---
product_id: 727019347
title: "DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices"
brand: "dtech"
price: "€ 0.42"
currency: EUR
in_stock: false
url: https://www.desertcart.fi/products/727019347-dtech-db9-to-rj45-serial-adapter-rs232-female-to-rj
store_origin: FI
region: Finland
---

# Extends RS232 signals up to 65 feet DB9 female to RJ45 female adapter Thumbscrew for secure, stable connection DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices

**Brand:** dtech
**Price:** € 0.42
**Availability:** ❌ Out of Stock

## Summary

> 🔗 Unlock your legacy devices with modern cabling — stay connected, stay ahead!

## Quick Answers

- **What is this?** DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices by dtech
- **How much does it cost?** € 0.42 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/727019347-dtech-db9-to-rj45-serial-adapter-rs232-female-to-rj)

## Best For

- dtech enthusiasts

## Why This Product

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

## Key Features

- • **Compact & Lightweight:** Matte finish, ultra-light 9g design fits anywhere without bulk
- • **Universal Compatibility:** Works flawlessly with laptops, printers, modems, POS, CNC tools & more
- • **Secure & Stable Connection:** Built-in thumbscrew ensures your connection stays locked in place
- • **Seamless Serial Data Bridge:** Effortlessly connect RS232 devices using affordable Cat5/Cat6 cables
- • **Extended Reach, No Compromise:** Transmit serial signals up to 65 feet without signal loss

## Overview

The DTECH DB9 to RJ45 Serial Adapter converts a standard 9-pin RS232 female connector to an RJ45 female port, enabling serial data transmission over cost-effective Cat5 or Cat6 cables. Supporting up to 65 feet of signal extension, it’s ideal for connecting laptops, printers, modems, POS systems, CNC machines, and barcode scanners. Featuring a secure thumbscrew design and a compact matte finish, this adapter offers a reliable, professional-grade solution for extending serial communication in modern workspaces.

## Description

Connector A: DB9 9 pin female Connector B: RJ45 8 Pin Female Data cable transmission signal up to 20m Compatible with standard 9-pin D-sub RS-232 devices Computer Laptops, Printers, Modems, Routers, PDAs, POS Devices, Digital CNC Machine Tools, Barcode Scanners etc. Please note: DB9 Serial RJ45 Adapter is only an adapter to extend RS232 serial data (max. 65 feet). This is not a console adapter. Usually this adapter should be used in pairs. DB9 serial data is transmitted via network cable. To use this adapter pair you will need to connect with cat5e or CAT6 cable. Package Includes: 1 x DB9 Female to RJ45 Female Serial Adapter

## Features

- A simple and cost effective solution for handling serial data communication between RS232 COM port devices using cheap cat5 cat6 RJ45 network cable
- DB9 female to RJ45 modular adapter converts DB9 female connector to RJ45 female connector (DB9 female to RJ45 female pin out: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x)
- The pair of DB9 to RJ45 socket couplers can extend RS232 serial signals up to 65 feet with an extender
- The bi-directional DB-9 female to RJ-45 female converter has a thumbscrew for easy and secure connection
- (Please note that this is not a 15-pin VGA video port. Compatible with standard 9-pin D-sub RS-232 devices. For example, computer laptops, printers, modems, routers, PDAs, POS devices, digital CNC machine tools, barcode scanners etc

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Connector Gender | Female-to-Female |
| Compatible Devices | Laptop |
| Color Name | Serial |
| Finish Type | Matte |
| Batteries Included | No |
| Batteries Required | No |
| Brand | DTECH |
| Manufacturer | guangzhouditedianzikejiyouxiangongsi |
| Item Model Number | CB0241 |
| Size | DB9 female to RJ45 |
| Package Dimensions | 7.19 x 5.89 x 2.9 cm; 9 g |
| Item Weight | 0.01 Kilograms |

## Product Details

- **Compatible Devices:** Laptop
- **Specific Uses For Product:** PC
- **Connector Type:** RJ45, VGA
- **Color:** Serial
- **Brand:** DTECH

## Images

![DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices - Image 1](https://m.media-amazon.com/images/I/519pJPO8fuL.jpg)
![DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices - Image 2](https://m.media-amazon.com/images/I/61hTDgVwKQL.jpg)
![DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices - Image 3](https://m.media-amazon.com/images/I/610me4+RGkL.jpg)
![DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices - Image 4](https://m.media-amazon.com/images/I/519Ag-PX1gL.jpg)
![DTECH DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter for Standard 9 Pin RS-232 Devices - Image 5](https://m.media-amazon.com/images/I/51rw+M-JyEL.jpg)

## Questions & Answers

**Q: Despite product title, this is not an "Ethernet Converter", is it? It just uses ethernet cable?**
A: Hi, DB9 to RJ45 adapter is used to process serial data communication between RS232 port devices over an inexpensive Ethernet cable, not to process Ethernet connection for internet signal.

**Q: Is the listed pinout correct for this product?**
A: Hello, this 9 pin to ethernet adapter's pinout is 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x (straight through connector, please check the updated pinout picture)

**Q: Can this be used with a USB-to-RJ45 console/rollover cable to connect to DB9 console porton a switch or router?**
A: Hi, this straight through DB9 to RJ45 connector should work for your situation. If not, please feel free to contact us via the order page's "contact seller" for a return.

**Q: are these crossover (null modem) connectors or straight through?**
A: Hi, these are straight through DB9 to RJ45 connectors.

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**Shop now:** [https://www.desertcart.fi/products/727019347-dtech-db9-to-rj45-serial-adapter-rs232-female-to-rj](https://www.desertcart.fi/products/727019347-dtech-db9-to-rj45-serial-adapter-rs232-female-to-rj)

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-15*