---
product_id: 241567114
title: "DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices"
brand: "dtech"
price: "¥2002"
currency: JPY
in_stock: true
reviews_count: 9
category: "Dtech"
url: https://www.desertcart.jp/products/241567114-db9-to-rj45-serial-adapter-rs232-female-to-rj-45
store_origin: JP
region: Japan
---

# Supports bi-directional serial data transmission Extends RS232 signals up to 65ft DB9 Female to RJ45 Female adapter DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices

**Brand:** dtech
**Price:** ¥2002
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect Classic Tech with Modern Ease — Never Miss a Signal!

## Quick Answers

- **What is this?** DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices by dtech
- **How much does it cost?** ¥2002 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/241567114-db9-to-rj45-serial-adapter-rs232-female-to-rj-45)

## 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

- • **Universal Compatibility:** Works flawlessly with laptops, printers, modems, routers, CNC machines, barcode scanners, and more.
- • **Plug-and-Play Simplicity:** No drivers or software needed — just connect and communicate instantly.
- • **Extend Your Reach Up to 65 Feet:** Use paired adapters with Cat5e/Cat6 cables to cover long distances without signal loss.
- • **Secure & Hassle-Free Connection:** Thumbscrews ensure a rock-solid, no-slip fit every time you plug in.
- • **Seamless Serial-to-Ethernet Bridge:** Convert your classic RS232 devices to modern RJ45 cabling effortlessly.

## Overview

The DTECH DB9 to RJ45 Serial Adapter is a compact, cost-effective solution designed to convert standard 9-pin RS232 serial connections into RJ45 Ethernet-compatible ports. Ideal for extending serial data communication up to 65 feet using affordable Cat5e or Cat6 cables, it supports bi-directional data flow and fits a wide range of professional devices including laptops, printers, modems, and industrial equipment. Featuring secure thumbscrew connectors, this adapter ensures reliable, plug-and-play connectivity for seamless integration into your tech setup.

## Description

Connector A: DB9 9 Pin Female Connector B: RJ45 8 Pin Female Data cabling transmission signal up to 20M Compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc. Please be Noted: DB9 serial RJ45 adapter is only an adapter for extending RS232 serial data (max. distance 65ft), not a console adapter. Usually this adapter needs to be used in pairs. DB9 serial data is transmitted over the network cable. To use this pair of adapters, you need to connect them with a cat5e or CAT6 cable. What’s Included 1x DB9 Female to RJ45 Female Serial Adapter

Review: Great Adapters - Work as a charm. Perfect fit.
Review: Works perfectly - Worked great for a what I needed it for. Wiring diagram was easy to understand.

## Features

- A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable
- DB9 female to RJ45 modular adapter converts DB9 female connector into an RJ45 female connector (DB9 female - RJ45 Female pinout: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x)
- A pair of DB9 to RJ45 socket coupler can be used a extender to extend rs232 serial signals up to 65ft
- Bi-directional DB-9 female to RJ-45 female converter comes with thumbscrews for easy and secure connection
- (Please be noted it's NOT 15 pin VGA video port) It's compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JLWRFH6 |
| Best Sellers Rank | #22 in Serial Adapters |
| Customer Reviews | 4.4 4.4 out of 5 stars (157) |
| Date First Available | September 21, 2020 |
| Department | boys |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.317 ounces |
| Item model number | CB0241 |
| Manufacturer | guangzhouditedianzikejiyouxiangongsi |
| Package Dimensions | 2.83 x 2.32 x 1.14 inches |

## Product Details

- **Brand:** DTECH
- **Color:** black
- **Compatible Devices:** Desktop
- **Connector Type:** RJ45
- **Specific Uses For Product:** PC

## Images

![DB9 to RJ45 Serial Adapter RS232 Female to RJ-45 Female Ethernet Converter Compatible with Standard 9 Pin RS-232 Devices - Image 1](https://m.media-amazon.com/images/I/519pJPO8fuL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Adapters
*by O***A on September 24, 2025*

Work as a charm. Perfect fit.

### ⭐⭐⭐⭐⭐ Works perfectly
*by T***N on July 29, 2025*

Worked great for a what I needed it for. Wiring diagram was easy to understand.

### ⭐⭐⭐⭐⭐ Helps in the battle between old and new technology.
*by Z***S on January 9, 2025*

Fir those whe refuse to throw out old gadgets, this is for you. Sometmes the new talks with the old, sometimes they don't

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-29*