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Description
Brainboxes 4 Port RS232 Low Profile PCI Serial Port Card DB9This Brainboxes 4 Port RS232 Low Profile PCI Serial Port Card DB9 is a universal PCI expansion that brings four dependable RS232 serial interfaces to a compact, half height form factor. Engineered for reliability in demanding environments, this card is ideal for expanding legacy device connections on modern PCs without compromising performance. With four DB9 ready ports, it makes it simple to integrate data loggers, industrial controllers, POS
This Brainboxes 4 Port RS232 Low Profile PCI Serial Port Card DB9 is a universal PCI expansion that brings four dependable RS232 serial interfaces to a compact, half-height form factor. Engineered for reliability in demanding environments, this card is ideal for expanding legacy device connections on modern PCs without compromising performance. With four DB9-ready ports, it makes it simple to integrate data loggers, industrial controllers, POS systems, and other serial devices into a single, tidy computing setup. Built for speed and stability, it balances classic serial communication with contemporary PC compatibility.
- Four RS232 ports in a single low-profile PCI card: Add four fully functional RS232 serial ports to your PC using one compact, half-height card, freeing expansion slots for other peripherals while delivering robust, legacy-friendly connectivity.
- High-speed serial performance: Supports data transfer rates up to 115,200 baud with 64-byte deep transmit and 64-byte deep receive FIFOs, ensuring efficient, low-latency data flow for multiple serial devices simultaneously. The 1 Mbit/s line drivers provide strong signaling over standard cables and longer runs.
- Universal PCI compatibility with Windows 32-bit drivers: Designed to work across a wide range of PCI-equipped systems, the card includes drivers for all Windows 32-bit environments, simplifying installation and minimizing compatibility hurdles for legacy applications.
- Low-profile design for compact builds: The card’s low-profile (half-height) form factor fits slim or compact PC cases, making it a practical choice for industrial kiosks, point-of-sale stations, or embedded computing where space is at a premium.
- Reliable, plug-and-play expansion for legacy devices: Ideal for integrating older serial hardware with modern PCs, providing a stable platform for data acquisition, instrumentation, and serial-enabled peripherals without sacrificing system stability or performance.
Technical Details of Brainboxes 4 Port RS232 Low Profile PCI Serial Port Card DB9
- Ports: 4 x RS232 serial ports using DB9 connectors
- Interface: PCI (low-profile/half-height) expansion card
- Data rate: Up to 115,200 baud
- Transmit FIFO: 64-byte depth
- Receive FIFO: 64-byte depth
- Line drivers: 1 Mbit/s signaling capability
- Driver support: Includes Windows 32-bit drivers for easy installation
- Connectivity: Four DB9 serial ports for immediate device compatibility
how to install Brainboxes 4 Port RS232 Low Profile PCI Serial Port Card DB9
Installing this card is straightforward and designed to work with most standard PC configurations. Follow these steps to add four RS232 ports to your system quickly and with minimal downtime:
- Power off the computer, unplug from the mains, and open the chassis to access the PCI slots.
- Identify an available PCI slot, preferably a PCI or PCI-X slot depending on your motherboard’s compatibility, and remove the slot cover to allow access for the card.
- Insert the Brainboxes 4-port low-profile PCI serial card firmly into the slot until it sits evenly and is fully seated in the bus.
- Secure the card to the chassis with the appropriate mounting screw or bracket, ensuring it is stable and does not wobble.
- Reconnect the case, power up the system, and boot into your operating system.
- Install the included Windows 32-bit drivers (or download the latest version from Brainboxes’ support site) to enable the four serial ports. Follow the on-screen prompts to complete the driver installation.
- Once the drivers are installed, verify the new ports in Device Manager under “Ports (COM & LPT)” and test each port with a compatible serial device or loopback test to confirm proper communication.
- Reconnect your serial peripherals to the new DB9 connectors and configure software to use the correct COM port assignments and speeds as needed by your application.
Frequently asked questions
- How many serial ports does this card provide? It provides four RS232 serial ports via DB9 connectors, all accessible from the same PCI card.
- What is the maximum data rate supported by the card? The card supports data transfer rates up to 115,200 baud for each port.
- What are the FIFO depths? Each port has a 64-byte transmit FIFO and a 64-byte receive FIFO to help manage data flow and reduce bottlenecks in busy serial applications.
- What kind of drivers are included? The card includes Windows 32-bit drivers for easy installation on compatible operating systems.
- Is this a full-height card or a low-profile card? This is a low-profile (half-height) PCI card designed for compact PC builds and slim chassis systems.
- What kinds of devices are best suited for this PCI serial card? It is ideal for connecting legacy serial equipment such as industrial controllers, data loggers, POS terminals, laboratory instruments, and other DB9-compatible devices to modern PCs.
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Exchange/Return Notes
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4.8 ★★★★★
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Product Reviews
★★★★★ 5
Light enough for one person to move, sturdy and so versatile
Size: 48" X 10', Color: Grey, Number of Items: 1
The AmazingSpark Soundproof room divider panel has been a fantastic addition to my classroom. Its sound-absorbing design noticeably reduces noise, which makes small group instruction, testing sessions, and independent work time much more manageable. The panel is lightweight yet sturdy. The included stand and straps keep it securely in place. I appreciate how easily it folds - setup and storage take only a minute, which is perfect for transitioning from one activity to another. The grey color looks clean and professional, and I can use push-pins to hang displays on the board. The divider delivers exactly what teachers need: privacy, noise reduction, flexibility, and durability. The noise reduction feature has been beneficial in my classroom when students are recording projects. While the class is working quietly on other activities, a small group can move to the opposite side of the panel and record their audio files. When we listened to the files, we could not hear any background noises, with the exception of the noises they wanted in their recording. This panel is made to last, and I would recommend it for anyone who is looking for an acoustic panel that is flexible. The panel is extremely versatile, and because of that, I think it is a good value for the money. Noise reduction, privacy screen, or to section off one area from the rest of the room are just a few of the uses of this product.
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Reviewed in the United States on November 24, 2025
★★★★★ 4
Easy To Use
Size: 48" X 6', Color: Grey, Number of Items: 1
Panel measures 48x6 and is super easy to install/put up. It's made of a soft thick material that has an accordion shape style/design and stands up nicely wherever you put it. Quality of the material is good- it's light, easy to use and can be moved with ease. It's also sturdy for being soft and does the job if you're looking for a room divider if this size. The height is shorter than the standard style divider but serves the purpose. Says it has 'soundproof properties'- may absorb some noise but you can still hear. I'd recommend it if you're looking for this style of partition wall for privacy. Noise factor not sure but the material it's made of looks like it should absorb some noise. Moreso recommended for the function, separation and quality.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
A Game-Changer for Focus and Privacy!
Size: 48" X 6', Color: Grey, Number of Items: 1
I was excited to try out this Soundproof Room Divider Panel, and it has genuinely exceeded my expectations! I set up the 48" x 6' grey panel in my home office, which is often subject to noise from the rest of the house, and the difference in my ability to concentrate is remarkable. The combination of the acoustic foam and felt really does a fantastic job of dampening ambient sounds, making it a true soundproofing and privacy solution. Assembly was a breeze; the included curved support stands attach quickly, and the panel is stable yet lightweight, making it super easy to move around and reposition as needed. The fact that it folds down to a compact 48" x 15" is a huge bonus for storage, but I honestly haven't needed to put it away because it's so useful!
I love the multi-functional nature of this partition. Beyond just reducing noise, the felt surface acts as an excellent display board, I've already started using thumbtacks to pin up project notes and schedules. It’s given me a dedicated, quiet, and visually organized workspace. The flexibility of the foldable design means I can position it in various shapes to customize the privacy zone. For anyone who needs to carve out a peaceful space for studying, working, or even just relaxing in a shared environment, this is an excellent, high-quality solution. The grey color is sleek and unobtrusive, blending seamlessly into my decor. I highly recommend this portable acoustic divider—it's been a great addition to my home.
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Reviewed in the United States on October 16, 2025
★★★★★ 4
Not sure about the price, but solid!
Size: 48" X 10', Color: Grey, Number of Items: 1
This soundproof divider worked surprisingly well for creating a quieter workspace. It doesn’t block all noise, but it definitely reduces echoes and softens background sounds. The panel is sturdy, easy to fold, and the stand keeps it stable. Great for extra privacy or separating areas without drilling anything.
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Reviewed in the United States on November 24, 2025
★★★★★ 5
A Lifesaver for Peace and Quiet in a Noisy Apartment
Size: 48" X 10', Color: Grey, Number of Items: 1, Size: 48" X 10', Color: Grey, Number of Items: 1
Living with a very loud senior with hearing issues can be quite challenging, but this soundproofing room divider has been a game changer! The panel, crafted with acoustic foam and felt, significantly reduces noise, creating a peaceful and private environment in my home. It's perfect for setting up in my study room or bedroom, allowing me to focus without distractions.
This divider isn't just for noise reduction; it also serves as a handy display board. I can easily use thumbtacks and hook-and-loop fasteners on its felt surface for presentations or home education purposes. The versatility makes it ideal for office meetings and visual displays too.
The package includes a foldable privacy panel, two curved support stands, a fastening strap, and non-slip tape. Measuring 48" X 6' when open, it folds down to a compact 48" x 15", providing flexible layout options. Assembly is a breeze—just attach the curved legs, and it's ready to go!
I appreciate that the divider is lightweight and portable, making it easy to move around. The design is safe, with no sharp edges, and includes anti-slip tape and stable stands to ensure it stays in place. Overall, this soundproofing divider has truly improved my living situation, and I highly recommend it to anyone needing some peace and quiet in a noisy environment!
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Reviewed in the United States on October 13, 2025