Facility Explorer FX16 - Analog Inputs

FX16 Master Controller Technical Bulletin 47
Analog Inputs
You can configure the six FX16 analog inputs to accept a wide range of
voltage, current, and resistive input signals (in the related analog input
object setup configuration using FX Builder).
See I/O Technical Details for the complete FX16 I/O table.
There is a jumper on the FX16 circuit board for each analog input. This
jumper should be installed in its closed position if the connected sensor
provides a current signal (0-20/4-20 mA). This jumper should be
installed in its open position if the connected sensor provides a resistive,
ratiometric, or voltage (0-2/0-10 V) input signal.
a
AI1 AI2
AI3
A
I4
A
I5
A
I6
FX16-025_10 2003
AGND AGND AGND AGND AGND AGND
AI1
AI2 AI3 AI4 AI5 AI6
EXT V EXT V
Figure 42: Analog Input Jumpers
Using FX Builder, you can set the ranges of active sensor (voltage or
current) inputs in the configuration parameters. These parameters,
HighRange and LowRange, define the equivalent values for reading at
high (10 V, 20 mA, 4.5 V) and low (0 V, 4 mA, 0 mA, 0.5 V) signal
input. A square root function (SQRT) can linearize voltage and current
inputs from differential pressure transducers, which operate over the
complete range of the input.
The passive sensors (resistance) have a preconfigured linearization
characteristic within the application software. For these sensors, the
measurement range is fixed, but you can set the reliability range.
The setup possibilities are:
• linear 0-10 V
• SQRT 0-10 V
• linear 0-10 V, 20% suppression (0-2 V)
• linear 0-2 V
• SQRT 0-2 V
• linear 0-2 V, 20% suppression (0.4-2 V)
• linear 0-20 mA
• SQRT 0-20 mA
• linear 0-20 mA, 20% suppression (0.4-2 mA)