LSIS XBF-AH04A

XGB Analog edition manual
(8) Relation between voltage input precision and cable length
In voltage input system, the cable length between the module and transmitter or sensor
influences on the converted digital value of the module. The value is as follows.
Where,
Rc: line resistance of the wire,
Rs: internal resistance of the transmitter or sensor,
Ri: internal resistance of voltage input module (1 ㏁)
Vin: voltage applied to the analog input
% Vi: error in the converted value caused by source and cable length in voltage
input(%)
( )
[ ]
RiRcRs
VsRi
Vin
+×+
×
=
2
%1001% ×






−=
Vs
Vin
Vi
Vs
Rs
Rc
Rc
Ri
Load
Analog input (Voltage)
Vin
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