

TRENDnet TU-S9, USB to Serial Converter
Key item features
- USB Compatibility: The USB to serial adapter supports USB 1.1 and is compatible with USB 2.0 and USB 3.0 ports.
- RS-232 Connection: Connect RS-232 serial devices, such as modems or printers, using the widely supported USB standard found in most laptops and desktops today.
- Operating Systems: Compatible with Windows 10, 8.1, 8, 7, and Mac OS 10.11 to 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 into your computer.
Specs
- Connector typeUSB Type A
- Cable length0 ft
- BrandTRENDnet
- ColorBlack
- Compatible brandsWindows
- Model nameTU-S9
- Free shipping
Free 30-day returns
How do you want your item?
More seller options (1)
About this item
Product details
- USB: The USB to serial adapter supports USB 1.1 and it is compatible with USB 2.0 and USB 3.0 ports with a 6Mbps Data Rate
- 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
Specifications
Connector type
Cable length
Brand
Color
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
Compare with similar items
| Product | Viewing this itemTRENDnet TU-S9, USB to Serial Converter ![]() $12.99 current price $12.9954 out of 5 Stars. 5 reviews | Open Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m) ![]() Now $6.00 current price Now $6.00, Was $8.00$8.00 15 out of 5 Stars. 1 reviews | Yammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard ![]() $11.45 current price $11.45 | SEWCHICS Usb Adapter Cable Black 3Pcs 10.8In ![]() $11.26 current price $11.26 | Necvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections ![]() Now $7.27 current price Now $7.27, Was $8.10$8.10 | onn 4 in 1 Camera Cable ![]() $11.96 current price $11.96294.8 out of 5 Stars. 29 reviews | USB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter ![]() $14.71 current price $14.71 |
|---|
| Connector type | USB Type ATRENDnet TU-S9, USB to Serial Converter | USB-COpen Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m) | -Yammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard | Micro-USBSEWCHICS Usb Adapter Cable Black 3Pcs 10.8In | USB1x USB power adapter cable-Black | USBNecvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections | USB Type Conn 4 in 1 Camera Cable | USB to RS485USB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter |
|---|---|---|---|---|---|---|---|---|
| Cable length | 0 ftTRENDnet TU-S9, USB to Serial Converter | 3.3 ftOpen Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m) | 5.9 inYammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard | 10.81 inSEWCHICS Usb Adapter Cable Black 3Pcs 10.8In | -1x USB power adapter cable-Black | 47.24 inNecvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections | 4 ftonn 4 in 1 Camera Cable | 27.56 inUSB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter |
| Color | BlackTRENDnet TU-S9, USB to Serial Converter | WhiteOpen Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m) | -Yammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard | BlackSEWCHICS Usb Adapter Cable Black 3Pcs 10.8In | Black1x USB power adapter cable-Black | 50cmNecvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections | Graystoneonn 4 in 1 Camera Cable | Silver & BlackUSB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter |
| Compatible brands | WindowsTRENDnet TU-S9, USB to Serial Converter | CanonOpen Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m) | -Yammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard | UnbrandedSEWCHICS Usb Adapter Cable Black 3Pcs 10.8In | VX1x USB power adapter cable-Black | -Necvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections | Aioneus/MAGIC JOHNonn 4 in 1 Camera Cable | -USB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter |
Similar items you might like
Based on what customers bought
Open Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m) $6.00 Was $8.00
Now$600current price Now $6.00, Was $8.00$8.00Open Box Apple MYQT3AM/A 240W USB-C Charge Cable (2m)
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysUSB to RS232 Serial Adapter Converters Cable Compatible for Multiple Devices $8.40
$840current price $8.40+$1.49 shippingUSB to RS232 Serial Adapter Converters Cable Compatible for Multiple Devices
Shipping, arrives in 3+ daysYammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard $11.45
$1145current price $11.45Yammee USB3.0 Header Extension Cable, 19/20Pin 1 to 2 Splitter for Computer Mainboard
Shipping, arrives in 3+ daysSEWCHICS Usb Adapter Cable Black 3Pcs 10.8In $11.26
$1126current price $11.26SEWCHICS Usb Adapter Cable Black 3Pcs 10.8In
Shipping, arrives in 3+ days1x USB power adapter cable-Black $8.55
$855current price $8.551x USB power adapter cable-Black
Shipping, arrives in 3+ daysClearance Necvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections $7.27 Was $8.10
Clearance
3 optionsAvailable in additional 3 optionsNow$727current price Now $7.27, Was $8.10$8.10+$1.99 shippingNecvior USB Multiport Extension Cable USB Splitter Cable Add More Device Connections
Shipping, arrives in 3+ days90cm MicroUSB SynCharge Cable $10.55
$1055current price $10.5590cm MicroUSB SynCharge Cable
Shipping, arrives in 3+ daysReduced price Black USB To RS232 RS-232(DB9) Serial Cable Standard Adapter Converter For PC $7.55 Was $15.00
Reduced price
Now$755current price Now $7.55, Was $15.00$15.00+$1.00 shippingBlack USB To RS232 RS-232(DB9) Serial Cable Standard Adapter Converter For PC
Shipping, arrives in 3+ daysUSB to Midi Cable Adapter Converter for PC Computer Music Keyboard New $4.99
$499current price $4.99+$4.99 shippingUSB to Midi Cable Adapter Converter for PC Computer Music Keyboard New
Shipping, arrives in 3+ daysUSB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter $14.71
$1471current price $14.71+$2.50 shippingUSB2.0 to 485 Adapter Cable USB to RS485 Serial Port Device Converter
Shipping, arrives in 3+ daysBest seller onn 4 in 1 Camera Cable $11.96
Best seller
$1196current price $11.96onn 4 in 1 Camera Cable
294.8 out of 5 Stars. 29 reviewsSave withPickup todayDelivery todayShipping, arrives tomorrowBest seller Liquipel Powertek USB-A to Lightning Light-Up Cable - Black $9.88
$988current price $9.88Liquipel Powertek USB-A to Lightning Light-Up Cable - Black
934.7 out of 5 Stars. 93 reviewsSave withShipping, arrives in 3+ daysLiquipel Powertek Pastel Braided USB-A to Lightning - White $9.88
$988current price $9.88Liquipel Powertek Pastel Braided USB-A to Lightning - White
824.7 out of 5 Stars. 82 reviewsSave withShipping, arrives in 3+ daysZeiwohndc Usb 3.0 One To Two Extension Cable Usb Computer One To Two Power Splitter $10.57
$1057current price $10.57Zeiwohndc Usb 3.0 One To Two Extension Cable Usb Computer One To Two Power Splitter
Shipping, arrives in 3+ daysGJX Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter $9.99
$999current price $9.99GJX Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysClearance USB Data Cable for CB-USB7 FE-340/330/320/310/300/290/280/270/250/240 $7.62 Was $8.51
Clearance
2 optionsAvailable in additional 2 optionsNow$762current price Now $7.62, Was $8.51$8.51+$0.99 shippingOptions from $7.62 – $7.82USB Data Cable for CB-USB7 FE-340/330/320/310/300/290/280/270/250/240
Shipping, arrives in 3+ daysBest seller Liquipel Powertek USB-A to USB-C Twizzler Cable - Pink $9.88
$988current price $9.88Liquipel Powertek USB-A to USB-C Twizzler Cable - Pink
464.8 out of 5 Stars. 46 reviewsSave withPickup todayDelivery todayShipping, arrives tomorrowBest seller Liquipel Powertek USB-C to USB-C Light-Up Cable - Black $9.88
$988current price $9.88Liquipel Powertek USB-C to USB-C Light-Up Cable - Black
484.8 out of 5 Stars. 48 reviewsSave withShipping, arrives in 3+ daysBest seller Liquipel Powertek USB-A to USB-C Light-Up Cable - Black $9.88
$988current price $9.88Liquipel Powertek USB-A to USB-C Light-Up Cable - Black
554.8 out of 5 Stars. 55 reviewsSave withShipping, arrives in 3+ daysUSB to RS232 Serial 9 Pin COM Port DB9 Converter Cable Adapter for PC Computer,1# $11.21
$1121current price $11.21+$2.99 shippingUSB to RS232 Serial 9 Pin COM Port DB9 Converter Cable Adapter for PC Computer,1#
Shipping, arrives in 3+ days
Frequently bought together
TRENDnet TU-S9, USB to Serial Converter $12.99 $32.48/in

TRENDnet TU-S9, USB to Serial Converter
Best seller SPORTLINK Wall Mounted TV Cord Hider - Cable Management Kit Hides TV Wires Behind The Wall - White $19.99

SPORTLINK Wall Mounted TV Cord Hider - Cable Management Kit Hides TV Wires Behind The Wall - White
Best seller onn 5-Ports USB 3.0 Hub with SD and microSD Card Reader $19.66

onn 5-Ports USB 3.0 Hub with SD and microSD Card Reader
100+ bought since yesterday Hyper Tough 6-Outlet Indoor Power Strip, 8 ft Extension Cord, ETL Certified, White $9.97

Hyper Tough 6-Outlet Indoor Power Strip, 8 ft Extension Cord, ETL Certified, White
Popular items in this category
Best selling items that customers love
StarTech 3ft 1m USB to Serial Adapter Cable 1P3FFCBUSBSERIAL $49.76
$4976current price $49.76StarTech 3ft 1m USB to Serial Adapter Cable 1P3FFCBUSBSERIAL
Shipping, arrives in 3+ daysReadyWired USB Cable Cord for Canon Pixma TS202 Printer $9.99
$999current price $9.99ReadyWired USB Cable Cord for Canon Pixma TS202 Printer
34.7 out of 5 Stars. 3 reviewsShipping, arrives in 3+ daysBelkin 6-Foot USB Extension Cable (Male to Female) USB 1.0 - White $5.99 $5.99/lb
$599current price $5.99$5.99/lbBelkin 6-Foot USB Extension Cable (Male to Female) USB 1.0 - White
54.8 out of 5 Stars. 5 reviewsShipping, arrives in 3+ daysStarTech 3ft USB to DB9 Male RS232 to USB Converter Serial Cable 1P3FPUSBSERIAL $35.93
$3593current price $35.93StarTech 3ft USB to DB9 Male RS232 to USB Converter Serial Cable 1P3FPUSBSERIAL
Shipping, arrives in 3+ daysStarTech 6" USB 2.0 Extension Adapter Cable $5.30
$530current price $5.30StarTech 6" USB 2.0 Extension Adapter Cable
33.7 out of 5 Stars. 3 reviewsSave withShipping, arrives in 2 daysonn USB Type C 3 in 1 Adapter with 4 inch cable $35.48
$3548current price $35.48onn USB Type C 3 in 1 Adapter with 4 inch cable
1864.2 out of 5 Stars. 186 reviewsSave withMonoprice USB 2.0 Cable 1.5 feet USB Type A Male to USB Type A Male Cable with Gold Plated Connectors, Black $6.78
$678current price $6.78Monoprice USB 2.0 Cable 1.5 feet USB Type A Male to USB Type A Male Cable with Gold Plated Connectors, Black
394.1 out of 5 Stars. 39 reviewsShipping, arrives in 3+ daysQuikcell 10Ft USB-A to Micro-USB Cable - Black $5.99
$599current price $5.99Quikcell 10Ft USB-A to Micro-USB Cable - Black
73.4 out of 5 Stars. 7 reviewsShipping, arrives in 3+ days10 Foot USB 2.0 Type A Male to Type A Male Cable $6.99
$699current price $6.9910 Foot USB 2.0 Type A Male to Type A Male Cable
84.9 out of 5 Stars. 8 reviewsShipping, arrives in 3+ daysBest seller Mimifly USB 3.0 A Male to A Male Cable, 2-Pack, 2FT, 5Gbps Data Transfer, Compatible with Hard Drive, Printer, Black $11.99
Best seller
9 optionsAvailable in additional 9 optionsSponsored$1199current price $11.99More options from $11.04Mimifly USB 3.0 A Male to A Male Cable, 2-Pack, 2FT, 5Gbps Data Transfer, Compatible with Hard Drive, Printer, Black
1214.4 out of 5 Stars. 121 reviewsSave withShipping, arrives in 2 daysBest seller onn 4-in-1 USB Short Retractable Cable Adapter Kit, 3.2 ft, 6 Pieces $10.77
Best seller
$1077current price $10.77onn 4-in-1 USB Short Retractable Cable Adapter Kit, 3.2 ft, 6 Pieces
1503.9 out of 5 Stars. 150 reviewsSave withPickup todayDelivery todayShipping, arrives tomorrowBest seller onn 6ft Micro-USB to USB Braided Charging Cable, Black $4.88 Was $7.88
Best seller
Now$488current price Now $4.88, Was $7.88$7.88onn 6ft Micro-USB to USB Braided Charging Cable, Black
3884.4 out of 5 Stars. 388 reviewsSave withPickup todayDelivery todayShipping, arrives tomorrowStarTech USB32DPES2 USB 3.0 to DisplayPort Adapter $66.98
$6698current price $66.98StarTech USB32DPES2 USB 3.0 to DisplayPort Adapter
33.3 out of 5 Stars. 3 reviewsSave withShipping, arrives in 2 daysEcoSurvivor 8ft. USB Cable with Lightning™ Connector – 44849-TS1 $15.83
$1583current price $15.83EcoSurvivor 8ft. USB Cable with Lightning™ Connector – 44849-TS1
104.6 out of 5 Stars. 10 reviewsSave withShipping, arrives in 3+ daysBest seller onn 6' Braided USB Extension Cable, Black $9.93
Best seller
$993current price $9.93onn 6' Braided USB Extension Cable, Black
1644.7 out of 5 Stars. 164 reviewsSave withPickup todayDelivery todayShipping, arrives tomorrowUSB Extension Cable 3FT Male to Female Cord USB A Male to USB A Female $6.99
$699current price $6.99USB Extension Cable 3FT Male to Female Cord USB A Male to USB A Female
Shipping, arrives in 3+ daysBest seller onn 6" USB-C to HDMI Adapter $14.88
Best seller
$1488current price $14.88onn 6" USB-C to HDMI Adapter
153.6 out of 5 Stars. 15 reviewsSave withShipping, arrives tomorrow
Customer ratings & reviews
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Showing 1-3 of 5 reviews
Verified Purchase
Works as advertised.
I didn't think this device would work because I needed it for a very old serial application, but it actually works perfectly.
worked great
When I switched my OS to win 7 64 bit none of the old converters would work because no one supports the 64 bit software. This converter worked without a hitch after downloading the upgraded drivers. I was back on the air in minutes.
Works, but has a major bug
This item works well, but has a major glitch that might throw folks into a tizzy. For some reason, at 9600 baud, selecting 2 stop bits corrupts the incoming data. Even if I echo back one character at a time, from a terminal window, it loses framing and receives the bits apparently at a different baud rate. The fix is to obviously stick to one stop bit, and hope you don't need two -- ever. I hav verified that the data is actually being transmitted properly. The glitch is in the receiver. DON'T USE TWO STOP BITS.
Check out these related products
TRENDnet TU-S910, 10 Ft. USB to Serial Converter $16.99
$1699current price $16.99+$6.99 shippingTRENDnet TU-S910, 10 Ft. USB to Serial Converter
Shipping, arrives in 3+ daysJ5create USB Type-C to VGA Adapter Silver - JCA111 $16.99
$1699current price $16.99J5create USB Type-C to VGA Adapter Silver - JCA111
Shipping, arrives in 3+ daysaxGear Vertical USB 3.1 Front Panel Socket Key-A Type-E to USB 3.0 20Pin Header Adapter $10.99
$1099current price $10.99axGear Vertical USB 3.1 Front Panel Socket Key-A Type-E to USB 3.0 20Pin Header Adapter
Save withShipping, arrives in 2 daysSyba USB Type-C to Female VGA Converter Cable Adapter for Laptops Macbook Chromebook $23.35 $23.35/lb
$2335current price $23.35$23.35/lbSyba USB Type-C to Female VGA Converter Cable Adapter for Laptops Macbook Chromebook
Shipping, arrives in 3+ days17 cm USB 3.1 Type Male to USB 3.0 Female Adapter Cable, Black $23.69
$2369current price $23.6917 cm USB 3.1 Type Male to USB 3.0 Female Adapter Cable, Black
Shipping, arrives in 3+ days3 ft. USB-C to USB-C Cable M&M 1m USB 3.0, 5 Gbps $22.69 Was $25.69
Now$2269current price Now $22.69, Was $25.69$25.69+$9.98 shipping3 ft. USB-C to USB-C Cable M&M 1m USB 3.0, 5 Gbps
Shipping, arrives in 3+ days




























