Digital (fieldbus) technology
About digital "multibus" mass flow & pressure meters and controllers
Digital = Standard
All mass flow and pressure meters/controllers are equipped with a digital pc-board, featuring self-diagnostics, alarm and counter functions, digital communication and remotely adjustable control settings. These digital instruments from Bronkhorst High-Tech offer great flexibility thanks to the "multibus" concept, whereby the instruments can be equipped with an on-board interface with DeviceNetTM, Profibus-DP®, Modbus, EtherCAT or FLOW-BUS protocol.
General specifications
- based on a 16-bit micro controller with FLASH memory
- analog input/output: 0...5 Vdc, 0...10 Vdc, 0...20 mA, 4...20 mA (sourcing)
- valve output can be monitored
- 2 LED's for status indication
- 1 multi-functional switch for digital functions
- rotary switches for selecting the node address and the DeviceNetTM data rate
- configuration software for operation and service is available (through RS232)
- best accuracy +/- 0,5% of reading plus +/- 0,1% full scale (based on actual calibration)
- up to 8 calibration curves
- Gas MFC's with fast response - settling times down to 150 msec (see graph)
 |
|
Click here to visit our software download section >> |
Fieldbus specifications
Profibus
Bronkhorst High-Tech Mass Flow Meters/Controllers can be directly used as PROFIBUS-DP® slaves. By using the SPC3-Asic of Siemens Baud rates of up to 12 MBaud can be achieved.
DeviceNet
The DeviceNetTM interface was developed in accordance with SEMI E54, the standard for sensors and actuators.
Modbus
Bronkhorst® Mass Flow Meters/Controllers can be connected to Modbus as a Modbus slave.
EtherCAT
Bronkhorst Mass Flow and Pressure Meters/Controllers can be supplied as EtherCAT® slave devices. This fieldbus system offers short cycle times with low communication jitter and low hardware costs.
FLOW-BUS
FLOW-BUS is a fieldbus, designed by Bronkhorst High-Tech BV, based on RS485 technology, for digital communication between digital devices, offering the possibility of host-control by PC.
