StarTech.com PEX4S953 PCIe serial card showing circuit board and DB9 connector mounted on full-profile bracket

High-Performance PCIe Serial Card with Advanced UART Technology

The PEX4S953 PCIe serial card integrates sophisticated 16950 UART technology with a 256-byte FIFO cache for superior data handling. The green PCB houses the Asix AX99100 chipset, delivering reliable serial connectivity through its DB9 interface. The full-profile bracket design ensures secure mounting in standard PC cases.

Technical Specifications

  • 16950 UART with 256-byte FIFO cache per port
  • PCIe 1.1 compliant interface
  • Maximum baud rate of 921.6 Kbps

Applications

  • Industrial automation system integration
  • Legacy device connectivity in modern systems
  • Point-of-sale terminal deployment
Close-up view of DB9 serial port connector on full-profile mounting bracket

Industrial-Grade DB9 Serial Port Interface

The robust DB9 RS-232 connector features a precision-engineered metal housing secured with dual mounting screws for reliable connections. The full-profile bracket construction provides optimal stability for industrial environments where connection integrity is crucial.

Technical Specifications

  • RS-232 DB9 interface standard
  • Secure dual-screw mounting design
  • Industrial-grade metal construction

Applications

  • Manufacturing equipment integration
  • Laboratory instrument connections
  • Secure data collection systems
Side angle view of PCIe serial card showing power connector and component layout

Efficient Power Management and Port Configuration

Advanced power distribution architecture supports both 5V and 12V output on Pin 9 when external power is connected. The card's intelligent design includes power management features and flexible port configuration options to accommodate various serial devices.

Technical Specifications

  • Dual voltage support (5V/12V) on Pin 9
  • Efficient power management system
  • Multiple data bit configuration options

Applications

  • Power-sensitive device integration
  • Multi-device serial networks
  • Custom industrial solutions
Top view of PCIe serial card showing thermal design and component layout

Enhanced Thermal Design for Reliable Operation

The optimized component layout and thermal design ensure stable operation in demanding environments. Strategic placement of critical components and the use of high-quality PCB materials contribute to superior heat dissipation and long-term reliability.

Technical Specifications

  • Optimized thermal management
  • Industrial-grade PCB materials
  • Strategic component placement

Applications

  • 24/7 operation environments
  • High-temperature industrial settings
  • Mission-critical applications
Detailed view of PCIe serial card circuit board showing component layout

Precision-Engineered Circuit Design

The meticulously designed circuit board features the latest Asix AX99100 chipset implementation with carefully routed traces for optimal signal integrity. Each component is strategically placed to minimize interference and maximize performance.

Technical Specifications

  • Advanced Asix AX99100 chipset
  • Optimized signal routing
  • EMI-minimizing design

Applications

  • Sensitive measurement equipment
  • High-speed data acquisition
  • Precision control systems
PCIe serial card with attached break-out cable showing four DB9 connectors

Complete Connectivity Solution with Break-out Cable

The included break-out cable assembly provides four individual DB9 serial connections, enabling simultaneous connection to multiple devices. Each cable is clearly marked and constructed with high-quality materials for reliable signal transmission.

Technical Specifications

  • Four individual DB9 RS-232 ports
  • High-quality shielded cabling
  • Secure connector design

Applications

  • Multi-device monitoring systems
  • Complex industrial control setups
  • Distributed sensor networks

Product details

General Information
Manufacturer

StarTech.com

Manufacturer Part Number

PEX4S953

Brand Name

StarTech.com

Product Name

4 Port Full Profile Serial Card

Packaged Quantity

1

Product Type

Multiport Serial Adapter

Technical Information
Host Interface

PCI Express 1.1

Maximum Data Transfer Rate

921.60 kbit/s

UART Type

16950

Platform Supported

PC
Linux

Interfaces/Ports
Ports Expandability

4 x DB-9 RS-232 - Serial, Via Cable

Physical Characteristics
Form Factor

Plug-in Card

Miscellaneous
Package Contents

  • 4 Port Full Profile Serial Card
  • 1 x Low Profile Bracket
  • 1 x Break-out Cable
  • 1 x Quick Start Guide

Environmentally Friendly

Yes

Environmental Certification

RoHS
WEEE
REACH

Country of Origin

Taiwan

Warranty
Limited Warranty

Lifetime

Included in the Box

  • icon_list|serial card|Serial Card Main unit icon

    Serial Card

  • icon_list|low profile bracket|Low Profile Bracket Mounting bracket icon

    Low Profile Bracket

  • icon_list|break-out cable|Break-out Cable Connection cable icon

    Break-out Cable

  • icon_list|quick start guide|Quick Start Guide Documentation icon

    Quick Start Guide

FAQs

What are the main features of the StarTech.com PEX4S953 Serial Card?
The StarTech.com PEX4S953 is a PCI Express serial card that offers four RS232 (DB9) ports, featuring a 16950 UART compatibility, 256-byte FIFO cache per transmitter and receiver, and supports data transfer speeds up to 921.6Kbps. It includes both full-profile and low-profile brackets, supports 5-9 data bits per port, and provides 5/12V power output on Pin 9 when external power is connected. The card uses an Asix AX99100 chipset and is PCIe 1.1 compliant.
What operating systems is the PEX4S953 compatible with?
The PEX4S953 offers broad operating system compatibility, supporting both Windows and Linux platforms. This wide OS support makes it particularly suitable for integration into mixed computing environments, ensuring maximum versatility for IT professionals and system integrators.
What is the maximum data transfer rate of the PEX4S953?
The PEX4S953 supports a maximum data transfer rate of 921.6Kbps, making it suitable for high-speed serial communications with various devices such as card readers, printers, PIN pads, and modems. This speed capability ensures efficient data transmission for demanding serial applications.
What comes included in the PEX4S953 package?
The package includes the 4 Port Full Profile Serial Card, a low-profile bracket for alternative case mounting, a break-out cable for connectivity, and a Quick Start Guide for installation and setup. This complete package ensures users have everything needed for installation in either full-height or low-profile systems.
What type of warranty does StarTech.com offer for the PEX4S953?
StarTech.com provides a lifetime warranty for the PEX4S953, along with free lifetime technical support. This comprehensive warranty coverage demonstrates StarTech.com's confidence in the product's reliability and their commitment to customer satisfaction.

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