Airlink101 LX60 Hardware User's Manual page 28

AirLink LX60 Series Hardware User Guide
Solar panel or battery
Figure 2-14: Analog Input
Table 2-7: Analog Input
Pull-up
Off
Data sampling is handled by a dedicated microprocessor. In order to filter noisy signals,
twenty measurements are taken over a 250 ms interval. The measurements are averaged
to generate a sample. If the change since the last sample is significant, a notification is
sent to the CPU for updating the current value displayed in the user interface and for use
by Events Reporting.
Changes are considered significant if the change is 200 mV or more (when the range of
monitored voltage is 0–5 V) or 350 mV or more (when the range of monitored voltage is
0–10 V). If there has not been a significant change to the parameter being monitored, the
CPU reads a sample every 2.5 minutes, which detects small changes.
When a reading is received,
Updates UI
Events Reporting
CPU
Figure 2-15: Analog Input Sampling and Reading
Note: The same method is used to sample the input voltage and the internal board temperature for
Events Reporting. The significant changes are 300 mV for the input voltage and 1 ºC for the board
temperature.
Rev. 2 June 2021
Pin 4 (power connector), or
Pin 6 or 7 (I/O connector)
Analog Input Range
Analog Input Accuracy
Reading from the CPU
when change is significant
or 2.5 minutes has passed
with no change
LX60
V
in
Protection
Circuitry
Output Off (default)*
* Configurable on the ACEmanager I/O tab
Minimum Typical
0.5 V —
-1.5% 0.50%
Sample every 250 ms,
based on 20 measurements
Microprocessor
28
Internal pull-up
resistor
Off (default)*
Z
in
Maximum
5 V, 10 V
(configurable)
1.5%
Analog input
Pin 4 on the power connector or
Pin 6 or 7 on the auxiliary I/O connector
41111782