Vega TD-11 / User Manual
9
Revision 04 - 24 January 2019
3 OPERATION
CONTACTS
Temperature sensor has a two contact pairs. One pair (“Therm” and “ ” contacts) is for
connect to external thermistor, another one is security input (“Drv” and “Sens” contacts).
Security input of the device can be used for connect to circuits with the following types
of NO contacts:
- reed switch (Herkon);
- mechanical pushbutton;
- open-drain output.
Polarity is matter only for open-drain circuit. Open drain output must be connected to
“Drv” contact and ground to “Sens”.
Security input can trigger on short, open or both of this cases. It is configured by the
“Vega LoRaWAN Configurator” application (See part 4). Should the security input triggering,
the device is activated and sends an alarm message to the network.
External thermistor
connection
contacts
Contact pair for
connection with
the security circuit