Library Guide SL4000 Specifications and Features Hardware Components Hardware Components The library has several key hardware components. Drives Tape Cartridges (Media) Storage Cells Cartridge Access Ports (CAPs) Robot Operator Panel Base Module Card Cage DC Power Supplies Web Camera Cooling Fans Controller Cards Root Switch (LOER) Library Controller (LOC) Library Controller Storage (LOH) Video Card (LOV) DC Power Converter (LOY) Safety Controller (LON) Network Patch Panel (LOEB) Drive Switch (LOES)