---
product_id: 436876
title: "TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9"
brand: "trendnet"
price: "EC$77"
currency: XCD
in_stock: true
category: "Tren Dnet"
url: https://grenada.desertcart.com/products/436876-trendnet-usb-to-serial-9-pin-converter-cable-tu-s9
store_origin: GD
region: Grenada
---

# Flexible 21-inch cable for versatile setups 6Mbps USB 1.1/2.0/3.0 compatible NDAA compliant for secure government use TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9

**Brand:** trendnet
**Price:** EC$77
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect with confidence — the ultimate USB to serial bridge for pros who demand more.

## Quick Answers

- **What is this?** TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9 by trendnet
- **How much does it cost?** EC$77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [grenada.desertcart.com](https://grenada.desertcart.com/products/436876-trendnet-usb-to-serial-9-pin-converter-cable-tu-s9)

## Best For

- trendnet enthusiasts

## Why This Product

- Trusted trendnet brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Installation:** Get up and running in seconds with simple plug-and-play setup and included driver CD.
- • **Universal Device Support:** Connect modems, printers, POS systems, and more across Windows and Mac OS platforms.
- • **Government-Grade Security:** NDAA compliance ensures your networking solutions meet strict U.S. and Canada government standards.
- • **Seamless USB Compatibility:** Plug into USB 1.1, 2.0, or 3.0 ports with blazing 6Mbps data transfer speeds.
- • **Trusted Reliability & Support:** Backed by 2 years of TRENDnet protection and expert English-speaking tech support.

## Overview

The TRENDnet TU-S9 USB to Serial 9-Pin Converter Cable delivers reliable 6Mbps data transfer across USB 1.1, 2.0, and 3.0 ports. NDAA compliant for government-grade security, it supports a wide range of serial devices on Windows and Mac OS. Featuring a flexible 21-inch cable and backed by 2 years of manufacturer protection, this adapter ensures seamless connectivity and peace of mind for professional setups.

## 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. USBSupports USB 1.1 and compatible with USB 2.0 and USB 3.0 ports.RS-232 Serial ConnectorConnect RS-232 serial devices such as modems and network switches using the widely supported USB standard found in most laptops and desktops today.Flexible CableIntegrated flexible 540 mm (21 in.) USB cable accommodates most installation scenarios. PACKAGE CONTENTS• TU-S9• Quick Installation Guide• CD-ROM (Drivers)

## Features

- 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
- NDAA COMPLIANT: With our NDAA compliant USB to Serial 9-Pin Converter Cable, you can plan and install networking solutions that Government customers demand today (U.S. and Canada Only)
- MANUFACTURER PROTECTION: We stand by the quality of our products.The TU-S9 USB to Serial 9-Pin Converter Cable is backed and supported with 2 years of TRENDnet Manufacturer Protection.
- RELIABLE TECH SUPPORT: Our team of advisors, support and tech experts are English speaking, and available for all your needs during normal business hours. We take pride in being there for our customers.
- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0007T27H8 |
| Best Sellers Rank | #20 in Serial Cables |
| Brand | TRENDnet |
| Built-In Media | CD-ROM (Driver and User’s Guide), Quick Installation Guide, TU-S9 |
| Color | White |
| Compatible Devices | Gateways, Laptop, Modems, PLC controllers, POS systems, Printer |
| Connector Type | USB Type A |
| Customer Reviews | 4.6 out of 5 stars 3,203 Reviews |
| External Testing Certification | CE, FCC |
| Finish | White |
| Global Trade Identification Number | 00710931303209 |
| Input Voltage | 5 volts_of_direct_current |
| Item Dimensions | 2.56 x 1.38 x 0.39 inches |
| Item Weight | 40 g |
| Item dimensions L x W x H | 2.56 x 1.38 x 0.39 inches |
| Manufacturer | TRENDnet |
| Mfr 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 |
| Specific Uses For Product | Serial Devices |
| UPC | 710931303209 |
| Unit Count | 1 Count |
| Warranty Description | 2 year |

## Product Details

- **Color:** White
- **Compatible Devices:** Gateways, Laptop, Modems, PLC controllers, POS systems, Printer
- **Connector Type:** USB Type A
- **Item dimensions L x W x H:** 2.56 x 1.38 x 0.39 inches
- **Specific Uses For Product:** Serial Devices

## Images

![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9 - Image 1](https://m.media-amazon.com/images/I/51vgKmQZPJL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9 - Image 2](https://m.media-amazon.com/images/I/61eaAA+5ftL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9 - Image 3](https://m.media-amazon.com/images/I/61d74yD20OL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9 - Image 4](https://m.media-amazon.com/images/I/61UWZ8PhCZL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9 - Image 5](https://m.media-amazon.com/images/I/61QSkIYUlEL.jpg)

## Questions & Answers

**Q: will this connector work for my royal cash register? I have bought scanners for the register, but wonder if the USB scanners may last longer.**
A: This is a serial to USB converter, not vice-versa. If your scanner has a USB connection already, then this item is of no use to you. By the way, less and less laptops (and I would assume desktops) come equipped with a COM port (that is why I needed this converter), so opting your USB port for a COM port sounds more of an own goal. Perhaps I misunderstood your question.

**Q: is it prolific**
A: Prolific chips often exhibits erratic behavior with some serial devices.  The reliable chip is the FTDI chip.

**Q: Will this work to connect a computer to a CISCO Switch via the console cable?**
A: Yesssss its a great usb to serial cable

**Q: I assume this will plug and play with WIN10 64x ...? thanks!**
A: It is just a cable so I would assume so.  My husband uses it with his Windows 10 laptop to connect to his telescope.

## Frequently Bought Together

- TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, USB 1.1, USB 2.0, USB 3.0, 64cm (25 in.) Cable Length, Plug & Play, White
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*Product available on Desertcart Grenada*
*Store origin: GD*
*Last updated: 2026-10-19*