





PEX4S953
Authorized Partner

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StarTech.com PEX4S953 4-Port PCIe Serial Adapter Card, 921.6Kbps Speed, 16950 UART, 256-byte FIFO Cache, RS232 DB9 Ports, Full/Low Profile (Lifetime Warranty)
FREE Returns
RS232 DB9
921.6Kbps
Compatible
FIFO Cache
Interface
Brackets
--
hrs--
mins
Pairs well with
In stock! Ships within 1-2 business days.
30 days Free Return
Complimentary shipping & returns
Limited warranty: Lifetime
Key Features
- 🔌 4 RS232 (DB9) serial ports via PCI Express slot
- ⚡ High-speed data transfer up to 921.6Kbps
- 💻 Compatible with Windows and Linux systems
- 🔧 Includes both full-size and low-profile brackets
- 🎯 16950 UART compatible with 256-byte FIFO cache
- ⚙️ Supports 5-9 data bits per port
- 🔋 5/12V power output on Pin 9 with external power
- 🛡️ Lifetime warranty included
- ♻️ RoHS, WEEE, and REACH certified

StarTech.com PEX4S953 4-Por...

High-Performance PCIe Serial Card with Advanced UART Technology
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

Industrial-Grade DB9 Serial Port Interface
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

Efficient Power Management and Port Configuration
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

Enhanced Thermal Design for Reliable Operation
Technical Specifications
- Optimized thermal management
- Industrial-grade PCB materials
- Strategic component placement
Applications
- 24/7 operation environments
- High-temperature industrial settings
- Mission-critical applications

Precision-Engineered Circuit Design
Technical Specifications
- Advanced Asix AX99100 chipset
- Optimized signal routing
- EMI-minimizing design
Applications
- Sensitive measurement equipment
- High-speed data acquisition
- Precision control systems

Complete Connectivity Solution with Break-out Cable
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
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We ship orders 24-48 hours after they have been placed. It might take up to an additional 48 hours to ship international orders.
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Refund Policy
Standard Return Policy:
We offer a hassle-free 30-day returns policy for domestic (US)
orders, excluding non-refundable items. Refund or Replacement within 30
days of the delivery date. All products that fall under the Standard
Return Policy qualify for our 30-Day Hassle-Free Returns.Replacement Only Return Policy:
Replacement within 30 days of the delivery date.
Manufacturer Only Return Policy:
Covered by the manufacturer's warranty. Please refer to the terms and
conditions for the manufacturer's warranty or contact the manufacturer.
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
Serial Card
Low Profile Bracket
Break-out Cable
Quick Start Guide
Accessories
Extension Cable
Male/Female
High Quality
Configuration
Lightweight
Monitor/Mouse
Extended Reach
Dual Connectors
Pure Conductor
Corrosion Resistant
Certified Quality
Lightweight
Extended Reach
Serial Adapters
Signal Protection
Pure Conductor
Molded Ends
Lightweight
Extension Length
Serial Connector
Conductor
Certified
6.56 ft
RS232
Copper
9-pin
Wire Gauge
Molded