Figure 5. Som Current Sense Header J301 (5); Table 6 - Power Header J301 Pinout - Lantronix Open-Q 845 mSOM User Manual

The table below summarizes the pin outs of header J301
Pin No Signal
1 SOM_PWR_SENSE_P
2 SOM_PWR_SENSE_N
3 GND
To obtain power consumption measurements, the header is connected to a data acquisition unit
(Keithley 2701 or similar) and the voltages on the SOM_PWR_SENSE_P/N pins are captured a few times
a second over the test period (typically 30 minutes). The SOM power consumption is then calculated as
(where Rsense = 5 milliohms):
���������������� = ����������������
Use averaging to reduce noise.
Open-Q 845 µSOM Development Kit User Guide

Figure 5. SOM Current Sense Header J301 (5)

Table 6 - Power Header J301 Pinout

Description
SOM power positive current sense line
SOM power negative current sense line
System Ground
(����������������
∗
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�������������������� ����
3: Open-Q 845 µSOM Development Kit
− ����������������
������������ ������������
�������������������� ���� ������������������������ �������������������� ����
)
21