Cable Extension; Parallel Connection - HBM C16A Manuel D'emploi

C16A
7.3

Cable extension

Only use shielded, low-capacitance measurement cables
for extending. Ensure that connection is perfect, with a
low contact resistance.
The cable of a six-wire transducer can be extended with
a cable of the same type.
7.4

Parallel connection

Only load cells with an aligned output (nominal (rated)
sensitivity and output resistance) are suitable for parallel
connection. The load cells can be wired in parallel by
joining the load cell cable core ends of the same color.
The type VKK terminal boxes or the VKK2R-8 Ex version
for potentially explosive areas are available in the HBM
product line for this purpose. The output signal is then
the average of the individual output signals.
Important
Overloading in an individual load cell cannot then be de­
tected from the output signal after load cells have been
connected in parallel.
The load cells have a bridge resistance of 700 W. This
results in lower loading of the amplifier, particularly for
parallel connection of more than four load cells, e.g. in
modular compound scales, compared to bridge resist­
ances of 350 W. The C16A can therefore be used to op­
erate weighing electronics limited by the input power us­
ing twice as many load cells as would be possible with a
350 W bridge resistance.
A1460-4.0 HBM: public
Electrical connection
23