Quick Summary
The StarTech.com PEX1S553LP is a 1-port PCI Express RS232 serial adapter card with a 16550 UART and a single DB9 port. It is a low profile expansion card that also includes a full profile bracket.
This card is intended for Windows and Linux systems and offers configurable pin 9 power options of 12V, 5V or none. It also supports bi-directional RS232 speeds up to 460.8Kbps per port and a 256 byte FIFO buffer.
Who It Is Best For
This adapter suits buyers who need to add a serial connection through PCI Express on a desktop or server system. It is also relevant where low profile or standard profile bracket support matters, or where pin 9 power options need to be set for the connected device.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | StarTech.com for clear product identification. |
| Model | PEX1S553LP. |
| Product type | 1-port PCI Express RS232 serial adapter card with a single DB9 port. |
| UART | 16550 UART based on ASIX MCS9922CV-AA. |
| Speed | Bi-directional RS232 speeds up to 460.8Kbps per port. |
| Buffer | 256 byte FIFO buffer. |
| Power on pin 9 | Choice of 12V, 5V or none through pin 9. |
| Bracket support | Low profile bracket pre-installed and 1 full profile bracket included for installation fit. |
| Operating system support | Supports Windows and Linux. |
Why Buyers Choose It
- 1 serial port and a DB9 connector provide a direct single-device serial connection.
- Low profile and full profile bracket options give more flexibility for different case types.
- Configurable pin 9 power adds a useful connection option for supported equipment.
- Windows and Linux support makes it straightforward to match with common operating systems.
What To Know Before You Buy
Check that your system has an available PCI Express slot before ordering. Confirm that your equipment uses a DB9 RS232 serial connection and review whether pin 9 power needs to be set to 12V, 5V or none. If you are fitting the card into a smaller case, the pre-installed low profile bracket is useful, while the included full profile bracket supports standard profile installations.
Common Buyer Questions
Does this card have more than one serial port?
No. It provides 1 DB9 serial port.
Which operating systems does it support?
It supports Windows and Linux.
Does it include bracket options for different cases?
Yes. A low profile bracket is pre-installed and 1 full profile bracket is included.
Can pin 9 power be changed?
Yes. The card provides a choice of 12V, 5V or none through pin 9.
Final Buying View
Choose this card if you need a single-port PCI Express RS232 adapter with DB9 connectivity, bracket flexibility and configurable pin 9 power. Before ordering, confirm the slot type, bracket size and serial requirements of your equipment.
The card is described as an upgraded version of the PEX1S552LPOPTIONAL CONFIGURABLE POWER: PCI Express RS232 serial adapter card provides choice of 12v, 5v, or none through pin 9STANDARD PROFILE und LOW PROFILE BRACKET: PCIe serial card comes with a low profile bracket pre-installed und 1x full profile bracket is incl for versatile install; Supports Windows und LinuxVERSATILE APPLICATIONS: For lowith standard profile desktop/servers with uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscopeTHE IT PRO'S CHOICE: Designed and built for IT Professionals, this PCIe serial adapter card is backed for life, including free lifetime 24/5 multi-lingual technical assistance.
