7. Gently press the SoM down until the two clips snap into place. Ensure that you do
not force the SoM into place.
8. After the SoM is seated, re-position the spacers using tweezers. The spacers must
be placed between the boards and aligned with the screw holes.
9. Using a PH1 Phillips head screwdriver, re-insert the two screws that secure the
SoM to the PCB. Be sure not to over-torque the screws.
10. Verify the position of the spaces to ensure they are properly aligned with the pads;
improper alignment can damage the PCB or SoM traces.
2.5 Replacing Labels
Two new labels, a serial number label and a firmware revision label, are packaged
with the programmed SoM to be used when it is permanently attached to the UMCB
board assembly. The serial number for the SoM will be read from the Meter Info page
in the web browser.
2.5.1 Serial Number Label
The serial number is on the first line and the software version and check sum are on
the second line. For example,
Figure 5: Firmware Revision and CRC Label
This label should be placed over the old label located on the fiber-optic converter.
2.5.2 Firmware Version Label
The firmware version label with a QR code should be placed over the old QR code
label located on the UMCB shield.
Figure 6: Firmware Version Label
Bulletin MN0A005 Issue/Rev. 0.0 (4/22)
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SoM Replacement Manual
