BRONKHORST
®
Page
7
FlowDDE
9.17.067
2.2
RS232
ON
MULTIBUS
INSTRUMENT
The
RS232
interface
on
a
multibus
instrument
can
be
connected
to
any
RS232
V24
serial
(computer)
port.
Make
sure
to
respect
the
hook
‐
up
diagram.
Bronkhorst®
offers
special
cables
for
communication,
separating
the
RS232
lines
from
the
power
and
analog
in
‐
and
output.
On
the
9
‐
pin
male
D
‐
sub
connector
of
the
instrument
RX
and
TX
are
available
on
pin
6
and
pin
1.
Serial
RS232
communication
on
a
multibus
instrument
with
RS232
can
be
treated
as
a
FLOW
‐
BUS
system
with
one
instrument
and
a
FLOW
‐
BUS/RS232
interface.
In
case
a
FLOW
‐
BUS
fieldbus
connection
is
present,
other
instruments
connected
to
the
FLOW
‐
BUS
can
be
communicated
with
as
well.
RS232
communication
is
possible
by:
9
‐
pin
Sub
D
‐
connector
(non
‐
IP65
instruments,
e.g.
EL
‐
FLOW)
8
‐
pin
DIN
connector
(IP65
instruments,
e.g.
CORI
‐
FLOW)
For
the
exact
connections
please
advise
your
hook
‐
up
diagram.
2.2.1
Applications,
e.g.
EL
‐
FLOW
FLOW
mass flow meter/controller
Power
Supply
Instrument
supplied
through
the
D
‐
sub
DB
‐
9
connector
FLOW
mass flow meter/controller
For
proper
cable
installation
please
consult
the
applicable
hook
‐
up
diagram
mentioned
in
paragraph
1.2.2
By
default,
the
interface
offers
communication
at
a
baud
rate
of
38400
baud.
On
instruments
that
offer
the
possibility
to
change
the
RS232
baud
rate,
the
baud
rate
may
be
configured
differently.
See
the
technical
documentation
of
your
instrument
which
baud
rates
are
supported.
