---
product_id: 436876
title: "TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White"
brand: "trendnet"
price: "€ 27.51"
currency: EUR
in_stock: true
url: https://www.desertcart.es/products/436876-trendnet-usb-to-serial-9-pin-converter-cable-tu-s9
store_origin: ES
region: Spain
---

# USB 1.1/2.0/3.0 compatible Plug & Play on Windows & Mac NDAA compliant for secure govt use TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White

**Brand:** trendnet
**Price:** € 27.51
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect Like a Pro — Legacy Meets Modern with Zero Hassle

## Quick Answers

- **What is this?** TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White by trendnet
- **How much does it cost?** € 27.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/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 Plug & Play:** Instant installation with no drivers needed—get connected in seconds and stay productive.
- • **Compact & Flexible Design:** 25-inch total cable length with a flexible build fits perfectly in any workspace without clutter.
- • **Cross-Platform Powerhouse:** Supports Windows 7 through 10 and Mac OS 10.6 to 10.11, bridging legacy serial devices with modern systems.
- • **Government-Grade Security:** NDAA compliance ensures your setup meets strict U.S. and Canadian government standards—future-proof your network.
- • **Universal USB Compatibility:** Seamlessly connects with USB 1.1, 2.0, and 3.0 ports for ultimate device flexibility.

## Overview

The TRENDnet TU-S9 USB to Serial 9-Pin Converter Cable is a compact, NDAA-compliant adapter that bridges RS-232 serial devices with modern USB ports. Compatible across Windows and Mac platforms, it offers plug-and-play convenience with a flexible 25-inch cable, backed by 2 years of manufacturer protection and reliable tech support.

## 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.
- 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 |
|---------------|-------|
| Unit Count | 1 Converter |
| Number of Items | 1 |
| Item Weight | 40 Grams |
| Package Quantity | 1 |
| Item Dimensions | 2.05 x 1.38 x 0.59 inches |
| Finish Types | White |
| Color | White |
| Warranty Type | Extended |
| Power Plug | No Plug |
| Nominal Power | 2.5 Watts |
| Connector Type Used on Cable | USB Type A |
| Number of Ports | 3 |
| Compatible Devices | Laptop |
| Specific Uses For Product | personal |

## Product Details

- **Compatible Devices:** Laptop
- **Specific Uses For Product:** Serial Devices
- **Connector Type:** USB Type A
- **Color:** White
- **Item dimensions L x W x H:** 2.56 x 1.38 x 0.39 inches

## Images

![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White - Image 1](https://m.media-amazon.com/images/I/51vgKmQZPJL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White - Image 2](https://m.media-amazon.com/images/I/61JDtN89LnL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White - Image 3](https://m.media-amazon.com/images/I/61d74yD20OL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White - Image 4](https://m.media-amazon.com/images/I/61UWZ8PhCZL.jpg)
![TRENDnet USB to Serial 9-Pin Converter Cable, TU-S9, USB to RS232 Serial Adapter, Supports Windows & Mac, 64cm (25 in.) Cable Length, NDAA Compliant, Plug & Play, White - Image 5](https://m.media-amazon.com/images/I/61QSkIYUlEL.jpg)

## Available Options

This product comes in different **Size** options.

## 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 Spain*
*Store origin: ES*
*Last updated: 2026-01-22*