Document name: Link IO - Manual
Document date: 1.2 10/02/2020
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Thermostat
Any Universal Channel configured as Analog Input (that being a passive Temperature sensor or an active
input such as 4-20mA or 0-10V) can be used as input of a thermostat function that creates an ON/OFF signal
that can be then sent to a digital output.
The thermostat can have an enable signal and can be used direct or reverse.
2 Thermostat functions are available on each main device and each expansion.
On the first row it is possible to select the Universal Channel used as input for the thermostat.
Note: the Universal Channel MUST be configured as Analog Input
On the second row it is possible to select a Universal Channel used as enable signal. On the main unit it is
possible to select also one of the 2 dedicated digital inputs. It is also possible to select whether the enable
signal is direct (contact open = enable) or reverse (contact close = enable). Leaving the “En input” to “—” will
keep the function always enabled.
Note: if selecting a Universal Channel, it MUST be configured as Digital Input
Note2: you can use the same enable function on 2 separate thermostat one “direct” and one “reverse” to
create a “summer/winter” signal, for example.
On the third and fourth row we can configure the set point and hysteresis of the thermostat, and on the fifth
row whether we want the thermostat to work “direct”
(cooling)
or “reverse”
(heating).
In a
DIRECT
control operation, the output will be triggered ON when the analog input value is equal or above
set-point + hysteresis. It would be then maintained ON until the analog input value goes below set-point.
