Hardware Guide AG-811
3.6.
Antenna
The device has two female SMA connector for LTE/GSM antenna and for GPS antenna. For
proper working it is necessary to connect LTE + GSM band antenna and proper GPS antenna.
Antenna line is 50Ω type. Do not switch on device without antenna connected. For better
connectivity in remote area it is necessary to use high gain antenna and place it outside of
electrical panel box.
3.7.
Digital inputs
The device has 2 opto-isolated up to 2500Vrms digital inputs with common minus signal. The
signal maximum voltage is 30V DC. Inputs support only DC signal with proper polarisation.
The input digital high is from 3.5V to V
max
, and digital low from 0 to 2V. Inputs can be
controlled also by open collector circuit with common positive. The input resistance is approx
2.7k. The input terminal diagram is as per below.
1+/2+ = digital input positive
1-/2- = digital input negative
If by mistake reverse polarity signal is connected to input the input will not work, but will not
be damaged.
3.8.
NO/NC outputs
The device has 3 outputs to drive load or external power relays or contractors. For every
output 3 terminals are available: normal open, normal connected and common. The
maximum load capacity is up to 3A and 230V for each output.
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ARAD/AG-811/HG/2022/02 – preliminary
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