11
Sensors
SMSB121TH integrates a sensor able to keep under
control the temperature and humidity of the room
in which it is installed. Thanks to the "thermo-
stat" and "hygrostat" functions, it is possible to
program the threshold at which the relay is acti-
vated automatically. In addition, up to 4 temper-
ature alarm thresholds can be configured.
Note: The thermostat and hygrostat functions cannot
be activated simultaneously.
The sensor measurement is to be considered "indic-
ative" as the internal temperature of the product
can be influenced by the following factors:
•
Relay load
•
Use of SMS or DATA
•
Signal level
•
Installation
Sensor can be calibrated using the sensor section.
Before calibrating, we recommend that you keep the
device in a safe place for at least one hour after
installation.
Digital inputs
Digital inputs allow the user to send specific events
of the system to which the appliance is connected,
such as, for example, a boiler block or power fail-
ure, as well as opening a valve, etc.
SMSB121TH has two alarm inputs, each of which allows
you to send users an SMS both when opening and clos-
ing the contact. The text of each event can be cus-
tomized; it is also possible to delay the event in
order to avoid false alarms.
Contact type
You can set the type of contact you use in the in-
stallation:
•
Dry contact: to generate an alarm, connect to a
potential-free contact (e.g. a switch) and short-
circuit it to ground (GND).
•
Wet contact: to generate an alarm, connect a volt-
age from 3 to 24V to the desired input.
Alarm Event
You can set whether the alarm event is generated when
the contact is closed (to ground) or opened.
If the contact is "clean", or high or low level if
"live".
Analog input
SMSB121TH has an analog alarm input configurable
with probes of type 0-10V; 0-20mA; 4-20mA, PT100
and PT1000. Up to four distinct thresholds can be
configured.
Note: Refer to the installation diagram to set the
configuration switches correctly for the chosen
probe.
Probe type
Select the type of probe you want to use.
Measure unit
Unit of measurement of the connected probe.
Probe maximum value
This is the maximum value that the probe can reach.
Probe minimum value
This is the minimum value that the probe can reach.
Threshold alarms
Up to four separate alarms can be configured.
