Unipulse F805AT-BC, Руководство по эксплуатации

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4.SIGNAL CONNECTION
18
4-1-3. Connecting load cells in parallel
Some industrial measurement application use multiple of load cells connected in
parallel. An example of parallel connection is shown below:
4-1-4. Sensor cable
Cable colors of sensors may differ from one manufacturer to another (it may even differ
from one model to another for some products). Refer to the sensor manual (or data
sheet) and check signal names and colors in order to connect the cables correctly.
R
R
R
R
R
R
+EXC
-SIG
+SIG
-EXC
+EXC
-SIG
-EXC
+SIG
SHIELD
+S
-S
As seen from the instrument, n
load cells connected in parallel
behave as if they constitute a single
load cell with the same sensitivity.
Acceptable results can only be
obtained using load cells that have
average resistance of 300-500
Ω
with uniform relative ratio, and
low temperature coefficient.
Av e r a g i n g r e s i s t o r s a r e n o t
r e q u i r e d f o r t h e l o a d c e l l s
originally designed for parallel
connection applications.
Note
When connecting several load
cells in parallel, select load
cells with sufficiently high
capacity so that shock or
eccentric loading may not
result in overloading condition
in any one of the load cells.
R
R