USER MANUAL – RTU-LP-ST
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12.
FIRMWARE UPDATE
In order to include new functions, the system includes a firmware update option.
For updating the firmware use the Easy RTU-LP software and the “UPDATE” cable (supplied).
For updating the firmware the firmware update cable must be used.
CAUTION!
-BEFORE UPDATING firmware, copy the current configuration.
-Once the firmware is updated, the previous setup may be deleted so the RTU must be re-
configured.
13.
ENERGY ANALYSIS
The RTU-LP battery duration depends from the user configuration.
The standard 10,8V lithium battery can supply 12500 mAh at 10,8V.
It’s best in the calculation to use the 80% of the full battery capacity = 10400 mAh.
The RTU Consumption with all inputs OFF and Analog Inputs measured at 30s without powering the
external sensors is:
0.375 mA average at 10.8V.
In these conditions, the RTU will work for about:
10400 mAh/0.375mAh= 27733 hours = 1155 days = more than 3 years
When the RTU send an SMS event the consumption calculation is:
About 90 seconds for sending 1 SMS (with GSM Field = 3/3), in this condition the RTU consumption is:
21mA average at 10.8V
So about 21mA*(90seconds/3600seconds in 1h)=0.525 mAh
So for acquiring and sending 1 SMS for day the total consumption is: