DESIGNER’S HANDBOOK 4189350049C EN
Page 56 of 206
Input type can be changed from the XDi menu, the highlighted input type, in the example above, is used for a
4-20mA input, one of the most used analogue interface types for indicators.
Input type
Input parameter
range
AX1 Input to be
used
Marking
Input
resistance
Note
+/- 7.5 V
+/- 7 500 mV
High voltage
input
HVI (1,2
or3)
112 kΩ
Select the range that
best matches your
input voltage
+/- 15 V
+/- 15 000 mV
+/- 30 V
+/- 30 000 mV
+/- 10 mA
+/- 10 000 µA
High current
input
HI (1 or 2)
< 65 Ω
(50 Ω*)
Select the range that
best matches your
input voltage
+/- 20 mA
+/- 20 000 µA
+/- 1 V
+/- 1 000 mV
Low voltage input LIV (1 or 2)
1 kΩ
The low input is used
for both low current
and low voltage.
+/- 2 V
+/- 2 000 mV
+/- 1 mA
+/- 1 000 µA
Low current input
+/- 2 mA
+/- 2 000 µA
*) The resistance used to measure the current excl. the resistance in the poly-fuse.
5.6.3
Analogue scaling
In the VS profile, each analogue input used is pre-configured to scale the incoming analogue signal to the correct
output values that fit the data type it sources data to.
The example below shows the setup menu for a typical scaling of an analogue RPM 0 to 200.0 RPM input
represented by a 4-20 mA input signal. The analogue input is configured in the VS to use 2 point calibration (or
scaling); this requires 2 sets of scaling points:
Input
Value
Note
Input point 1
4 000
in µA equal to 4.000 mA
Output point 1
0
0.0 RPM @ x0.1 res.
Input point 2
20 000
in µA equal to 20.000 mA
Output point 2
3000
300.0 RPM @ x0.1 res.
Input point 1/output point 1 defines that 4000 µA (4 mA) is representing 0.0 RPM, and 20 000 µA (20 mA) is
representing 300.0 RPM. Please note that the standard RPM resolution of x0.1.
