HP Power Serial Card MTG2 REV.D / two extra RS-232 serial ports

HP Powered Serial Card (2-port) — a PCI/adapter board that adds two RS-232 serial ports to an HP system.

• This card fits into a PCI slot inside an HP system and provides two physical serial (COM) ports with DB-9 connectors.
• The “Powered” designation means the ports can supply power (5 V or 12 V) on the serial pinouts to drive devices like barcode scanners, receipt printers, or other peripherals without a separate power source.

In HP spares terminology:

• SP# (Spare Part) — 638947-001 — identifies the spare you can order.
• DG# (Drawing number) — 634337-000 — internal drawing/assembly reference.
• AS# (Assembly number) — 632852-001 — internal assembly BOM reference.

All refer to the same Powered Serial Card assembly used in some HP point-of-sale (POS) and small business desktop systems.

?? Typical Use Cases

These cards are commonly installed in HP retail/point-of-sale systems (e.g., HP RP5 / RP5800 / RP5810 series), industrial PCs, or desktops that needed extra serial ports for peripherals that expect power over the serial connector.

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