Two-Port PCIe RS-232 Serial Expansion Card
Add two DB9 RS-232 serial ports to a full-size or small-form-factor desktop using a PCIe x1 card with 16C1050 UART support, COM retention and speeds up to 921.6Kbps per port.
Key features
Two independent RS-232 ports
Connect compatible barcode scanners, receipt printers, scales, PLCs, medical equipment, POS systems and other serial devices.
Up to 921.6Kbps per port
A 16C1050 UART and 256-byte FIFO support high-performance bidirectional serial communication on both DB9 ports.
Fits full-size and SFF desktops
The standard-profile card includes two low-profile brackets for installation in compatible small-form-factor systems.
COM retention and activity LEDs
Retain assigned COM-port values across compatible reconnects and monitor activity using two green status indicators.
What to know
Continue using established serial equipment
Add RS-232 connectivity for logistics, manufacturing, automation, laboratory, security, AV and point-of-sale systems without replacing compatible legacy peripherals.
Flexible PCIe installation
The PCIe 2.0 x1 card installs in an available x1 or larger slot and supports compatible Windows, Windows Server and Linux systems.
Australian version with official StarTech.com warranty
2-Year manufacturer warranty
This is the Australian version supplied by DeviceDeal and is covered by a two-year official StarTech.com manufacturer warranty in Australia. Keep your DeviceDeal invoice as proof of purchase. Warranty coverage and claims are subject to StarTech.com warranty terms and product assessment.
StarTech 21050-PC-SERIAL-CARD FAQ
How many serial ports does the 21050-PC-SERIAL-CARD add?
It adds two external DB9 male RS-232 serial ports to a compatible desktop computer.
What PCIe slot is required?
It uses a PCI Express 2.0 x1 interface and can install in a compatible x1 or larger PCIe slot.
What is the maximum baud rate?
Each port supports a maximum listed baud rate of 921.6Kbps, subject to system and peripheral configuration.
Does it fit a small-form-factor computer?
Yes. Two low-profile brackets are included for compatible SFF systems, while the card also supports standard-profile installation.
Which operating systems are supported?
StarTech lists Windows 7 through Windows 11, Windows Server 2016/2019 and Linux LTS kernel 2.6.13 or later.
Does it retain COM-port assignments?
Yes. COM retention is listed to help maintain assigned port values in compatible Windows environments.
What equipment can connect to the card?
Typical compatible devices include barcode scanners, receipt printers, scales, PLCs, POS equipment, medical instruments and other RS-232 peripherals.
What warranty covers the 21050-PC-SERIAL-CARD?
This Australian-version product is covered by a two-year official StarTech.com manufacturer warranty in Australia. Keep the DeviceDeal invoice as proof of purchase; claims remain subject to StarTech.com terms and assessment.
