Installation
For
an
installation
of
two
or
more
sensors
in
a
RS485
network,
each
sensor
is
wired
parallel
to
the
others.
You
may
connect
up
to
32
units.
Make
sure
to
deactivate
the
preset
shunt
resistor
for
all
units
except
for
the
last
one.
The
position
of
the
switch
to
deactivate
the
shunt
you
can
see
on
the
electronic
board
in
the
figure
above.
Before
units
are
in
a
network
the
multidrop
address
needs
to
be
defined.
Each
sensor
must
have
a
unique
address!
The
following
figure
illustrates
the
wiring
of
sensors
in
a
multidrop
installation.
RxB
RxA
RS232/485
Adapter
unit 1
unit
before
last
last unit
with shunt
activated!
A
B
A
A
A
B
B
B
unit 2
Figure
22:
Wiring
the
RS485
Network
The
address
setting
can
be
done
either
through
buttons
or
through
software
alternatively
.
Addressing
through
Buttons
Press
the
<Mode>
button
until
“M”
becomes
visible.
Use
the
<Down>
and
<Up>
buttons
until
the
requested
address
appears.
Press
the
<Mode>
button
to
acknowledge
your
selection.
Addressing
through
Software
Alternatively
the
sensor
can
be
controlled
by
means
of
the
optional
available
software
DataTemp
MultiDrop.
32
MID
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