 247 instruments on a single bus
· Supports RTU and ASCII protocols
Consult Instruction manual Modbus interface (document no. 9.17.035) for more information about setting up a
Modbus network.
2.7.3 PROFIBUS DP
PROFIBUS DP is a 2-wire, RS485-based industrial data communication standard (fieldbus) which allows automation
components (e.g. sensors, actuators and controllers) to exchange information.
Consult Instruction manual PROFIBUS DP interface (document no. 9.17.025) for more information about setting up a
PROFIBUS DP network.
2.7.4 DeviceNet™
The DeviceNet™ interface offers a direct connection to a DeviceNet™ network, according to the mass flow controller profile
specified by the ODVA. The Bronkhorst® DeviceNet™ instrument is a Group 2 Only Server device whose messages comply
with the Controlled Area Network (CAN) 2.0A standard and with the DeviceNet™ protocol.
Consult Instruction manual DeviceNet™ interface (document no. 9.17.026) for more information about setting up a
DeviceNet™ network.
2.7.5 EtherCAT®
Ethernet for Control Automation Technology (EtherCAT®) is an open high performance Ethernet based fieldbus system.
Consult Instruction manual EtherCAT® interface (document no. 9.17.063) for more information about setting up an
EtherCAT® network.
2.7.6 PROFINET
The PROFINET interface is 100% Ethernet compatible and is used for data exchange between I/O controllers (PLC, etc.) and
I/O devices (slaves, field devices). PROFINET uses the proven communication model and application view of PROFIBUS DP.
Consult Instruction manual PROFINET interface (document no. 9.17.095) for more information about setting up a
PROFINET network.
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