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TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length, Plug & Play, White, TU-S9

4.5 4.5 out of 5 stars 3,103 ratings

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USB to Serial | 2ft

Purchase options and add-ons

Compatible Devices Laptop
Specific Uses For Product personal
Connector Type USB Type A
Color White
Item Dimensions LxWxH 2.05 x 1.38 x 0.59 inches

About this item

  • USB: The USB to serial adapter supports USB 1.1 and it is compatible with USB 2.0 and USB 3.0 ports.
  • RS-232 SERIAL CONNECTOR: Connect RS-232 serial devices, such as modems or printers, using the widely supported USB standard found in most laptops and desktops today.
  • SUPPORTED OPERATING SYSTEMS: The USB to serial converter adapter is compatible with Windows and Mac operating systems. Windows 10, 8.1, 8, 7. Mac OS 10.11, 10.10, 10.9, 10.8, 10.7, 10.6
  • FLEXIBLE CABLE: Integrated and flexible 540mm (21 in.) USB 2.0 cable accommodates most installation scenarios. Total cable length of 25 inches when including the RS-232 (9pin) and USB Type A.
  • EASY SETUP: Simple installation in seconds of the USB to Serial 9-Pin Converter Cable. Insert the your computer
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Important information

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no international orders please

Visible screen diagonal

19" / 49 cm

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This Item
TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length, Plug & Play, White, TU-S9
TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length, Plug & Play, White, TU-S9
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Price$11.99$32.46-20% $39.44
List:$49.60
$9.99-31% $10.99
List:$15.99
$14.99
Delivery
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Customer Ratings
Value for money
4.6
4.6
4.4
4.4
4.1
4.2
Easy to install
4.8
4.9
4.5
4.2
4.3
Quality of material
4.6
4.7
4.5
4.3
4.4
Tech Support
4.2
4.9
4.0
3.8
3.7
Durability
4.6
4.8
4.3
4.1
Sold By
Amazon.com
Amazon.com
Amazon.com
BenfeiDirect
CableCreation
Oikwan
connector type
USB Type A
Serial/USB
usb
DB9
USB 2.0
RJ45, USB Type C
number of ports
3
1
1
0
2
1
current rating
256 amps
1 amps
1 amps
power plug type
no plug
no plug
no plug
warranty
Lifetime
Limited
Limited
Lifetime
Limited

From the manufacturer

TRENDnet
USB 1.1, USB 2.0, USB 3.0, RS-232, Serial, TxD, RxD, RTS, DCD, RI, GND, converter, adapter

Overview

USB 1.1, USB 2.0, USB 3.0, RS-232, Serial, TxD, RxD, RTS, DCD, RI, GND, converter, adapter

USB 1.1, USB 2.0, USB 3.0, RS-232, Serial, TxD, RxD, RTS, DCD, RI, GND, converter, adapter

USB 1.1, USB 2.0, USB 3.0, RS-232, Serial, TxD, RxD, RTS, DCD, RI, GND, converter, adapter

USB

Supports USB 1.1 and compatible with USB 2.0 and USB 3.0 ports.

RS-232 Serial Connector

Connect RS-232 serial devices such as modems and network switches using the widely supported USB standard found in most laptops and desktops today.

Flexible Cable

Integrated flexible 540 mm (21 in.) USB cable accommodates most installation scenarios.

USB to serial adapter, USB to serial converter, USB 1.1, USB 2.0, 3.0 compatible, RS-232, DB-9
USB to serial adapter, USB to serial converter, USB 1.1, USB 2.0, 3.0 compatible, RS-232, DB-9  USB, Centronics, Parallel, IEEE 1284, adapter, converter, printer TU-S9E TU-S4 TU-S910
TU-S9 TU-P1284 TU-S9E TU-S4 TU-S910
Customer Reviews
4.5 out of 5 stars
3,103
4.2 out of 5 stars
241
4.5 out of 5 stars
3,103
4.5 out of 5 stars
3,103
4.5 out of 5 stars
3,103
Standards 1 xUSB Type A • 1 x RS-232 (9-pin) male USB 1.1 Interface type A • IEEE 1284 centronics 36 male • 1 x 10/100Mbps port • 1 x RS-232 (9-pin) male • 4 x DB9 RS-232 male ports • 1 x USB 2.0 Type A port USB 1.1 ; 1 x USB Type A 1 x RS-232 (9-pin) male
Data Rate Up to 6 Mbps 12 Mbps • RS-232 port: Up to 921.6Kbps • Ethernet port: Up to 100Mbps Up to 460Kbps Up to 6Mbps
Supported OS Windows 10, 8.1, 8, 7 • Mac OS 10.11, 10.10, 10.9, 10.8, 10.7, 10.6 Windows 10, 8.1, 8, 7, Vista, XP • Mac OS 10.6-10.9 Windows ( Utility) Windows and Mac OS Windows 11, 10, 8.1, 8, 7;Mac OS 10.11, 10.10, 10.9, 10.8, 10.7, 10.6
Operating Temperature 0°C ~ 40°C (32°F ~ 104°F) 0°C ~ 40°C (32°F ~ 104°F) 0° – 40° C (32° – 104° F) 0° – 70° C (32° – 158° F) 0° – 40° C (32° – 104° F)
Operating Humidity Max. 85% non-condensing Max. 85% (non-condensing) Max. 95% non-condensing Max. 85% non-condensing Max. 85% non-condensing
Power Consumption 500 mA (max.) 500 mA (max) 1.1W (max) 0.6W (max) 500mA (max.)
Cable Length 540 mm (21 in) 2 m (6.6 ft.) - - 3m (10 ft.)
Weight 40 g (1.4 oz.) 105 g (3.7 oz.) • 102g (3.6 oz.) • 413g (14.5 oz.) 250g (8.82 oz.)

Product guides and documents

What's in the box

  • TU-S9
  • Quick Installation Guide
  • CD-ROM (Driver and User’s Guide)
  • Looking for specific info?

    Product information

    Feedback

    TRENDnet

    TRENDnet USB to Serial 9-Pin Converter Cable, Connect a RS-232 Serial Device to a USB 2.0 Port, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 21 Inch Cable Length, Plug & Play, White, TU-S9


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    Product Description

    This USB to Serial converter allows you to connect an RS-232 serial device such as a modem to a USB port on your desktop or laptop.

    USB
    Supports USB 1.1 and compatible with USB 2.0 and USB 3.0 ports.
    RS-232 Serial Connector
    Connect RS-232 serial devices such as modems and network switches using the widely supported USB standard found in most laptops and desktops today.
    Flexible Cable
    Integrated flexible 540 mm (21 in.) USB cable accommodates most installation scenarios.

    PACKAGE CONTENTS
    • TU-S9
    • Quick Installation Guide
    • CD-ROM (Drivers)

    Customer reviews

    4.5 out of 5 stars
    4.5 out of 5
    3,103 global ratings

    Customers say

    Customers like the performance, quality and ease of use of the adapter. For example, they mention it works flawlessly, is of reasonable quality and that it's easy to program uniden scanners. That said, opinions are mixed on the length, driver requirement, value, connectivity, and compatibility.

    AI-generated from the text of customer reviews

    822 customers mention671 positive151 negative

    Customers like the performance of the adapter. For example, they mention that it works flawlessly, it works perfectly to configure their network, and Fibre Channel switches, and that it even works well with a Windows 7-64 machine. The drivers from the CD and the adaptor worked perfectly, and the ones direct from Prolific are working great. The machine controls work right out of the box, and all control sequences work great.

    "...cables to connect to older machine controls, and they work right out of the box...." Read more

    "...Pros: Cheap, works fine when it works.Cons: Unhelpful support if it doesn't work, somewhat questionable future-proofing...." Read more

    "...I plugged my Uniden Scanner into the adapter and everything worked perfectly, right out of the box...." Read more

    "...I installed the windows seven drivers from the CD and the adapter worked perfectly. The CDR Tool immediately recognized the adapter as COM3...." Read more

    290 customers mention268 positive22 negative

    Customers are satisfied with the quality of the adapter. They mention that it is very good for the price, it is well constructed, and has high reliability. Some say that the price is relatively cheap.

    "...These Arduino products are great, very flexible, and relatively cheap. Programming software is free and the language used is more or less "C"...." Read more

    "...Pros: Cheap, works fine when it works.Cons: Unhelpful support if it doesn't work, somewhat questionable future-proofing...." Read more

    "...I just uboxed and tested it, but it looks just fine. Money well spent." Read more

    "...This one was very reasonably priced and another reviewer indicated it worked in the same application...." Read more

    177 customers mention177 positive0 negative

    Customers find the electronic adapter very simple to install and use. They mention that the driver installed very smoothly, and the Devise Manager identified the TU-S9. They also say that the cable comes with software that installed smoothly, with explicit instructions. Customers also mention that it's easy to go onto their website without providing any login, and that the converter will help them get set up.

    "...Programming software is free and the language used is more or less "C". Plenty of programming examples are in existence...." Read more

    "...The package info needs to be updated. The driver installed very smoothly and the Devise Manager identified the TU-S9...." Read more

    "...You don't have to manually install software, just plug-n-go. Windows will recognize the cable and install any necessary driver...." Read more

    "...The driver installation was very fast and completed without any problems...." Read more

    99 customers mention69 positive30 negative

    Customers are mixed about the length of the adapter. Some mention it's excellent, plenty long enough to be wrapped, and works well enough in a complex environment. Others say that it'd be better if the cable was a little longer and had better build quality.

    "...The scanner came with a serial cable but my laptop does not have one. To make things worse, I am using an Apple Macbook Pro...." Read more

    "...So, the cable works great on the latest PCs, but make sure the manufacturer of your serial device has working drivers for your PC's version of..." Read more

    "...The second problem is that it has captive nuts on the DB9 connector...." Read more

    "What I liked: - Long cable (21 inches without the connectors) - It just works (tested with Cisco PIX/ASA/Switch/Router)..." Read more

    76 customers mention53 positive23 negative

    Customers are mixed about the value of the adapter. Some mention it's low cost, one of the cheapest serial to USB adapters you can get that's a name brand, and a cost effective way of connecting RS232 devices to the computer. However, others say that it'd be a bit pricey for what it does, a total waste of money, and completely useless.

    "...That too was a very simple install and it is free. Just go to their web site, download and install." Read more

    "...Overall great product and great price!" Read more

    "...I noticed that this adaptor is more expensive than others. Although, I also noticed that the baud rate is much higher on this adaptor than on others...." Read more

    "...Kudos to TRENDnet for making such a great product at a great price!" Read more

    76 customers mention49 positive27 negative

    Customers are mixed about the driver requirement of the adapter. Some mention that it does not require any drivers or CDs, while others say that it requires a proprietary driver from the Trendnet website and a full system reboot.

    "...This cable comes with a driver CD and a simple set of instructions: 1)..." Read more

    "...The next stumbling block was that Hyperterminal was NOT installed on my ACER...." Read more

    "...No driver needed, just plugged it in, looked in device manager under ports, and there it was ready to go...." Read more

    "These converters work well and do not need a driver on Windows (either Windows has the driver or it grabs it automatically from update)...." Read more

    59 customers mention34 positive25 negative

    Customers are mixed about the connectivity of the adapter. Some mention that it connects with no issue, while others say that it won't work or that the cable to the adaptor head doesn't seem to be firmly connected.

    "...The PC connected to the GPS via COM4 and communicated with the GPS unit perfectly through the PC's USB port...." Read more

    "...Since neither one is male, they could not connect. The nuts would not even let the adapter plug touch the serial port on my device...." Read more

    "...product handles it like a champ...not a single hiccup, and always a rock-solid connection." Read more

    "...Oh and Ive also noticed at times the program wont connect to the scope until it has been alt/az aligned thru the hand control." Read more

    54 customers mention34 positive20 negative

    Customers are mixed about the compatibility of the adapter. Some mention that it was immediately recognized by Windows 8 and OSX, and is compatible with drivers across many operating systems. However, others say that the driver is never recognized, has some issues with coms, and causes BSOD issues.

    "...of VID_067B&PID_2303, which makes it compatible with drivers across many operating systems without having to resort to tweaks...." Read more

    "...This was the terminal one for me. The COM driver constantly caused BSOD issues when I was doing much of any virtual COM work...this was so frequent,..." Read more

    "...converter uses a genuine Prolific PL-2303 HXD chip and is fully supported on Windows 8 without any driver installation necessary...." Read more

    "...It was easy to install and will also run under Windows XP mode on Windows 7 virtual machine, you will need to use the driver CD as Windows 7 did not..." Read more

    Works great with dexdrive on Windows 10
    5 Stars
    Works great with dexdrive on Windows 10
    I bought this adapter for my dexdrive and it works great on windows 10, running the updated dexdrive software. I didn’t even have to use the install disk that comes with the cable as windows 10 automatically installed the proper drivers. For the price you can’t go wrong with this cable. Its a must have if you need to connect an older device to a newer computer!
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    Top reviews from the United States

    Reviewed in the United States on May 19, 2012
    Style: USB to Serial | 2ftVerified Purchase
    One person found this helpful
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    Reviewed in the United States on April 25, 2016
    Style: USB to Serial | 2ftVerified Purchase
    19 people found this helpful
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    Reviewed in the United States on June 1, 2022
    Style: USB to Serial | 2ftVerified Purchase
    Reviewed in the United States on January 31, 2011
    Style: USB to Serial | 2ftVerified Purchase

    Top reviews from other countries

    Translate all reviews to English
    XÓCHITL DOMÍNGUEZ
    5.0 out of 5 stars Excelente
    Reviewed in Mexico on March 6, 2022
    Style: USB to Serial | 2ftVerified Purchase
    Ravinder Sage
    5.0 out of 5 stars Good
    Reviewed in India on June 24, 2023
    Style: USB to Serial | 2ftVerified Purchase
    Client d'Amazon
    5.0 out of 5 stars Fonctionne bien
    Reviewed in France on October 20, 2022
    Style: USB to Serial | 2ftVerified Purchase
    elena r.
    5.0 out of 5 stars convertitore seriale funzionante si w10 pro
    Reviewed in Italy on February 8, 2018
    Style: USB to Serial | 2ftVerified Purchase
    5.0 out of 5 stars 望遠鏡との接続問題なし。純正品より安い
    Reviewed in Japan on December 15, 2016
    Style: USB to Serial | 2ftVerified Purchase