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Old Version 69

changes.mady.by.user John Hartfiel

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New Version 70

changes.mady.by.user Martin Rohrmüller

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1

Are mounting holes placed properly?

Four Mounting holes should always be used. They are required for mounting screws and for module extraction. The mounting holes will also help in dissipating some heat from the module to the carried board PCB. Four holes with a 3.2mm diameter should be placed exactly at the corners of a 34mm by 44mm rectangle.
2Are B2B headers properly placed?B2B headers must be placed and aligned very precisely or the module will not align correctly (in the worst case module insertion could destroy the connectors or the PCB). The B2B headers should be locked on the PCB, and it is recommended that the position and placement be checked against placement dimensions before submitting the PCB files.
3Are B2B headers rotated properly?As B2B header pin numbers differ from module to the carrier (swap of odd and even numbers), it is recommended that that the rotation is checked in the PCB design.
4Height clearance below moduleComponents can be placed below the module but height clearance rules must be obeyed.
5Power dissipation of components below moduleIt is not recommended to place any components with high power dissipation below the module, as there will be almost no airflow below the module.

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