SKU: 30778122203

StarTech.com 6ft RS422/485 USB Serial Adapter w/ COM Retention

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Description

StarTech.com 6ft RS422/485 USB Serial Adapter w/ COM RetentionThe StarTech. com 6ft RS422 485 USB Serial Adapter with COM Retention is the dependable bridge you need to connect RS422 or RS485 serial devices to a USB enabled computer. Built for professionals who demand reliability in industrial, laboratory, or field environments, this adapter delivers stable serial communications without sacrificing convenience. Its compact, robust design houses a 9 pin DB9 male serial connector and a long, flexible 6 foot cable,

The StarTech.com 6ft RS422/485 USB Serial Adapter with COM Retention is the dependable bridge you need to connect RS422 or RS485 serial devices to a USB-enabled computer. Built for professionals who demand reliability in industrial, laboratory, or field environments, this adapter delivers stable serial communications without sacrificing convenience. Its compact, robust design houses a 9-pin DB9 male serial connector and a long, flexible 6-foot cable, making it easy to reach devices that are tucked away or spread across a workspace. Whether you’re integrating legacy equipment, collecting sensor data, or controlling remote equipment, this USB-to-serial solution provides a seamless, ready-to-use interface that minimizes setup time and maximizes performance.

With RS422 and RS485 support, the adapter accommodates a wide range of serial devices—allowing differential signaling for longer cable runs and improved noise immunity. The DB9 male connector ensures compatibility with many existing serial devices and equipment that still rely on this widely adopted interface. The combination of USB connectivity and differential serial signaling makes this adapter ideal for data loggers, PLCs, CNC machines, measurement equipment, and other devices that require robust, low-latency serial communication. The COM Retention feature is a standout benefit, keeping your software configuration intact even when the adapter is unplugged and reconnected, which reduces downtime and eliminates the need to reconfigure ports after every reconnect.

Designed to be practical in real-world setups, the 6-foot cable length provides generous reach while keeping the footprint compact enough for crowded desktops, machine panels, or equipment racks. The unit is USB-powered, so there’s no extra power brick to manage, and it supports convenient plug-and-play installation on many operating systems. When you require a reliable connection for serial devices over USB, this StarTech adapter delivers predictable performance and steady COM port behavior, helping you maintain consistent control and data exchange across your applications.

In addition to its core capabilities, this adapter emphasizes ease of use and long-term value. The durable construction and straightforward interface minimize the technical overhead often associated with serial communications. It’s a versatile tool for developers, technicians, and engineers who need a dependable solution for connecting RS422/RS485 devices to modern computers. By consolidating the complexity of translating USB to serial into a single, well-supported device, StarTech makes it simpler to modernize setups that still rely on proven serial devices. The result is a flexible, future-proof option that reduces integration friction while preserving the performance benefits of RS422/RS485 signaling.

  • RS422 and RS485 support for flexible serial communication in noisy environments and for longer cable runs
  • 6-foot USB cable provides ample reach to connect devices across desks, benches, or equipment racks
  • 9-pin DB9 male serial connector for compatibility with a wide range of legacy and modern serial devices
  • COM Port Retention ensures stable, persistent COM port assignments across reconnects
  • Compact, durable USB-to-serial adapter with plug-and-play capabilities and broad OS driver support

Technical Details of StarTech.com 6ft RS422/485 USB Serial Adapter with COM Retention

  • Interface: USB to RS422/RS485 serial adapter
  • Connector: 9-pin DB9 male serial port
  • Cable length: 6 feet (approx. 1.8 meters)
  • Signal support: RS422 and RS485 differential signaling
  • COM Port Retention: maintains consistent COM port assignments across reconnects
  • Power: USB-powered bus-powered device
  • Driver compatibility: supports Windows, macOS, and Linux with available drivers
  • Physical build: compact, durable form factor suitable for desktop use and industrial environments

How to install StarTech.com 6ft RS422/RS485 USB Serial Adapter w/ COM Retention

  • Step 1: Plug the USB connector into an available USB port on your computer. The device should begin enumeration automatically on many systems.
  • Step 2: Connect your RS422/RS485 device to the DB9 male connector in the correct wiring configuration as specified by your device's documentation.
  • Step 3: If prompted, install the latest drivers from StarTech’s official website or allow the operating system to install the generic USB-serial drivers. Driver availability covers Windows, macOS, and Linux platforms.
  • Step 4: Verify that a new COM port has been assigned by checking your system’s device manager (Windows) or the equivalent serial port listing on macOS/Linux. The COM Port Retention feature will help maintain a stable port name across reconnections.
  • Step 5: Configure your serial communication program to use the COM port assigned to the adapter, set the appropriate baud rate, parity, stop bits, and flow control as required by your RS422/RS485 device.

Frequently asked questions

  • Q: What is COM Port Retention? A: COM Port Retention keeps the COM port assignment consistent for the USB-to-Serial adapter across disconnects and reconnects, reducing reconfiguration in software that relies on fixed port names.
  • Q: Can I use this adapter with both RS422 and RS485 devices? A: Yes. The adapter supports both RS422 and RS485 signaling, giving you flexibility to connect to a variety of serial devices and networks.
  • Q: What is the length of the included cable? A: The adapter ships with a 6-foot USB cable, providing ample reach for most workstation or equipment layouts.
  • Q: Is the adapter powered by USB? A: Yes. It is a bus-powered USB device, requiring no external power supply for typical use.
  • Q: Which operating systems are supported? A: StarTech provides drivers and compatibility for Windows, macOS, and Linux, ensuring broad cross-platform support for this USB-to-serial solution.
  • Q: Do I need professional installation to use this adapter? A: Most users can install and configure the device with basic driver updates and simple serial port settings. The process is designed to be straightforward and plug-and-play on supported systems.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 30778122203

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4.4 ★★★★★
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Dick
Lowell, US
★★★★★ 4
Good but more academic
Format: Hardcover
I love Brant Pitre, especially his books Jesus and the Jewish Roots of the Eucharist and Jesus the Bridegroom. I would say those books should be required reading for anyone who is catechist or is involved in RCIA as Catholics. This book is good, however it is primarily an academic work where Dr. Pitre takes on the Historical Jesus movement and Dr. Bart Ehrman in particular. In this book he goes on to show that the gospels were written within a few decades of Jesus death by the disciples that have given their names to the gospels. He uses his knowledge of Jewish faith and culture to show that Jesus really does claim to be God in all the gospels, not just the Gospel of John. It is a good book but not one that I would find useful on a regular basis.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2016
R
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Russell P. Hills
Dallas, US
★★★★★ 5
BEST BOOK IN 20 YEARS
Format: Hardcover
BEST BOOK that I have read in 20 years. This should be required reading in Christian schools. Every Christian who has graduated from high school should read this book. As one who has studied Church History, Hebrew, Aramaic and Greek myself, I had become very disappointed in what passes as scholarship, even among Ivy Leage graduates, in the 21st century. HOWEVER, Dr. Pitre's book is a great encouragement that there really are people "out-there" that display genuine scholarship. With Appreciation, Russ Hills, Ph.D.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
A
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A
Omaha, US
★★★★★ 5
A Case for Jesus' Divine Self-Conception
Format: Kindle
This is a very meticulously reasoned argument attempting to show that Jesus had a Divine self-conception. That is, Jesus believed, and claimed, that he was God. Pitre begins by posing C.S. Lewis’ famous “trilemma” to the reader. If Jesus claimed to be God, we have three ways to respond – he was either a Liar, Lunatic, or Lord. Pitre’s work in this book strives to bring us back, face to face, with this trilemma. To accomplish this, Pitre needs to defeat another popular notion in the modern mind – that Jesus, or at least much of the Gospel material about him, was a “Legend.” If Pitre can show that Jesus did, in fact, historically claim Divinity, we will be forced to respond to his claim and answer Jesus’ own question for ourselves – “Who do you say that I am?” To accomplish this Pitre first attempts to show that the Gospels are historically reliable. He believes that, contrary to modern scholarly opinion, the Gospels were indeed written by the authors they have been attributed to (Matthew, Mark, Luke, and John), that they were intended to portray historically accurate biographical pictures of Jesus, and that they were written much more closely to the time of Jesus than liberal scholars assume (Pitre tentatively dates the synoptic Gospels all before the destruction of the Temple in AD 70). These three pieces of evidence – authorship, intent, and dating – all lead Pitre to the conclusion that the Gospels give us historically accurate information about Jesus. After setting the stage by arguing for the accuracy of our sources, Pitre delves into the synoptic Gospels (Matthew, Mark, and Luke) and tries to show that although it is not always explicit (i.e. Jesus doesn’t say “I am God, worship Me.”) even the synoptics portray Jesus as claiming Divinity. Using evidence such as Jesus’ use of the titles “Son of Man” and “I Am,” prophesy from the book of Daniel, Jesus’ “stilling of the storm,” the transfiguration, the pronouncement of the forgiveness of the parlytic’s sins, the riddle about the Son of David being David’s “Lord,”, the crucifixion, and the resurrection, Pitre makes his case. In the end, he believes that not only do the Gospel authors portray Jesus as Divine, but that these claims came from Jesus himself. Thus we are led, full circle, back to the trilemma. We can call Jesus Liar, Lunatic, or Lord, but not, according to Pitre, a Legend. This was a really interesting read from a conservative scholar. His exegesis of many Gospel passages illuminate how the Hebrew Scriptures provide a much needed backdrop for understanding each story. The Gospels are much more nuanced than we might first think and oftentimes one saying or image may evoke whole passages or concepts from the Old Testament that would have been apparent to early Jewish readers. As Pitre argues, understanding the Jewish context of the synoptic authors helps in understanding their Christology. In the end, I agree with Pitre that the Gospels are generally more historically accurate than “mainstream” scholars give them credit for. I think it’s plausible that the Gospel titles reveal their true authors and that they were written fairly early after Jesus’ death (before the fall of Jerusalem). I also agree that the Synoptics may implicitly ascribe Divinity to Jesus – although I don’t think that is an open and shut case. If there were more explicit cases in the synoptic Gospels where Jesus claimed Divinity, it would help his case. It still seems to me the only explicit sayings we have come from the Gospel of John, which even Pitre doesn’t seem to argue is historically reliable (at least he doesn’t focus on this in the book). It’s probably outside the scope of this book, but I would have loved to see Pitre address the idea of Jesus as Apocalyptic Prophet. He interacts with several scholars who accept this notion (EP Sanders, Dale Allison, Bart Ehrman, John Meier) and it’s a viable option in the world of Historical Jesus scholarship. I think it’s a relevant topic in all discussions surrounding a Historical Jesus and can be a large factor in how one answers the question of Jesus’ identity. This study is worth reading regardless of your theological persuasion, and Pitre’s arguments deserve serious consideration.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2016
S
Verified Purchase
ShopWeez
Natrona Heights, US
★★★★★ 5
Relief for dry mouth without gum irritation
Big improvement for users with sensitive gums. These relieve dry mouth during the night almost as well as the regular tabs. Some complained about a residual gel left on the gums. 🙄Just wipe it off. It’s a small thing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
B
Verified Purchase
Bronx Mike
Lake Worth, US
★★★★★ 5
An easy fix for dry mouth
Excellent for dry mouth.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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