The Startech 2-Port PCIe RS232 Serial Adapter Card (PEX2S953) is a high-performance expansion controller designed to add dual dependable, high-speed serial communication channels to any standard or low-profile desktop computer or server. Ideal for industrial automation, point-of-sale terminals, scientific equipment, and embedded configurations, this upgrade path introduces native-feeling legacy infrastructure to modern PCI Express motherboards with optimal throughput capability.
Engineered with the advanced ASIX AX99100 chipset, this adapter offers a distinct technology upgrade over older serial cards by delivering selectable 5V or 12V power distribution across Pin 9 alongside bidirectional data transmission speeds up to 921.6Kbps. A generous 256-byte FIFO depth per transmitter and receiver guarantees smooth, low-latency performance under demanding workloads by minimizing CPU overhead and packet loss.
Dual RS232 DB9 Communication: Connects two independent legacy hardware devices natively through standard serial configurations with fully configurable control signals.
Upgraded ASIX AX99100 Architecture: Features a premium industrial controller with 16950 UART compatibility, ensuring optimized timing, stability, and broad platform driver support.
Configurable Power Pin: Supplies a selectable 5V, 12V, or independent unpowered state on Pin 9 of each individual port, pulling extra energy securely via the onboard LP4 drive power inlet.
Flexible Dual-Profile Form Factor: Includes a standard full-height bracket pre-assembled with two additional low-profile brackets provided inside the kit to ensure an effortless installation in compact workstations.
Advanced Data Buffering: Employs a 256-byte deep FIFO cache architecture to prevent data overrun errors while running multi-device automation programs or telemetry polling.
In-Store Advice: Our technicians can help you verify slot configurations, configure system legacy software, and determine COM port mappings for older industrial setups.
Local Support & Advice: Drop by for helpful integration tips, driver verification instructions, and experienced troubleshooting tailored directly to your needs.
$89.00
Only 1 left in stock
%20Specs.webp)
| Weight | .5 kg |
|---|---|
| Dimensions | 15 × 15 × 3 cm |
Hardware Interface Requirements: Fits inside any physical PCI Express x1, x4, x8, or x16 hardware interface motherboard slot while requiring an open LP4 molex connector for active pin power features.
Operating System Compatibility: Features verified operating deployment alongside native platforms including modern Windows 11 systems, enterprise Windows Servers, and major stable Linux frameworks.
| Specification | Technical Detail |
| Model Number / SKU | PEX2S953 |
| Connection | PCI Express x1 Male (Internal) / 2 x DB-9 Male (External) |
| Mouse Sensor | N/A (PCIe Expansion Card) |
| Mouse DPI | N/A (PCIe Expansion Card) |
| Mouse Buttons | N/A (PCIe Expansion Card) |
| Mouse Dimensions | 75 × 63 × 15 mm |
| Compatibility | Windows 11 / macOS / Linux / Windows Server |
| Power Requirements | PCIe Slot Powered / Optional Internal LP4 (4-pin Large Drive Power) Input |
| Included Accessories | User Manual, 1 x Full-Profile Bracket (Attached), 2 x Low-Profile Brackets |
