IEC 60297-3-107:2012 defines the interface dimensions between subracks and associated plug-in units using connectors as defined in PICMG-MTCA.0 (Fixed board, see Figure 7) and IEC 61076-4-116 (Two part, see Figure 12) and other two part connectors, (see Figure 15). For mechanical and climatic tests refer to IEC 61587-1. For electromagnetic shielding performance tests refer to IEC 61587-3.