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The TRENDnet TU-S9 USB to Serial Converter is a compact, lightweight adapter that connects RS-232 serial devices like modems and network switches to any USB port. Supporting USB 1.1 through 3.0 and compatible with Windows and Mac OS, it offers quick plug-and-play installation and comes with a 2-year manufacturer warranty, making it an essential tool for professionals bridging legacy tech with modern systems.








| ASIN | B0007T27H8 |
| Box Contents | USB to Serial Converter |
| Brand | TRENDnet |
| Brand Name | TRENDnet |
| Colour | white |
| Compatible Devices | Desktop |
| Compatible devices | Desktop |
| Connector Type | usb |
| Connector type | usb |
| Customer Reviews | 4.5 out of 5 stars 3,085 Reviews |
| External Testing Certification | CE, FCC |
| Global Trade Identification Number | 00710931303209 |
| Input Voltage | 5 Volts (DC) |
| Item Dimensions | 6.5 x 3.5 x 1 centimetres |
| Item Weight | 40 Grams |
| Item dimensions L x W x H | 6.5 x 3.5 x 1 centimetres |
| Manufacturer | TRENDnet |
| Manufacturer Part Number | TU-S9 |
| Model Number | TU-S9 |
| Nominal Power | 2.5 Watts |
| Number of Items | 1 |
| Number of Ports | 3 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| Product Finish Type | Matte |
| Product Warranty | 3 Year Manufacturer |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specific Uses For Product | Business |
| Specific uses for product | Business |
| UPC | 710931303209 |
| Unit Count | 1.0 count |
| Warranty Type | manufacturer's warranty |
D**E
good USB to Serial cable
Have been using this Serial to USB device for a good few years now and has served me well . I think i recall once or twice having issues with the drivers over the 4 or 5 years but it was easily solved by going to the TRENDnet website and updating the drivers. no complaints and a solid product.
G**T
Works like a charm!
I purchased this cable to be used as an adapter to connect to my Cisco router I use for lab work via a RJ45-to-DB9 cable since there was no port on my Dell laptop to connect to.So far so good, cable seem's to be of good quality and works like a charm!
A**N
and you're good to go
Purchased as need to configure Cisco Network devices. Confirmed working on Windows 7 - 64 bit and Ubuntu 14.04 LTS 64-bit. For windows simply install the driver from the supplied Driver CD, check which COM number is allocated. For Ubuntu you may need to do a bit of googling to find out how to setup the usb to serial. Once you find the right guides, you will see it only takes 5 mins to setup, and you're good to go. Note, I needed to use minicom software to connect to devices, you just have to supply the correct settings i.e. ttyUSB0... for it to work. The important thing is this this cable contains a chip made by Prolific Technology, which Ubuntu does officially support. I have also purchased much much cheaper cables as spares from eb*y, but they only seam to work in Windows, and the quality of the cable is not as good. My advice is buy a better quality cable, it may seam more expensive, but the benefit is they are likely to be compatible with most OS's. Highly recommended.
R**Y
No problems
Works as expected
C**V
Excellent Product
Needed to connect a Meade ETX125 to a laptop with no Serial port only a USB. Plugged it in downloaded dll and it worked first time
A**R
Works better and simpler than expected.
Worked spledidly so far. After plugging in it pretends to be an actual COM port in the system's driver list, so applicaitons using COM ports can simply use it as if it was an actual piece of the computer's interior hardware.
M**T
Ahh windows 8, how clever of you to make me buy now things
Pesky chipset is almost exactly the same as the one I've had for years. Unfortunately all of those I bought previously have been rendered worse than useless (blue screens) by windows updates, thanks guys. Now I'm on windows 8, this is the only choice. Hurumph, not impressed with being forced to part with more money to get the same thing...clever though. One really annoying thing - the screwlocks don't come off, so I can't use it in a number of places I would have liked...
F**K
Works as expected
We use it for controlling a robot, it does the job it's supposed to, I haven't had the issues with drivers I sometimes get with these things.
A**N
Good active converter.
Using this to communicate with PIC micro-controllers using a CCS serial port monitor that is built into their compiler and it is working perfectly. Install the drivers and the program detects the comport properly. The only thing that I don't like about it is that it needs to install the drivers every time you plug it into a different usb port and each usb port is then a different comport, so if you switch usb ports remember to change the setting in you serial port monitor to make sure that you are reading the correct port. Other than that it is solid for a solid price.
X**Z
Excelente
Para el que puso que no sirve es porque no instaló los drivers que se requieren, a menos que tengas tu PC lista para su uso. Me sirvió muy bien, el precio es realmente nuevo ya que eso cuestan aquí con una calidad muchísimo menor.
R**O
Finalmente un adattatore di qualità
Dopo anni di continui problemi di connessione con il mio tornio Mazak, finalmente ho trovato questo adattatore che fa il suo dovere anche in ambienti industriali con interfacce che pretendono precisione nei livelli di tensione dei segnali. Il tutto ad un prezzo incredibilmente basso. Facile da installare, testato con WINDOWS 7 su notebook, collegato con CNC Mazak, Fanuc, Siemens, Heidenhain e Yasnac tutti senza problemi. Consigliatissimo!
C**N
Fonctionne parfaitement
Utilisé entre un vieux macbook et des serveur
G**N
Works Fine and a Problem Solver
I'm trying to get a 20 year old microcomputer back up again. It requires a serial terminal interface which I no longer have (because I stupidly gave away the VT100 type terminal I used to communicate with it). Rather than buy one that would be expensive and of little future use, I started looking for a more modern solution. Having been working in electronics for many years, I have learned that one can get lucky and everything works okay the first time. Failing that, troubleshooting digital hardware can be difficult and time consuming. As a learning experience with new hardware and to simplify getting the basic RS-232 communication link back up, I purchased an Arduino processor board and an RS-232 "shield" to go with it. The shield simply converts the digital levels from the Arduino to RS-232 levels. These Arduino products are great, very flexible, and relatively cheap. Programming software is free and the language used is more or less "C". Plenty of programming examples are in existence. So, I was able to get the Arduino's RS-232 output going (looping output data) which I first looked at with a scope. Next, I brought up an old tower PC running XP. I started using this computer because it had a DB-9 RS-232 port and a terminal program known as "Hyperterminal". After XP, Hyperterminal has to be purchased separately. Hooking up to the PC and Hyperterminal worked just fine. Next, I wanted to get rid of the tower PC and run things from a small ACER netbook portable. This is where the Trendnet product comes in since the ACER doesn't have a DB-9 port. I was hoping the driver for this device would install automatically but it didn't so I had to use the supplied CD. Since the ACER didn't have an internal CD drive, I hooked up and external one through a USB port and loaded the driver without incident. If you don't have an external drive, I imagine you could use another computer to load and then send the file over your LAN. The next stumbling block was that Hyperterminal was NOT installed on my ACER. Rather than try to figure out why, I looked on line and found another (free) terminal program called RealTerm. Hooking the Trendnet to the Arduino DB-9 and an ACER USB port worked fine. The only thing I noticed, which could be a problem for some, was that no "thumbscrews" were provided on the Trendnet DB-9 end. This end stays mated okay with the DB-9 end on the Arduino, but I don't particularly like to leave DB connectors unsecurred to each other. One could use a short jumper cable, but who needs extra work and cost. Over the years, I have purchased several other Trendnet products and found that they generally did what was advertised and were of good quality for the price.
Trustpilot
2 weeks ago
1 month ago