Brainboxes 8 Port RS232 PCI Express Serial Card with 25 Pin Connectors

The Brainboxes 8 Port RS232 PCI Express Serial Card provides a powerful, scalable way to add eight independent RS232 serial ports to a desktop or workstation. Designed for reliability in demanding environments, this PCIe card delivers eight 25-pin DB-25 connections, enabling robust, low-latency communication with a wide range of serial devices. With data transfer rates up to 921,600 baud per port and 128-byte deep transmit and receive FIFOs, you gain both speed and resilience—perfect for multi-device control, data collection, legacy equipment integration, and industrial automation. The high-performance 1 Mbit/s line drivers ensure stable signaling across cabling lengths and electrical environments, delivering crisp data transmission even in noisy settings. Whether you’re building an industrial PC, upgrading a POS workstation, or integrating legacy equipment with modern computing, this Brainboxes card is engineered to maximize throughput while keeping installation straightforward.

• Eight RS232 ports on a single PCI Express card — Add eight independent COM ports to your computer using standard 25-pin DB-25 connectors. Each port is individually accessible, enabling simultaneous multi-device communication without the need for external hubs or multiple expansion cards. Ideal for complex automation setups, data logging across multiple sensors, or running several serial peripherals from one compact expansion card.
• High-speed, reliable serial performance — Support for data rates up to 921,600 baud per port ensures fast, responsive communication with serial devices. The 128-byte transmit FIFO and 128-byte receive FIFO help absorb bursts of data and prevent overflow, reducing data loss in busy applications. Coupled with 1 Mbit/s line drivers, this card maintains strong signal integrity across typical cables and distances encountered in professional environments.
• Flexible compatibility and driver support — Engineered to work with Windows environments, the Brainboxes card includes drivers for Windows 32-bit and 64-bit operating systems. This makes deployment straightforward in both legacy and modern systems, with familiar COM port-style access from common terminal programs, SCADA software, or custom applications. The broad compatibility minimizes integration hurdles when connecting a mix of serial devices and software tools.
• Robust PCI Express interface for modern systems — Built on a reliable PCI Express bus interface, this card fits into a wide array of desktop and workstation systems. Its compact design and robust construction are suited for office environments, manufacturing floors, or any setting requiring dependable serial expansion without compromising system performance.
• Ideal for professional, multi-device setups — Use cases include industrial automation, point-of-sale data capture, telemetry, hardware console management, and data acquisition. The eight-port capability provides a scalable path to expand serial connectivity as your environment grows, while the reliable electronics and proven drivers reduce downtime and simplify maintenance.

Technical Details of Brainboxes 8 Port RS232 PCI Express Serial Card 25 Pin Connectors

• Ports: 8 x RS232 serial ports
• Interface: PCI Express (PCIe) bus
• Connectors: Eight DB-25 25-pin connectors for RS232 signaling
• Baud rate: Up to 921,600 baud per port
• Transmit/Receive FIFOs: 128-byte deep transmit FIFO and 128-byte deep receive FIFO
• Line drivers: 1 Mbit/s capable line drivers for stable signaling
• Driver support: Windows 32-bit and 64-bit operating systems
• Compatibility: Standard RS232 signaling with widely supported port addressing

How to install Brainboxes 8 Port RS232 PCI Express Serial Card

• Power down the computer and unplug the power cord. Open the case and ground yourself to prevent static discharge.
• Locate an available PCI Express slot (x1 or larger) and remove the slot cover if needed. Align the card and firmly seat it into the PCIe slot until it is fully engaged.
• Secure the card with a screw to the chassis to prevent movement.
• Attach your serial devices to the eight DB-25 connectors on the card using standard RS232 cables. Plan your port mapping to simplify software configuration (e.g., COM1 through COM8).
• Reconnect power, boot the computer, and install the driver package from Brainboxes. Follow the on-screen prompts to complete the installation, then restart if requested.
• After reboot, open Device Manager (Windows) and verify that eight new COM ports appear under Ports (COM & LPT). Configure your software to use the corresponding COM ports, and you’re ready to operate your serial devices.

Frequently asked questions

• Q: What is the maximum baud rate supported per port? A: Each of the eight RS232 ports supports up to 921,600 baud, enabling high-speed data transfer for demanding serial devices.
• Q: Which operating systems are supported? A: The card provides drivers for Windows systems, including 32-bit and 64-bit environments. Verify the latest Brainboxes driver package for your exact OS version.
• Q: How many serial devices can I connect? A: Up to eight independent RS232 devices can be connected simultaneously via the eight DB-25 connectors.
• Q: Do I need special software to access the ports? A: In most cases, standard terminal programs or application software that can open and manage COM ports will work. The eight COM ports appear as separate devices in the OS, just like standard serial ports.
• Q: Is additional power required for the card? A: No extra power supply is typically required beyond the PCIe slot; the card draws power from the motherboard’s PCIe connection as part of normal operation.