The general functionality and logic of the Chexit circuit board and DE5300/RCM circuit board is the same.
However, the DE5300/RCM circuit board is mounted on its plastic bracket in a different orientation for wall enclosure mounting.
Here are the standard part numbers for each as of July 2023:
DE5300/RCM PCB Kit - 15 Second release 090943
Chexit PCB Kit - 15 second release 040086
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