LSIS XBF-AH04A

Chapter 13 Analog Input Module (XBF-AD04C)
(8) Relationship between voltage input accuracy and wiring length
In voltage input, the wiring (cable) length between transmitter or sensor and module has an effect
on digital-converted values of the module as specified below;
Where,
Rc: Resistance value due to line resistance of cable
Rs: Internal resistance value of transmitter or sensor
Ri: Internal resistance value (1㏁) of voltage input module
Vin: Voltage allowed to analog input module
% Vi: Tolerance of converted value (%) due to source and cable length in voltage input
( )
[ ]
RiRcRs
VsRi
Vin
+×+
×
=
2
%1001% ×






−=
Vs
Vin
Vi
(1) While using a input voltage range among 1~5V, 0~5V, 0~10V, -10~10V
If the external wiring is disconnected, It will take a certain amount of time to display output data
value of 0V.If you want to reduce that time, connect the resistance about 0.1㏁~1㏁ between input
channel V+ and COM.
Vs
Rs
Rc
Rc
Ri
Load
The analog input(voltage)
Vin
Remark
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