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4.SIGNAL CONNECTION
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:
+EXC
-SIG
-EXC
+SIG
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.
18
R
R
R
R
R
R
+EXC
R
-SIG
-EXC
R
+SIG
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 300-500Ω
with uniform relative ratio, and
l o w t e m p e r a t u r e c o e ff i c i e n t .
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
c a p a c i t y s o t h a t s h o c k o r
SHIELD
eccentric loading may not
+S
result in overloading condition
-S
in any one of the load cells.
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