Module Shells With 36-Position Spring Terminal Cutout, C Series Module Shell—The cRIO‑9959 contains 10 module shells and offers OEMs and system integrators a cost-effective solution for developing custom CompactRIO I/O modules. The cRIO‑9959 has shells that include cutouts for a 36-position spring terminal connector, a PCB right‑angle 15‑position D‑SUB connector for connecting the module to the CompactRIO chassis, and a right-angle 36-position spring terminal connector.