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- Check for continuity between 12 V, ISO12 V, GND, ISO GND, and 5 V (all of these should be isolated from each other).
- The board can now be powered by connecting a power supply set to 12 V between 12 V and GND. A current limit of 20 mA should be sufficient.
- Measure the voltage between the isolated 12 V and ISO GND, and 5 V and ISO GND.
- Turn off the power supply.
Current Sense Output (INA240)
- Supply 12 V between 12 V and GND.
- Connect a wire to the connector near the center of the board labelled VREF.
- Measure the voltage between the wire and ISO GND. The value should be about 2.5 V.
- Connect a wire to the connector near the center of the board labelled IN+.
- Without the shunt resistor connected, connect a power supply between the positive and negative terminals. Apply a range of voltages across the positive and negative terminals between -20 mV to 20 mV. Measure the voltage between VREF and IN+. The voltage should be 1 V for each 10 mV across the positive and negative terminals (i.e. -2 V with -20 mV, 0 V with 0 V, and 2 V with 20 mV).
- Turn the power supply off.
isoSPI (LTC6820)
- Connect the current sense board to a validated BMS carrier board with a controller board.
- Power the BMS carrier board with 12 V.
- Set the CS pin of the BMS carrier board low, set the MISO pin of current sense low, pulse the BMS carrier clock, set the MISO pin of current sense high, pulse the BMS carrier clock, and then set the CS pin high. The BMS carrier should receive the MISO signals.
- Turn the power supply off.
ADC (ADS1259)
- Connect the current sense board to a validated BMS carrier board using the isoSPI connections.
- Power the BMS carrier board with 12 V.
- Send the opcodes to read from the CONFIG0 registers (0010 0000, 0000 0001).
- If 1 0 ID1 ID0 0 1 0 1 is returned, then the ADC is operating correctly, where ID1, and ID0 are factory programmed identification bits.
- Turn the power supply off.