Shell With Cutouts for 37-Position D-SUB Connector, C Series Module Shell—The cRIO‑9955 offers OEMs and system integrators a cost-effective solution for developing custom CompactRIO I/O modules. The cRIO‑9955 includes cutout slots for 37‑pin D‑SUB connectors, a PCB right‑angle 15‑pin D‑SUB connector for connecting the module to the CompactRIO chassis, and a 37‑position D‑SUB connector with screws.