2.CONNECTION
8
2-2-3. Connecting Load cells in Parallel
Some industrial applications require multiple of load cells connected in parallel
to configure, for example, a hopper scales or track scale. A typical parallel
connection is shown below.
Parallel connection can easily realized using the 4-point multi load cell summing
box (e.g. B41X series provided by UNIPULSE).
R
R
R
R
R
R
+EXC
-SIG
+SIG
-EXC
+EXC
-SIG
-EXC
+SIG
F
・
G
+S
-S
Seen from F159, the parallel
c o n n e c t i on o f n l o a d c e l l s i s
considered to be a single load cell
with a capacity multiplied by n and
the same sensitivity with the
constituent load cells.
The averaging resistor (R) takes the
value between 300 and 500
Ω
, with
the same relative ratio and low
temperature coefficients. They are
not required if the load cell is
specifically designed for parallel
connection application.
If you connect multiple of load cells in parallel, use load cells with extra capacity margin.
Biased loading or mechanical shock may result in overload in some of the cells.
R
R
Request
CAUTION
Parallel connection of multiple of
load cells can drastically change
power consumption.
P o w e r s u p p l y w i t h s u ff i c i e n t
capacity should be selected. See
next page for proper evaluation of
power requirement.
