Facility Explorer FX15 - Analog Inputs Configuration

FX15 Controller Technical Bulletin
30
Analog Inputs
You can configure the six high-resolution analog inputs to accept a wide
range of voltage, current, and resistive input signals.
See I/O Technical Details for the complete FX15 controller I/O table.
A dedicated jumper is available for each analog input.
• Install this jumper in its closed position if the connected sensor
provides a current signal (0-20/4-20 mA).
• Install this jumper 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
AI4 AI5
AI6
FX16-025_10 2003
AGND AGND AGND AGND AGND AGND
AI1
AI2
AI3
AI4
AI5 AI
6
EXT V
EXT V
Figure 31: Analog Input Jumpers
The active sensor (voltage or current) inputs have programmable range
parameters within the application software. These parameters,
HighRange and LowRange, define the equivalent values for reading at
High (10 V and 20 mA) and Low (0 V, 4 mA, and 0 mA) signal input.
Voltage and current inputs from differential pressure transducers can be
linearized by a square root function (SQRT), which operates over the
complete range of the input.
The passive sensors (resistance) have preprogrammed linearization
curves within the application software. For these sensors, the
measurement range is fixed. You can set the reliability range via
software.
The read signal is converted by the FX15 controller according to the
related Analog Input object setup. Available setups are:
• Linear 0-10 V
• SQRT 0-10 V
• Linear 0-10 V, 20% suppression (2-10 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