Corresponding to the Samtec 0.635 mm AcceleRate HD connectors (ADF6–60–03.5–L–4–2–A) on the SOM, the mating connectors (ADM6–60–01.5–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. The keep out area defined maximum component height is 1.0 mm.
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 428 micro-strain reached in 3.63 seconds duration and was validated through dye and pry, where the sample passed.