Teracom TCG120-4, User Manual

Page: 14 / 46

TCG120-4_R1.3 – May 2022 Page 14
7.2.3.2. Digital inputs
For every digital input, a description, up to 15 symbols and states up to 15 symbols can be set.
These descriptions will appear in the monitoring page, conditions page, XML/JSON data, SMS,
and e-mail alerts.
7.2.3.3. Analog inputs
For every analog input, a description, up to 15 symbols can be set. These descriptions will
appear in the monitoring page, conditions page, XML/JSON data, SMS, and e-mail alerts.
For every analog input, fields “Unit”, “Multiplier” and “Offset” are available to convert the raw
voltage/current into meaningful engineering units. The scaled value is calculated by:
SV[Un] = RV * MU + OF
Where:
SV
– scaled (displayed) value;
Un – unit;
RV – raw voltage from the source;
MU – multiplier;
OF – offset.
Example:
For humidity sensor HIH-4000-003 following data (from the datasheet) is available:
VOUT = 0.826 at 0% RH
VOUT = 3.198 at 75.3% RH
The raw values are voltages on the sensor’s output. Actually, we need to know relative
humidity (scaled value) not voltages. The two relations are enough to calculate multiplier