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The StarTech.com PEX1S553LP is a single-port PCI Express RS232 serial adapter card featuring a 16550 UART chipset, delivering up to 460.8Kbps data transfer speeds with a 256-byte FIFO buffer. It supports flexible power configurations and comes with both low-profile and full-profile brackets for versatile installation on Windows and Linux systems. Designed for IT professionals, it offers reliable legacy device connectivity backed by lifetime warranty and expert technical support.





























| ASIN | B0041ULUX6 |
| Are Batteries Included | No |
| Best Sellers Rank | 81,782 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 30 in Serial Port Cards |
| Brand | StarTech |
| Colour | Green |
| Customer Reviews | 4.3 4.3 out of 5 stars (105) |
| Date First Available | 16 Nov. 2010 |
| Graphics Card Interface | PCI |
| Guaranteed software updates until | unknown |
| Item Weight | 44 g |
| Item model number | PEX1S553LP |
| Manufacturer | Startech |
| Number of Serial Ports | 1 |
| Operating System | Microsoft |
| Product Dimensions | 8 x 10.5 x 2 cm; 44 g |
| Series | PEX1S553LP |
D**K
Solved getting an RS232 interface on a brand new PC
Small format PCIe card providing a cost effective and maximum performance RS232 interface card. Supplied drivers easily installed from CD, no problems but remember to set correct port number (not explained in instructions)
D**N
Good Service
thanks for your service plug it in worked first time
D**S
Five Stars
great product swiftly delivered
L**N
Five Stars
Works a treat.
O**.
Reconnu par Windows 10 dès l'installation de la carte. A permis de me connecter à un automate Crouzet Millénium 2+ et son logiciel d'un autre âge qui ne voulaient rien savoir avec différents adaptateurs USB-RS232. Je trouve néanmoins que c'est un peu cher.
E**T
Fonctionne très bien sur serveur DELL PowerEdge R750xs sous Windows 2022.
M**C
Needed this for a old printer on a small form factor that didnt come with a serial port. Installed this in a few seconds. Windows 11 found the driver and I was up and going in 10 seconds after install! Great product. Works very good with no issues on a Dell Small form factor PC
J**F
Installed this in a new Windows 11 HP Envy PC to control a HF radio. Works flawlessly!
J**T
I purchased this board for a low-end computer that I set up as a Debian based NTP server for my local network. I used a GPS receiver with one pulse-per-second output as the time source, and it is connected to this serial card. The card installed into a low profile pci slot and was brought into service by linux with no hassles. Set up NTP software to read data from this comm port, and viola! and stratum one NTP server was born. This card has performed flawlessly in 24/7/365 service. Highly recommended.
Trustpilot
2 weeks ago
2 weeks ago