SKU: 91103397239

StarTech.com 4-Port Serial PCIe Card, Quad-Port RS232/RS422/RS485 Card, 16C1050 UART, ESD Protection, Windows/Linux, TAA-Compliant

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Description

StarTech.com 4-Port Serial PCIe Card, Quad-Port RS232/RS422/RS485 Card, 16C1050 UART, ESD Protection, Windows/Linux, TAA-CompliantExpand and modernize serial I O on your desktop or Small Form Factor (SFF) system with the StarTech. com 4 Port Serial PCI Express Card. This versatile card provides four independent DB9 serial ports that can be configured per port for RS 232, RS 422, and 2 or 4 wire RS 485. Built around reliable 16C1050 UART technology, it delivers dependable, low latency communication with legacy peripherals, industrial equipment, data loggers, POS devices, and lab

Expand and modernize serial I/O on your desktop or Small Form Factor (SFF) system with the StarTech.com 4-Port Serial PCI Express Card. This versatile card provides four independent DB9 serial ports that can be configured per port for RS-232, RS-422, and 2- or 4-wire RS-485. Built around reliable 16C1050 UART technology, it delivers dependable, low-latency communication with legacy peripherals, industrial equipment, data loggers, POS devices, and lab instruments. With ESD protection and broad operating system support, this PCIe card is designed to deliver secure, durable performance in demanding environments while remaining easy to install and configure.

  • Independent port configuration for flexible communication. Each of the four DB9 ports can be set per-port to RS-232, RS-422, or 2-wire/4-wire RS-485, enabling you to connect mixed serial devices from a single card without adapters or multiple PCIe slots.
  • High-performance UART architecture. The card uses the proven 16C1050 UART family to support reliable, multi-device serial communication with low latency and solid data integrity across all four channels.
  • PCI Express x1 interface for broad compatibility. Designed for desktops and small form factor systems, this PCIe card installs into a standard PCIe slot without occupying excessive space, making it ideal for upgrading older workstations or expanding I/O on compact builds.
  • Comprehensive OS support and driver availability. It delivers driver support for Windows and Linux, ensuring quick setup and dependable operation in a wide range of environments, from office IT to industrial deployments.
  • Robust protection and compliance. Built with ESD protection to safeguard sensitive components and a TAA-compliant design for government, education, and enterprise purchases.

Technical Details of StarTech.com 4-Port Serial PCIe Card

  • Ports: 4 DB9 serial ports, independently configurable per port.
  • Interface: PCI Express (PCIe) card with PCIe x1 lane, suitable for most desktops and SFF systems.
  • UART technology: Based on the 16C1050 family for reliable multi-port serial handling across all channels.
  • Supported protocols: RS-232, RS-422, and RS-485 (2-wire or 4-wire) on each port, enabling versatile connections to a wide range of devices.
  • Operating systems: Windows and Linux support with vendor-provided drivers to ensure compatibility and easy deployment.
  • Protection: Built-in ESD protection to minimize risk of damage from static discharge during installation and operation.
  • Compliance: TAA-compliant, making it suitable for government and enterprise procurement programs.
  • Physical characteristics: Standard PCIe card form factor with DB9 connectors for straightforward cabling and a clean installation; supports multiple serial device configurations in a single slot setup.

How to Install StarTech.com 4-Port Serial PCIe Card

  • Power down and unplug the system. Safely shut down your computer, disconnect power, and open the chassis to access the motherboard and PCIe slots.
  • Locate an available PCIe slot. Find a free PCIe x1 slot and remove any appropriate slot cover on the rear of the enclosure to accommodate the card’s port bracket.
  • Insert the card into the PCIe slot. Gently press the card into the slot until seated firmly, then secure the card to the chassis with an expansion slot screw.
  • Connect serial cables to the DB9 ports. Attach your RS-232, RS-422, or RS-485 devices to the four DB9 connectors. Configure each port as needed in your OS or device manager.
  • Install drivers and configure ports. Boot the system and install the appropriate Windows or Linux drivers from StarTech’s website if prompted, or allow the OS to recognize the hardware and complete driver installation automatically. Use the provided configuration utility or OS-side settings to assign port modes (RS-232/422/485) and baud rates as required by your peripherals.
  • Test connectivity and verify operation. After installation and driver setup, test each port with your serial devices, confirming data transmission, baud rate accuracy, parity, and flow control as needed for reliable operation.

Frequently asked questions

  • Q: What devices can I connect to the four ports? A: The four DB9 ports support RS-232, RS-422, and RS-485 configurations (2-wire or 4-wire) independently, so you can connect a mix of serial peripherals such as barcode scanners, lab instruments, PLCs, data loggers, and point-of-sale devices.
  • Q: Which operating systems are supported? A: The card offers driver support for Windows and Linux, enabling installation in a wide range of desktops and SFF systems. Always check the latest driver package on StarTech’s site for your exact OS version.
  • Q: Do I need any special drivers or software? A: Yes, install the vendor-provided drivers to ensure all four ports are correctly recognized and configurable. In many cases the OS will automatically detect the hardware and prompt for driver installation.
  • Q: Is this card suitable for industrial environments? A: Yes. Its ESD protection helps guard against static discharge, and the independent port configuration supports robust serial communication with industrial devices. The card is also designed to be compliant with industry procurement standards (TAA).
  • Q: Can I use all four ports simultaneously? A: Absolutely. Each port operates independently and can be configured for RS-232, RS-422, or RS-485, allowing simultaneous connections to multiple devices without mutual interference.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 91103397239

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4.5 ★★★★★
Based on 12 reviews
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A
Ashley
Lake Worth, US
★★★★★ 5
Obsessed With This Ultra Soft, Fluffy, Cozy Blanket
Color: 02 Crystal Pink, Size: Twin (60" x 80"), Color: 02 Crystal Pink, Size: Twin (60" x 80")
I absolutely love this blanket. I ordered the crystal pink color in the 60x80 size to use as a throw blanket for my new cloud couch in my office, and honestly it ended up being exactly what I was hoping for. The material is incredibly soft, fluffy, and comfortable without feeling thin or cheaply made. I’ve actually been searching for another blanket similar to one I previously owned that eventually got a hole in it, and this one gave me that same cozy feeling immediately. It’s one of those blankets you instantly want to curl up in the second you touch it. One thing I really liked is that the bubble texture actually has dimension and volume to it. A lot of blankets advertised with this kind of design end up looking flat in person, but this one genuinely has that plush “bubble” effect and makes the blanket feel extra cozy and luxurious. The size is also great. It’s large enough to comfortably use on a couch while still being big enough for a twin bed if you wanted to use it that way. For me personally, it’s the perfect oversized throw blanket size. I honestly have nothing negative to say about it. The quality feels great, the stitching looks well done, the color is beautiful, and overall it feels thoughtfully made rather than cheaply mass produced. For around $25, I absolutely think it’s worth it. This has easily become one of my favorite cozy blankets in the house.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
C
Customer Review
San Leandro, US
★★★★★ 1
Mediocre and lacks required fabric content label
Color: 01 Off White, Size: Twin (60" x 80"), Color: 01 Off White, Size: Twin (60" x 80")
I am a "blanket person," meaning I love to be cozy, curled up on the couch, watching movies with my family, and using many different layers and types of blankets on my bed for different seasons. I was excited to order this 3D bubble fleece blanket by Lotus Karen because I have another 3D bubble fleece throw blanket that I absolutely love. The other one has a sherpa lining, which makes it a bit too warm for warmer seasons. This one by Lotus Karen is unlined, which I expected as the listing doesn't say it is lined. However, I'm feeling let down over the softness of the fleece compared to my other one. They all look similar in list photos, but they do not feel the same. After I unfurled this one onto my bed to let it fluff up, which it did after 90-minutes, but instead of the pile feeling plush and silky (like faux rabbit) this one feels more rough. It's not as high quality fleece, even though it looks the same in photos. Undeterred, I still really wanted to like this blanket and went to put it into the laundry, hoping it would bring out the best in it. However, I noticed that there is no fabric content label at all. Not just missing care instructions, but no label of any kind. Under the Federal Trade Commission (FTC) Textile Products Identification Act, it is a violation of United States federal law to sell a textile product that fails to plainly disclose its constituent fiber percentages, country of origin, and registered manufacturer identity physically attached to the product. Having the information on the online listing does not meet this requirement. Because the material is somewhat mediocre, I would have given it three stars. But because it fails to meet basic consumer protection laws, it loses all.
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Reviewed in the United States on June 1, 2026
L
LP
Birmingham, US
★★★★★ 5
VERY SOFT; MY DOG’S ALREADY APPROPRIATED IT
Color: 01 Off White, Size: Twin (60" x 80")
You know a blanket’s soft when my dog immediately tries to appropriate it. This is incredibly soft, and actually pretty light; it makes for a good spring or summer blanket, or a throw in addition to something else in colder weather. (The twin is big enough that you can double it up over yourself to make it thicker in colder months.) I’m not sure while it’s called a “bubble” blanket - there is a very gentle egg crate shape to it, but it’s not rigid at all, and not dual-layer or filled with air or anything. It’s a very comfy throw (my dog can also attest to that) and for ~$20 (at the time of this review), it’s a great deal. I haven’t noticed any shedding, either, but I’m going to wash it on as gentle a cycle I can, to be safe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
A
Verified Purchase
A-K-O
Massapequa, US
★★★★★ 5
I WANT MORE!!
Size: 60" X 80", Color: Sage Green
I knew I'd probably like this blanket, but I wasn't ready to immediately fall in love with it! It's fluffy, it's soft, it's warm, it's comforting (like being hugged & held), it's dark (like blackout curtain dark), the color is vibrant (I got green), and it's machine washable & dryer safe with ZERO SHEDDING! I WANT MORE!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
D
Verified Purchase
Dawn Thomas
Los Angeles, US
★★★★★ 5
Loving my purchase
Size: 50" X 60", Color: Sage Green
I am so happy with this faux fur throw! It’s unbelievably soft, cozy, and feels so luxurious. The color is gorgeous — even prettier in person — and it adds such a warm, stylish touch to my space. I love everything about it and would definitely buy it again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 12, 2025

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