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 PCIe x1 card with two silver DB9 ports and a metal bracket

SMUGDESK

SMUGDESK IO-PCE382-2S PCIe x1 2-Port DB9 RS232 Data Adapter

SKU CH-KV79-HDKQK

Adds two DB9 RS232 serial ports via a PCIe x1 slot for industrial PLCs, sensors and data acquisition equipment

  • Adds two DB9 RS232 ports for PLC and sensor links
  • PCIe x1 card fits x1, x4, x8 or x16 motherboard slots
  • Professional control chip keeps serial data stable in industrial use
  • Works with Windows and Linux through simple plug-and-play setup
  • Economical way to give industrial PCs missing COM interfaces serial connectivity

Two independent DB9 RS232 COM ports

This PCIe expansion card adds two standard DB9 RS232 serial ports to a system. It connects PLCs, sensors and data acquisition equipment that still rely on legacy serial links. The board targets industrial control hosts and data collection terminals needing extra COM interfaces. Windows and Linux support enables straightforward plug-and-play setup.

Standard PCIe x1 fits x1 through x16 slots

The card uses a single-lane PCIe x1 interface compatible with x1, x4, x8 and x16 motherboard slots. A professional control chip maintains stable serial communication in industrial environments. Throughput is limited by the RS232 standard and the single PCIe lane. High-speed or multi-gigabit serial protocols are not supported by this adapter.

Low-profile bracket frees full-height slots

The compact form factor suits space-constrained industrial PCs and embedded chassis. No external power connector is required, simplifying cable routing inside tight enclosures. Installation only needs an available PCIe slot and operating system driver support. Builds requiring more than two serial ports or isolated interfaces will need additional cards.

Highlights

  • Adds two DB9 RS232 ports for PLC and sensor links
  • PCIe x1 card fits x1, x4, x8 or x16 motherboard slots
  • Professional control chip keeps serial data stable in industrial use
  • Works with Windows and Linux through simple plug-and-play setup
  • Economical way to give industrial PCs missing COM interfaces serial connectivity

Specifications

No published specifications for this item yet.

Questions about this item

Will the PCIe x1 slot on my older motherboard accept this RS232 expansion card?

The card follows the standard PCIe x1 specification and fits x1, x4, x8 and x16 slots on mainstream motherboards.

How can I verify both DB9 COM ports are communicating correctly after installation?

Open Device Manager on Windows or check dmesg on Linux to confirm two new serial ports appear, then run a loop-back test on each DB9 connector.

Does the package include cables or brackets for the two DB9 ports?

The card supplies the two DB9 ports directly on its bracket; no additional cables or brackets are included.

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

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.