IBM 49Y3325 server / storage / networking hardware Server Hardware / Parts

The IBM 49Y3325 is a Fan Logic Module (Fan MUX card) for the IBM Flex System Enterprise Chassis, cross-referenced against the later part number 94Y5805. The module monitors and controls the fan modules fitted to the chassis, multiplexing their tachometer and control signals back to the chassis management module so cooling can be adjusted to load and a failing fan can be identified and reported individually rather than as a generic chassis fault. Flex System Enterprise Chassis installations of this generation remain in widespread production use, and a genuine, working fan logic module is essential to maintaining correct cooling control and fault reporting across the chassis, since a failed module can mask individual fan failures from chassis management. Tech-Star (UK-based, shipped worldwide) supplies the 49Y3325 for engineers maintaining Flex System chassis cooling infrastructure.