StarTech.com PEX2S953 - PCI-E RS232 Serial Card Asix AX99100
Features
2 Port Serial Card
Serial controller card w/16950 uart based on asix ax99100, allows 2x db9 ports w/bi-directional rs232 speeds up to 921.6kbps per port, available 256 byte fifo buffer & 9th data bit | upgraded version of our popular card pex2s952.
Optional Configurable Power
Pci express rs232 serial adapter card provides choice of 12v, 5v, or none through pin 9 w/up to 2a total; each of the 2 ports are individually configurable.
Standard Profile & Low Profile Bracket
Pcie multiport serial card comes w/ a standard bracket pre-installed & 2x low profile brackets incl for versatile install; supports windows xp and up & linux.
Versatile Applications
For standard profile desktop/servers with uses in point of sale terminals, plcs, control/automation in factories, scientific sensors, medical equipment, scanners, oscilloscope.
This multiport PCI Express RS232 serial adapter card lets you add two RS232 (DB9) serial ports to your computer through a PCI Express (PCIe) slot, as if they were native serial ports. The dual port PCIe serial card enables you to interact with serial devices, such as card readers, printers, PIN pads, and modems, at speeds of up to 921.6Kbps.
Maximum Compatibility
With broad OS support, including for Windows and Linux, this 2 port PCI E serial card is easy to integrate into mixed environments. The card comes pre-configured with a full-profile bracket, and includes optional low-profile brackets, so installation is easy regardless of the case form factor. This card is a direct replacement for PEX2S953LP.
Experience Optimal Technology
This PCIe to serial adapter supports the following features:
Industry standard 16950 UART compatible
Supports max baud rate of up-to 921.6Kbps
Provides 5/12V power output on Pin 9 when external power is connected
256-byte depth FIFO cache per transmitter and receiver
Supports 9, 8, 7, 6, 5 data bits (one per port)
Asix AX99100 chipset
Base PCI Express 1.1 compliant
Low and full-profile brackets included
Specifications
Technical Specifications
| 1 - Connector Type(s) | PCI Express x1 |
|---|---|
| 1 - Internal Ports | LP4 (4 pin; Large Drive Power) |
| 2 - External Ports | DB-9 (9 pin, D-Sub) |
| Operating Temperature | -10°C to 80°C (14°F to 176°F) |
| Storage Temperature | -20°C to 100°C (-4°F to 212°F) |
| Humidity | 5~85% RH |
| Ports | 2 |
| Interface | Serial |
| Bus Type | PCI Express |
| Card Type | Standard Profile (LP bracket incl.) |
| Port Style | Integrated on Card |
| Package Height | 1.2 in [30.0 mm] |
| Package Length | 5.6 in [14.2 cm] |
| Shipping (Package) Weight | 4.8 oz [136.0 g] |
| Package Width | 6.7 in [17.0 cm] |
| Serial Protocol | RS-232 |
| Max Baud Rate | 921.6 Kbps |
| Data Bits | 5, 6, 7, 8, 9 |
| FIFO | 256 Bytes |
| Flow Control | None, Xon/Xoff, RTS/CTS |
| Parity | None, Odd, Even, Space, Mark |
| Stop Bits | 1, 1.5, 2 |
| MTBF | 222,366 hours |
| Product Height | 0.6 in [15.0 mm] |
| Product Length | 3.0 in [75.0 mm] |
| Weight of Product | 2.0 oz [56.0 g] |
| Product Width | 2.5 in [63.0 mm] |
| Material | Steel |
| OS Compatibility | Windows® 7, 8, 8.1,10Windows Server® 2003, 2008 R2, 2012, 2012 R2, 2016Linux 2.4.x to 2.6.x LTS Versions only |
| Microsoft WHQL Certified | Yes |
| Note | Selectable power output on pin 9 of the serial port |
| 1 - Included in Package | Two Port Serial Card; Quick Start Guide |
| 2 - Included in Package | Low Profile Bracket |
| Brand | StarTech.com |
|---|---|
| Product Type | Networking > Network Accessories |
| Weight | 0.023 kg |
| Warranty |
|---|
Note:
Warranty period is as stated above unless the manufacturer has chosen to specify a longer period.
All warranties are return to base unless otherwise specified.
Shipping Information
- Free NZ-wide shipping on orders over $299
- Standard delivery 2–5 business days
- Rural delivery may take an additional 1–2 days
- Same-day dispatch for orders placed before 2pm (weekdays)
Returns Policy
- 7-day returns on unused items in original packaging
- Faulty or damaged products covered under warranty
- Contact our support team to initiate a return








