# InLine Null Modem Adapter DB9 Pin male / female

**URL:** https://aio.lv/en/product--inline-31437--1092741
**Data updated:** 2026-01-03 12:48 (EET)
**Category:** Cable Adapters & Converters
**Manufacturer:** InLine
**Manufacturer code:** 31437
**EAN:** 4043718084524
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 7.43 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-31437--1092741

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The InLine Null Modem Adapter features a 9-pin female connector and a DB9 male connector, allowing for seamless serial communication between devices. Its silver color adds a sleek look, while the compact design ensures easy portability. Ideal for connecting computers, printers, and other serial devices, this adapter is a reliable solution for your connectivity needs.

## Long description

The InLine Null Modem Adapter DB9 Pin male / female is an inline serial adapter that connects to an existing serial cable and enables point-to-point serial data transmission between two PCs or other RS‑232 devices. It provides a 9‑pin Sub D female connector on one side and a 9‑pin Sub D male plug on the other, with a crosswired pin assignment to implement null‑modem functionality.
Advantages
This adapter implements the required pin crossover in a compact in‑line form factor, requiring no additional wiring or configuration. It is compatible with standard DB9 serial cables and devices, is lightweight and easy to carry, and preserves the typical metal-shell DB9 mechanical connection for reliable contact.
Suitable for
 Direct serial communication between two computers (PC to PC)
 Connecting serial devices such as printers, measurement instruments, or legacy equipment that require null‑modem wiring
 Field or workshop use where a quick null‑modem connection is needed without rewiring
Key specifications
 Connector 1: 9‑pin Sub D female (DB9 female)
 Connector 2: 9‑pin Sub D male (DB9 male)
 Pin assignment (female -\> male): 1+6 → 4, 2 → 3, 3 → 2, 4 → 6+1, 5 → 5, 7 → 8, 8 → 7, S → S, pin 9 not connected
 Colour: Silver
 Manufacturer: InLine, MPN: 31437, EAN: 4043718084524
How to use
Attach the adapter inline to an existing DB9 serial cable by connecting the DB9 male or female ends as required so that the adapter sits between the two cable ends or between a cable and a device. Once connected, establish a serial connection between the two devices using appropriate serial settings (baud rate, parity, data bits, stop bits) in the host software or terminal emulator. No additional configuration of the adapter is necessary.
Usage recommendations
Verify pinout compatibility with your devices before use and ensure serial communication parameters match on both ends. Do not rely on pin 9, as it is not connected on this adapter; if your equipment requires ring indicators or hardware flow control using that pin, use a different adapter or wiring solution.

## Specifications

### Features

| Feature | Value |
|---|---|
| Product colour | Silver |
| Connector 1 | 9pin female |
| Connector 2 | DB9 |
| Connector 1 gender | Male |
| Connector 2 gender | Female |

### Technical details

| Feature | Value |
|---|---|
| Housing material | Metal |

## FAQ

### How much does the Null Modem Adapter InLine 31437 cost, and is it available for purchase?

The price is 8.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1918 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All InLine products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized InLine service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: connector 1, connector 2, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

### Where can I download the instructions for Null Modem Adapter InLine 31437?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/1092741/64142209_large.webp