DISPLAY MODULE AND OFFICE CONFIGURATION EDITOR
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3-94
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
3.5.2.5 Analog Inputs
The analog inputs can be used to monitor the voltage on standard 12 VDC and 24 VDC
batteries. They may also be used to monitor any DC voltage from 0 VDC to 36 VDC. There are
six battery monitor channels which are used as follows:
•
General-purpose one on the front of the SEAR (BATT MON (J3)).
•
Monitoring the GCP CPU and I/O module power (VBN).
•
Monitoring each SSCC IIIi module power (SSCC1 and SSCC2).
•
Monitoring the internal system temperature (Int. Temp).
•
Monitoring the external system temperature (TEMP (J3)).
Note the J3 indicates the connector number on the front of the SEAR IIi for the external ones.
Table 3-3 Battery Input Settings
Setting
Description
Name
Up to 20 characters long and used to describe the input but not used
in event reports.
Tag
Up to 10 characters long and used to identify the input in event
reports and local menus.
Sample Period
The number of milliseconds between the processing of the input.
Events for the input can be logged on this interval only. Internally, the
SEAR IIi samples the inputs every 10 milliseconds regardless of this
setting.
Resolution
Specifies the change in volts (or degrees Fahrenheit) required before
an event will be logged into the SEAR IIi event buffer.
Samples to Average
Specifies the number of consecutive 10-millisecond samples to
average together to determine the voltage present on the input. This
value can be set to no averaging, 2 samples, 4 samples, 8 samples,
16 samples, or 32 samples.
Note that the SEAR IIi samples the input every 10 milliseconds, regardless of the ‘Sample
Period’ setting. The ‘Sample Period’ setting determines how often the SEAR IIi will average the
samples to determine if an event is logged. The number of 10-millisecond samples that are
averaged is determined by the ‘Samples to Average’ setting.
If this calculated average results in a quantity that differs by more than the amount defined in
‘Resolution’ from the previously logged value, then a new event is logged.
For example, the battery inputs can be configured:
Resolution = 0.5 V
Sample Period = 100 ms
Samples to Average = 32 samples
In this case, every 100 milliseconds the SEAR IIi averages the last 32 samples of 10
milliseconds each (a period of 320 milliseconds) and compares it to the last logged value of