Vega SI-21 / User Manual
Revision 11 – 23 October 2020
5
1 DESCRIPTION AND OPERATION
DEVICE DESCRIPTION
Vega SI-21 pulse counter is designed for counting of pulses incoming to 4 independent
inputs, further accumulating and transmitting of this information in the LoRaWAN network.
In addition, Vega SI-21 can be used as a security device - pulse inputs can be
configured as security inputs.
The pulse counter can check the specified temperature range. When configuring the
device, you can set the low and high thresholds for permissible temperature values. When the
temperature value goes beyond the range, the modem starts an extraordinary
communication session. The data collection period for operation within the temperature
range and outside is configurable separately.
The pulse counter can be used for any utilities’ meters and industrial equipment with
pulse output of herkon type or open-drain type contact.
Equipment with NAMUR pulse output is not supported
Vega SI-21 has ability to connect an external temperature sensor for taking temperature
readings from objects which require such control.
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 counter is powered by a 3400 mAh built-in battery.
The device is powered by a non-rechargeable lithium-thionyl chloride
(LiSOCl
2
) battery
Attempts to charge the battery may result in fire
