---
product_id: 50258218
title: "DB9 null modem male to female slimline data transfer serial port adapter 2 Pack"
brand: "arnorin"
price: "€ 15.94"
currency: EUR
in_stock: true
reviews_count: 13
category: "Arnorin"
url: https://www.desertcart.fr/products/50258218-db9-null-modem-male-to-female-slimline-data-transfer-serial
store_origin: FR
region: France
---

# DB9 slimline serial adapter Reversible screws for secure fit Full EMI shielding DB9 null modem male to female slimline data transfer serial port adapter 2 Pack

**Brand:** arnorin
**Price:** € 15.94
**Availability:** ✅ In Stock

## Summary

> 🔗 Connect legacy gear like a pro—no signal drop, no stress!

## Quick Answers

- **What is this?** DB9 null modem male to female slimline data transfer serial port adapter 2 Pack by arnorin
- **How much does it cost?** € 15.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/50258218-db9-null-modem-male-to-female-slimline-data-transfer-serial)

## Best For

- arnorin enthusiasts

## Why This Product

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

## Key Features

- • **Dual-Sided Screw Locking:** Reversible screws secure both ends, preventing accidental disconnections in critical environments.
- • **Two-Pack Value & Reliability:** Get double the connectivity with a trusted, top-ranked serial adapter loved by pros.
- • **Slimline Design for Tight Spaces:** Compact form factor reduces port strain and fits crowded setups seamlessly.
- • **Plug & Play Null Modem Conversion:** Effortlessly convert straight cables to null modem wiring—no tech hassle.
- • **EMI Shielding for Signal Integrity:** Fully shielded connectors ensure stable, interference-free data transfer every time.

## Overview

The DB9 null modem slimline adapter 2-pack by Arnorin converts standard serial cables into null modem configurations with a compact design that minimizes port strain. Featuring fully shielded connectors to block electromagnetic interference and reversible screws for a rock-solid connection, this adapter is a reliable, plug-and-play solution ideal for legacy device communication and professional setups.

## Description

Convert your existing straight wired cables to null modem or reverser (transmit & receive) cables with these handy, inexpensive adapters. Simply plug these adapters onto the end of a cable and you're done !

Review: Simple fix, works perfectly! - This adapter absolutely does the trick. I wasn't getting any signal at all with my setup, but as soon as I put this null modem adapter in, everything started working instantly. It's a very simple plug-and-play solution that just does the job perfectly. Highly recommend if you're dealing with serial communication signal issues! It even comes as a two-pack. I only need one, so I'm not sure what to do with the other now.
Review: Compact and secure null modem adapter with solid mechanical design - I purchased these for connecting legacy equipment that requires a null modem configuration, and they worked exactly as expected. The slimline form factor is helpful in tight setups where multiple DB9 connectors sit close together. Fit is solid once connected, and there’s no noticeable play in the connection. One detail I especially appreciate is the mechanical design of the screw posts. Each jack screw is essentially a double-sided threaded post — one end secures the adapter to the equipment’s serial port, and the other end has internal threading to accept the thumbscrews from the connected cable or another adapter. This allows the connection to be mechanically fastened on both sides, which adds stability and prevents accidental loosening in lab, rack, or field environments. Signal transfer has been stable with no communication issues during use. For serial troubleshooting or legacy device connections, they’ve been reliable.

## Features

- Converts standard, straight wired cables to null modem wiring
- Null modem configuration with pin 9 open
- Slimline design reduces leverage strain on computer ports
- UL grade 94V-0 connector insulator satisfies flammability requirements
- Screws are removable and reversible
- Fully shielded to protect against EMI (electromagnetic interference)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B075XHWVSJ |
| Best Sellers Rank | #8 in Serial Adapters |
| Brand | Arnorin |
| Color | 2 Pack |
| Compatible Devices | Modem |
| Connector Type | DB9 |
| Customer Reviews | 4.7 out of 5 stars 1,033 Reviews |
| External Testing Certification | Não aplicável |
| Input Voltage | 94 volts |
| Item Dimensions | 1.3 x 0.5 x 0.07 inches |
| Item dimensions L x W x H | 1.3 x 0.5 x 0.07 inches |
| Manufacturer | KINGDEE INC |
| Mfr Part Number | KAD9D90001-S-2 |
| Model Number | KAD9D90001-S-2 |
| Number of Items | 2 |
| Number of Ports | 2 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| UPC | 613852966235 |
| Unit Count | 2 Count |

## Product Details

- **Brand:** Arnorin
- **Color:** 2 Pack
- **Compatible Devices:** Modem
- **Connector Type:** DB9
- **Item dimensions L x W x H:** 1.3 x 0.5 x 0.07 inches

## Images

![DB9 null modem male to female slimline data transfer serial port adapter 2 Pack - Image 1](https://m.media-amazon.com/images/I/51FwpT4q21L.jpg)
![DB9 null modem male to female slimline data transfer serial port adapter 2 Pack - Image 2](https://m.media-amazon.com/images/I/61gjDe9iBqL.jpg)
![DB9 null modem male to female slimline data transfer serial port adapter 2 Pack - Image 3](https://m.media-amazon.com/images/I/61rW8NT+muL.jpg)
![DB9 null modem male to female slimline data transfer serial port adapter 2 Pack - Image 4](https://m.media-amazon.com/images/I/61nblFdL5gL.jpg)

## Questions & Answers

**Q: What i think i am seeing in the picture is two different converters.  is one a straight through gender changer & the other a null modem configuration?**
A: Both of them are standard null modem adapters

**Q: Will these pass sound so that I may plug in my Bose speakers?**
A: not sure your application, this is an RS232 signal swap adapter.
Here is pinout: pin-1 goes to pin-4, 
pin-2 to pin-3, 
pin-5 to pin-5, 
pin-7 to pin-8, and 
pins-6&9 are not connected.

**Q: do I have to use two connectors on each cable?**
A: No on one on each cable

**Q: Hi, are both of these the exact same? If not what is the difference?**
A: I ordered a 2 pack for work and they are the same.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple fix, works perfectly!
*by C***W on June 25, 2026*

This adapter absolutely does the trick. I wasn't getting any signal at all with my setup, but as soon as I put this null modem adapter in, everything started working instantly. It's a very simple plug-and-play solution that just does the job perfectly. Highly recommend if you're dealing with serial communication signal issues! It even comes as a two-pack. I only need one, so I'm not sure what to do with the other now.

### ⭐⭐⭐⭐⭐ Compact and secure null modem adapter with solid mechanical design
*by R***O on February 17, 2026*

I purchased these for connecting legacy equipment that requires a null modem configuration, and they worked exactly as expected. The slimline form factor is helpful in tight setups where multiple DB9 connectors sit close together. Fit is solid once connected, and there’s no noticeable play in the connection. One detail I especially appreciate is the mechanical design of the screw posts. Each jack screw is essentially a double-sided threaded post — one end secures the adapter to the equipment’s serial port, and the other end has internal threading to accept the thumbscrews from the connected cable or another adapter. This allows the connection to be mechanically fastened on both sides, which adds stability and prevents accidental loosening in lab, rack, or field environments. Signal transfer has been stable with no communication issues during use. For serial troubleshooting or legacy device connections, they’ve been reliable.

### ⭐⭐⭐⭐⭐ Had No Idea
*by J***B on December 22, 2023*

Having been born in 94, I had never heard of null modem communication. Suddenly, the place I work for needs to start testing RF cables. They bought me an older piece of equipment that can be interfaced with via an "RS232" appearing port. Grabbed my trusty usb to serial cable. Couldn't get anything. Took a week of emails back a forth with the OEM to figure out I need a "null modem cable" to plug my cable into first. ANYWAYYY, this fixed everything after having to run software on a virtual box. I assume that means this works perfectly for whatever it is this adapter is for. 11/10 still have no idea what null modem communication is but I'm impressed.

## Frequently Bought Together

- DB9 null modem male to female slimline data transfer serial port adapter 2 Pack
- Arnorin DB9 Null Modem Female to Female Slimline Data Transfer Serial Port Adapter 2 Pack
- Arnorin DB9 Null Modem Adapter Male to Male Slimline Data Transfer Serial Port Adapter 2 Pack

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-10-02*