Spectra Logic Bus Interface Unit Card 5900017 Storage Library Controller PCB

Spectra Logic Bus Interface Unit Card 5900017 Storage Library Controller PCB

This is a Spectra Logic Bus Interface Unit Card bearing part number 5900017. It is a multi-layer PCB module designed to handle bus interfacing functions within Spectra Logic tape library and storage automation systems. The card is densely populated with ICs, edge connectors, and two ribbon cable headers, consistent with a controller or interface card that manages data and control signal routing between subsystems within a library chassis.

Specifications & What's Included

• Part Number: 5900017
• Manufacturer: Spectra Logic (board also carries a YTI manufacturer mark)
• Country of Manufacture: Made in U.S.A. (printed on PCB)
• Type: Bus Interface Unit Card / Controller PCB
• Form Factor: Expansion card / plug-in board module
• Edge Connector: Dual card-edge connectors along the bottom — standard library backplane interface
• On-board connectors: Two ribbon cable headers (visible in photos) for internal drive/mechanism connections
• Additional connectors: Multiple header and IDC connectors along card edges
• PCB condition: Intact; no visible burnt components, broken traces, or physical damage
• Includes: Card only — no cables or additional accessories

Applications

Spectra Logic is a Colorado-based data storage company that has produced tape library and automated storage systems since the 1980s. Bus interface cards like this one serve as the internal communication backbone of a tape library, routing control signals and data between the library's mechanical assemblies, drive bays, and host interface controllers. In a modular tape library architecture, individual function cards plug into a common backplane, and the bus interface card coordinates that internal bus — managing handshaking, addressing, and signal conditioning between subsystems. This type of replacement card is sought by system administrators and field service engineers maintaining legacy Spectra Logic libraries where the original equipment is still in service managing long-term tape archives and backup infrastructure. Spectra Logic libraries have been deployed in data centers, broadcast media storage, government archives, and research institutions.