Both the commercial (C) grade and industrial (I) grade SOMs have two Samtec 0.635 mm AcceleRate® HD high-density, 4-row, 60-position connectors. The Samtec part number is ADF6–60–03.5–L–4–2–A. The connectors are placed on the bottom side of the carrier card centered between the mounting holes shown in Figure 1.
Board-to-board (B2B) mating connectors must be precisely placed on the PCB, particularly for multi-pair connector applications. Tight control is required during the board layout design and the manufacturing process for product reliability and a decent yield rate. To avoid over-stressing the mechanical design of the connectors and creating functional damage during system assembly, the next figure includes the recommended maximum position tolerance of the connector. Auto-placement machine accuracy and the tolerance of the connector pin solder pad position contributes to this recommendation.