We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green PCB expansion card with two DB9 ports and silver bracket

SMUGDESK

SMUGDESK PCIe to 2-Port RS232 Serial Expansion Card MCS9922 Chip

SKU CH-HZC9-P1SC8

Adds two DB9 RS232 serial ports through a single PCIe slot using an MCS9922 chip for stable 921.6Kbps communication with Windows 10 and Linux systems

  • Adds two DB9 RS232 COM ports via one PCIe slot
  • MCS9922 control chip keeps data steady during long sessions
  • Each port runs up to 921.6Kbps baud with built-in buffer
  • Standard PCIe bracket fits x1, x4, x8 or x16 slots
  • Drivers ready for Windows 10 and other Windows & Linux systems

Dual RS232 via PCIe

This SMUGDESK expansion card adds two independent DB9 serial ports to a desktop through a single PCIe slot. It targets technicians maintaining POS terminals, PLCs, barcode scanners or monitoring controllers that still rely on legacy COM connectivity. The board fits standard brackets and works in any x1, x4, x8 or x16 lane. Drivers cover Windows 10 and common Linux distributions.

Thermals and power

The MCS9922 controller runs without active cooling and draws minimal power from the slot itself. No external connectors or auxiliary cables are required, so the card adds negligible heat or acoustic load inside the chassis. Stable transmission is maintained during extended sessions thanks to the chip’s integrated buffering.

Driver and bracket impact

Bundled drivers enable immediate port recognition on supported operating systems without manual INF editing. The low-profile bracket is pre-fitted for standard cases; a half-height bracket is not included, so slim enclosures may need a separate adapter. No management software or configuration utilities ship with the card.

How it compares

Measured against everything we stock in Interface & Card Adapters, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 65% of the 354 comparable items (median $21.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the SMUGDESK PCIe serial card in a standard desktop, and which bracket size should I use?

Insert the card into any free PCIe x1, x4, x8 or x16 slot; the supplied standard PCIe bracket matches regular desktop chassis, so no low-profile bracket is required.

Will the MCS9922 chip or the DB9 ports need periodic replacement or firmware updates?

The MCS9922 controller and DB9 connectors are solid-state with no moving parts or user-serviceable firmware, so no scheduled maintenance or component replacement is expected.

At what sustained throughput does the RS232 link hit its ceiling on this card?

Each port tops out at the standard RS232 maximum of 921.6 Kbps; the on-chip buffer prevents overruns but cannot exceed that baud-rate ceiling.

More in Interface & Card Adapters

Similar items