# StarTech.com 3m RS232 Serial Null Modem Cable DB9 Female to Male

**URL:** https://aio.lv/en/product--startech-9fmnm-3m-rs232-cable--5053655
**Data updated:** 2025-12-30 05:53 (EET)
**Category:** Serial & Parallel Cables
**Manufacturer:** StarTech
**Manufacturer code:** 9FMNM-3M-RS232-CABLE
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 10.49 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 8.67 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-9fmnm-3m-rs232-cable--5053655

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 29.06.2026 | free |
| Pickup points | 02.07.2026 | 1.99 EUR |
| Courier delivery to door | 02.07.2026 | 4.99 EUR |

## Summary description

The StarTech.com 3m RS232 Serial Null Modem Cable features a DB9 connector, designed for DTE devices. It offers reliable data transmission with Al-Mylar shielding, ensuring minimal interference. The cable length of 3 meters provides flexibility for various setups.

## Long description

The StarTech.com 3m RS232 Serial Null Modem Cable DB9 Female to Male provides a 3 meter connection between serial devices using a DB9 female-to-male null modem wiring. Designed for DTE and serial-enabled equipment, the cable supports flexible placement of devices while maintaining reliable RS232 data transmission through its AL-Mylar shielding and shielded metal shell connectors.
Advantages
The crossover (null modem) wiring allows direct serial communication between DTE devices without additional adapters. Shielded metal shell connectors and aluminum-mylar cable shielding reduce electromagnetic interference (EMI) for more stable signal integrity. Thumbscrews on the DB9 connectors secure the connection to prevent accidental disconnection and potential data loss. The product includes lifetime warranty coverage and free lifetime 24/5 multi-lingual technical support.
Suitable for
Connecting DTE devices such as computers, terminals or routers for serial communication
Point-to-point data transfer between serial-enabled instruments and equipment
Temporary or semi-permanent setups requiring up to 3 m cable length
Key specifications
Connector A: DB9 Female
Connector B: DB9 Male
Cable type: RS232 null modem (crossover) cable
Length: 3 m
Shielding: Aluminum-mylar foil with overall braided/shielded metal shell connectors
Manufacturer: StarTech.com
MPN: 9FMNM-3M-RS232-CABLE
How to use
Attach the DB9 female end to the DTE device designated for the female connector and the DB9 male end to the opposite serial device. Tighten the thumbscrews on both connectors to secure the connection. Ensure devices are powered off when connecting or disconnecting to avoid data corruption, then power on and configure serial port settings (baud rate, parity, stop bits) in the host devices as required by your application.
Usage recommendations
For optimal performance, route the cable away from high-power electrical lines or sources of strong EMI. Use appropriate serial settings on both devices to match communication parameters and verify connections are secured with the thumbscrews to prevent intermittent disconnections.

## Specifications

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 15 - 60 |
| Storage temperature (T-T) | 20 - 80 |
| Package weight | 150 g |
| Operating temperature (T-T) | 20 - 80 |
| Cable length | 3 m |
| Product colour | Black |
| Package depth | 130 mm |
| Package height | 40 mm |
| Package width | 220 mm |
| Master (outer) case height | 275 mm |
| Master (outer) case width | 400 mm |
| Connector 1 | DB-9 |
| Connector 2 | DB-9 |
| Connector contacts plating | Nickel |
| Connector 1 form factor | Straight |
| Connector 2 form factor | Straight |
| Jacket material | Polyvinyl chloride (PVC) |
| AWG wire size | 28 |
| Cable shielding | Aluminum mylar foil |
| Connector 1 gender | Male |
| Connector 2 gender | Female |
| Quantity per pack | 1 pc(s) |
| Master (outer) case length | 360 mm |
| Products per master (outer) case | 100 pc(s) |
| Harmonized System (HS) code | 84733080 |
| Sustainability compliance | Yes |
| Sustainability certificates | RoHS |

## FAQ

### How much does the RS232 Serial Null Modem Cable StarTech.com 3m cost, and is it available for purchase?

The price is 10.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 258 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 29.06.2026 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. 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 StarTech 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 StarTech 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

### Where can I download the instructions for RS232 Serial Null Modem Cable StarTech.com 3m?

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/5053655/56589339_large.webp