Product Type | Serial Adapter Card |
Form Factor | Plug-in card - low profile |
Chipset | ASIX AX99100 |
Bus Type | PCI Express |
Bus Interface | PCI Express x1 |
Supported UART | 16950 UART |
Maximum Data Transfer Rate | 921.6 Kbps per port |
FIFO Buffer | 256 bytes |
Operating System Support | Windows, Linux |
Included Accessories | Low profile bracket |
Power Output on Pin 9 | 5V/12V/None (configurable), up to 2A total |
Connectivity Technology | Wired |
Enclosure Color | Green |
What's Included | 1 - PCIe Serial Card |
StarTech 2-Port PCIe RS232 Serial DB9 Adapter Card PEX2S953LP





Key Benefits

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AI-Powered Summaries from Online Customer Reviews
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- Provides industrial-grade serial connectivity for legacy equipment with up to 921.6Kbps speed per port
- Flexible installation in full or low-profile systems using included brackets
- Built-in selectable power output on DB9 ports enables direct powering of devices, reducing installation complexity
Product Overview
2-port PCI Express RS232 serial controller card w/16950 UART/ASIX AX99100 - Bi-directional speeds 921.6Kbps/port / 256 byte FIFO / 9th data bit - Pin 9 pwr out 5v/12v/none w/up to 2A total - Expansion card w/low profile bracket (Std incl) - Win/LinuxSpecifications
Product Overview
Physical & Environmental
Width | 3.1 inch |
Depth | 4.4 inch |
Height | 0.9 inch |
Weight | 0.13 lb (approx. 59 g) |
Operating Temperature | 0°C to 55°C (32°F to 131°F) |
Storage Temperature | -20°C to 70°C (-4°F to 158°F) |
Operating Humidity | 5% ~ 85% RH (non-condensing) |
Storage Humidity | 5% ~ 85% RH (non-condensing) |
Cloud Management & Licensing
Cloud Management |
Interfaces
Interface Type | RS-232 |
Port Count | 2 |
Serial Port Connector Type | DB9 (9-pin D-sub) |
PCI Express Interface | 1 x PCIe x1 |
Power Connector | 1 x LP4 (4-pin Large Drive Power) |
Compliance & Origin
Country of Origin | Taiwan |
TAA Compliant | Yes |
Certifications | CE, FCC, RoHS, REACH |
Warranty | Lifetime |
Advanced Security Features
Hardware Flow Control | Yes |
Parity Support | Odd, Even, Mark, Space, None |
Stop Bits Support | 1, 1.5, 2 |
Data Bits Support | 5, 6, 7, 8, 9 |