4 GB C Series Memory Module—The NI-9802 secure digital (SD) module provides removable, solid-state, nonvolatile data storage expansion for your CompactRIO data-logging applications. Removable SD media make rapid storage expansion possible, and the rugged CompactRIO form factor offers the same extreme industrial certifications and ratings as other CompactRIO products. The NI-9802 also offers open media bay detection for data protection.