StarTech.com
StarTech.com 6ft 1-Port Professional RS422/485 USB Serial Cable Adapter with COM Retention
Best industrial adapter for reliable serial device connectivity in professional environments.
Connect your host computer to industrial serial devices using this professional 6ft (1.8m) StarTech.com USB to RS422/485 adapter. It reliably bridges USB Type-A to a DB-9 RS-422 Serial port, supporting both RS422 and RS485 standards. A standout feature is COM Retention, which maintains the assigned COM port number across system reboots for consistent operation. This adapter is TAA compliant, ensuring suitability for government and professional environments. It offers a dependable solution for data transfer applications requiring stable serial communication.
$113.22
Owner Satisfaction
4.7
/ 5
Category Rank
4
/ 1154
#4 in Computer Interface Cards & Adapters
Price vs Category Average
-80%
Below average
Cable Length
61.8
/ ft (m)
Who it's for
- Technicians deploying reliable data networks across long physical distances
- IT professionals managing software that requires consistent port assignments
- Engineers needing versatile support for multiple industrial communication protocols
Who should skip it
- General users who only require basic RS232 serial connections
- Budget-conscious buyers seeking simple, low-cost serial connectivity solutions
- Casual users lacking experience with manual network termination and configuration
Performance breakdown
Connection Stability
COM retention ensures your serial settings remain locked after every reboot.
Protocol Versatility
Seamlessly bridges USB to both RS422 and RS485 industrial standards.
Build Durability
Rugged casing designed to withstand demanding professional and industrial environments.
Compliance Standards
TAA compliance makes this a reliable choice for government-level procurement.
Physical Reach
Six-foot cable provides ample length for flexible equipment placement.
Setup Simplicity
Straightforward plug-and-play functionality minimizes configuration headaches for IT professionals.
Key Specs
Cable Length
6ft (1.8m)
Host Connector
USB Type-A Female (USB 1.1)
Device Connector
DB-9 RS-422 Serial Male
Supported Protocols
RS-422, RS-485
Certifications
TAA Compliant, RoHS, REACH, WEEE
Weight
3.53 oz (99.9g)
Warranty
2 Year Limited Warranty
Color
Black
Features
- Maintains consistent COM port assignment after reboot
- Supports both RS422 and RS485 communication standards
- Provides a reliable USB to serial connection
- TAA compliant for professional use
- 6ft (1.8m) cable length for flexible placement
- Features a durable black casing
What customers say
This USB serial adapter earns high praise primarily for its exceptional reliability and stability, crucial for industrial and engineering applications. Users value the superior chipset and robust driver support ensuring seamless integration across different operating systems. The standout feature is the consistent COM port retention, which saves significant time for professionals relying on fixed port assignments. While the initial cost is higher than basic alternatives, the consensus is that this adapter delivers superior value through its professional grade performance and durability. It minimizes downtime, making it a highly recommended tool for demanding technical tasks where dependable connectivity is essential.
Know before you buy
COM port retention ensures that the adapter keeps the same assigned COM port number even after you disconnect the device or reboot your computer. This prevents configuration errors in your software, so you don't have to manually reassign ports every time you plug it back in.
Yes, this adapter is designed to support both RS422 and RS485 communication standards, making it a versatile choice for various industrial serial applications.
Yes, this product is TAA compliant, which means it meets the requirements for government procurement and use in professional environments that mandate TAA-compliant hardware.
No, the adapter is powered directly through the USB connection from your host computer, eliminating the need for an external power brick or wall outlet.
The cable is 6 feet (1.8 meters) long. This length provides enough reach to connect equipment located on a desk or nearby rack without needing additional extension cables.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$113