Bronkhorst IQ+FLOW (till 01-07-2013) - Manual (Page 16)

9.17.045 page 16
3.5 Basic RS485 operation
This section is limited to the description of the interface between the IQ + FLOW® instrument with a master device.
IQ + FLOW® instruments always serve as slaves in a Modbus system. There is no mutual communication between
Modbus slaves; only between master and slave. The master device is for example a pc.
More detailed information about Modbus can be found at http://www.modbus.org or any website of
the (local) Modbus organisation of your country (when available).
Hook-up
The figures below show examples of a number of IQ + FLOW® instruments in an RS485 bus-system. When the power
consumption is more than 15W, two seperated power networks are required due to the maximum power supply of
15 W for one PiPS.