Figure 6. Vph Current Sense Header J901 (39); Table 6. Power Header J301 Pinout - Lantronix Intrinsyc Open-Q 865XR SOM 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):
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Use averaging to reduce noise.
The table below summarizes the pin outs of header J901
Open-Q 865XR SOM Development Kit User Guide

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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1 

Figure 6. VPH Current Sense Header J901 (39)

3: Open-Q 865XR SOM Development Kit
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22