Unipulse F160, Руководство по эксплуатации

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6
2 CONNECTION
6
CO
NNECTI
ON
Chapter
2
■
Load Cell Signals
■
Connecting Load Cells in Parallel
Some industrial applications require several load cells connected in parallel (e.g., tank or flow
scales). A summing junction box should be used to facilitate connection and corner correction.
+EXC
+S
-S
-EXC
+SIG
-SIG
SHIELD
+IN
-OUT
-IN
+OUT
(4-wire does not have +S and -S.)
R
R
R
R
R
R
+EXC
-SIG
+SIG
-EXC
+EXC
-SIG
-EXC
+SIG
F ・ G
+S
-S
‘n’ (number) load cells connected in
parallel are considered one unit whose
capacity is ‘n’ x rated capacity of load
cells (load cells must have the same
capacity, bridge resistance, and mV/V).
The averaging resistor (R) must be in
same relative ratios with a low
temperature coefficient.
Averaging resistors are not needed if
load cells were designed for parallel
connection.
R
R
When connecting several load cells in parallel, load cell capacity should be higher than
expected load to compensate for mechanical shock or eccentric loading.
Attention