HBK C16M, Инструкция по монтажу

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9
C16M
CONNECTION
6 CONNECTION
Strain‐gauge based Ioad cells can be connected to:
S
carrier frequency or
S
DC‐measuring amplifiers.
The transducer connection is implemented using the six‐wire technique. The connection
assignment can be taken from the following illustration.
wh (white)
bk (black)
gy (grey)
Shield connected with housing
gr (green)
rd (red)
ye (yellow)
Excitation line (-)
Sensor line
Signal line (+)
bu (blue)
Sensor line
Signal line (-)
Excitation line (+)
Fig. 6.1 Wiring code (6‐wire‐technique)
Electrical and magnetic fields often induce interference voltages in the measurement
circuit.
Therefore:
S
Use screened low‐capacitance measurement cables only (HBK cables satisfy this cri­
terion).
S
Do not route the measuring cable parallel to power and control lines. If this is not pos­
sible, protect the measurement cable, e.g. with steel conduit.
S
Avoid the stray fields of transformers, motors and conductors.
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 HBK 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 aver­
age of the single output signals.