ElectroDacus DSSR20, Руководство пользователя

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SBMS0
SBMS0
www.ElectroDacus.com
www.ElectroDacus.com
11.5 Automation (EXT IO & ADC)
11.5 Automation (EXT IO & ADC)
In this menu you can see the 16pin connector pinout and you can set the 4 EXT IO pins as one of the 5 types including the possibility to change
state when battery SOC is above or below a user defined SOC. Type 6 available on SBMS0 for dual PV array.
In the ADC settings you can set ON/OFF and external load see
page 13 for more details and you can also manually calibrate the internal current
readings by fine adjusting the internal current shunt value. The default should be close enough in most cases.
The current sense amplifiers used for PV and ExtLoad can have a positive or negative offset. In case the offset is positive the auto-calibration done
when SBMS powers ON can be done correctly. Since ADC inputs (with the exception of battery ADC) are single ended and can only see a positive
voltage as reference to ground it will not be able to see a current sense amplifier negative offset (offset has to do with manufacturing tolerances)
and a manual correction may be necessary. The offset is usually very small and will translate in just a few mA worst case 300mA.
You will notice that at a small current there will be no reading and after current is above the offset level the reading will exist but it will have the
subtracted offset value. If you add that offset in here the reading will be more accurate since it will include that negative offset.
Type 5 works correctly just since version 4.1p