Source notes
PartSurfer BOM (saved cache) 7NW53US / Unknown Keyword; HP description: "SPS-RS232 BD 15"; US product numbers: 7NW53US, 7NW58US, 7NW70US, 7NW75US, 7NW83US, 7PC16US, 7UP82US, 7YV28US. Saved PartSurfer BOM checked offline 2026-10-29, no HP fetch (via FOB-CX-001).