Corresponding to the Samtec 0.635 mm AcceleRate HD connectors (ADF6–10–03.5–L–4–2–A) on the SOM, the mating connectors (ADM6–60–01.5–L–4–2–A and ADM6–10–01.5–L–4–2–A) are placed on your carrier card. See the note about the Samtec REF-226081 alternative mating connector. The two SOM mating connectors must be placed and positioned using a tightly controlled design and manufacture processing. The following figure shows the keep-out area and connector position tolerance information used on an example carrier card design.
During board-to-board insertion and removal, the installation process should work within the following recommended strain limits. The following figure shows the recommended locations (E–W, N–S) for a strain measurement on a carrier card. Diagonal strain should not exceed 500 micro-strain during mating. Strain rate duration taken to reach maximum 500 micro-strain should not be less than four seconds. Based on experimental data, the maximum strain of 222 micro-strain reached in 4.42 seconds duration and was validated through dye and pry, where the sample passed.