Electrical connection
24 A4243-1.0 HBM: public PAD4002A
portant when supplying several PADs from one power
supply. In contrast, the sustained loading is calculated
from the formula shown above.
S Connection to a wide-ranging supply network is not
permitted as this often causes interfering voltage
peaks to be induced. Instead, a local supply must be
provided for the electronics (even when grouped).
S The supply voltage must be insulated from the shield
potential. A connection from GND to the housing is
not required, but the max. potential difference must be
no more than 7 V.
S The supply voltage ground wire (GND) is also used as
the reference potential for the interface signals and
the digital inputs/outputs.
S In layouts with several PADs, the supply can run to
gether with the RS-485 bus lines in a 6-pin cable (with
HBM junction boxes, for example). Ensure that there
is sufficient wire cross-section provided, as some
cable sections will conduct the supply current for all
the connected PADs.
6.4 Effect of the connecting cable on the
thermal characteristic of sensitivity
The resistance of the lines for voltage supply in the cable
between the load cell/force transducer and the PAD has
an effect on the thermal characteristic of sensitivity TK
C
.
The correlation shown in Fig. 6.3 applies.
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