Vega SI-11 / User Manual
10
Revision 25 - 24 June 2021
CONTACTS DESCRIPTION
When connecting a radio modem to external devices, consider the internal circuitry of
its pulse inputs shown below.
De-bouncing logics with 5 msec time constant is integrated in the pulse counter. The
pulse counting is carried out for frequencies up to 200 Hz.
The pulse counter has 4 pairs of contacts that is allows to connect circuits with the
following types of NO contacts:
reed switch;
mechanical pushbutton;
open-collector output.
Equipment with NAMUR pulse output is not supported
Polarity effects only "open collector" circuits.
To reset all readings from the pulse inputs accumulated in the device memory you need
to switch the device to the "Storage" mode by holding the start button pressed (min. 5 seconds).
Pulse inputs can be configured for work in the "Security" mode via the “Vega LoRaWAN
Configurator” application. In this mode, the device does not count pulses at the "Security" input,
but only monitors its status. Should the "Security" input trigger, the device is activated and sends
an alarm message to the network.
