Bronkhorst®
Instruction Manual mini CORI-FLOW ML120
9.17.097G
14
2.7
Communication interface
The table below shows the different (fieldbus) interfaces that can be installed. LED indications and the use of the micro
switch button on top of the instrument are explained in
Analog/RS232
An analog and (digital) RS232 interface are always available on mini CORI-FLOW ML120 series instruments. A fieldbus
interface is optional.
·
The analog and RS232 interface are made available through a 9-pin D-sub connector on the side of the instrument
o
see
and
·
FLOW-BUS and Modbus communication is possible through the 9-pin D-sub side connector, as well as via an optional
fieldbus connector on the top of the instrument
o
see
·
All other fieldbus interfaces are strictly made available through a connector on top of the instrument
o
see
2.7.1
Analog or local interface
Connect the ML120 series instrument to the power supply/readout unit using a cable with 9-pin D-sub connector according
to the Bronkhorst® standard for the Sub-D9 connector.
Refer to the hook-up diagram for analog operation (document 9.16.119) or use a 9-pin D-sub loose-end cable (7.03.004 (3m),
7.03.536 (5m) or 7.03.537 (10m)) to connect the required signals.
Power
Analog output
Analog input
(controller)
: +15...+24 Vdc
: 0...5 Vdc / 0...10 Vdc
0...20 mA / 4...20 mA
: 0...5 Vdc / 0...10 Vdc
0...20 mA / 4...20
mA
The following analog signals are available through the 9-pin D-sub side connector:
·
Pin 2: measured value (analog output)
·
Pin 3: setpoint (analog input)
The factory selected analog interface (0…5 Vdc; 0…10 Vdc; 0…20 mA or 4…20 mA) can be found in the model key of the
instrument (see
) and in the pin description on the instrument label.
When operating the instrument through the analog interface it is possible to connect the instrument simultaneously to
RS232 for reading/changing parameters (e.g. settings or fluid selection).