Parallel Connection Of Several Weighing Modules; Connections Using The Four-Wire Technique; Cable Extensions - HBM C16M Serie Montageanleitung

6.1

Parallel connection of several weighing modules

Transducers can be wired in parallel by joining the transducer cable core ends
of the same color. In this case HBM program offers the junction boxes VKK...
and for use in Ex areas the junction box VKK...EX. The output signal of these
junction boxes is the an average of the single output signals.
CAUTION
Overloading in a single load cell can no longer be detected from the output
signal.
6.2 Connections using the four‐wire technique
With connections to amplifiers using the four‐wire technique the cores BU
(blue) and GN (green) should be connected together, as should BK (black) and
GR (grey). Please take in account that this causes deviations to the sensitivity
and the temperature coefficient of sensitivity that this causes.
6.3

Cable extensions

Cable extensions must be screened and of low capacitance. We recommend
the use of HBM cables which satisfy these requirements. With cable exten­
sions it should be ensured that a proper connection is provided with low con­
tact resistances and good insulation.
When using the six‐wire technique, the effects of resistance changes in the
extension cable are compensated. If you extend the cable with the four-wire
technique, the sensitivity deviation can be rectified by adjustment. Temperature
effects though are only compensated with the operation using the six-wire
technique.
The load cell connecting cable should be routed so that any condensed water
or dampness forming on the cable can drip off. lt must not be led to the load
cell. In addition, it must be ensured that no dampness can penetrate the open
end of the cable.
C16M...
A01268_04_XS0_00 HBM: public
Connection
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