# Serial I/O Card Dell ASSY,CRD,I/O,SERIAL,MT/SFF D10 (MPN KMW3T) - RS-232 Serial Port Card for OptiPlex

**URL:** https://aio.lv/en/product--dell-kmw3t--5023186
**Data updated:** 2026-04-14 14:16 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Dell
**Manufacturer code:** KMW3T
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 45.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 37.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dell-kmw3t--5023186

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 01.07.2026 | free |
| Pickup points | 06.07.2026 | 1.99 EUR |
| Courier delivery to door | 06.07.2026 | 4.99 EUR |

## Summary description

Dell ASSY,CRD,I/O,SERIAL,MT/SFF D10 (MPN KMW3T) is a motherboard I/O serial expansion card providing an RS-232 serial port for compatible Dell OptiPlex desktops. Designed to restore or add legacy serial connectivity, it enables connection of industrial equipment, POS devices, modems and serial consoles. Fits specified MT/SFF OptiPlex systems and integrates with system I/O headers.

## Long description

Dell ASSY,CRD,I/O,SERIAL,MT/SFF D10 is an internal serial I/O card that provides a single RS-232 serial port for compatible Dell OptiPlex desktop systems. The card is intended to install on the motherboard I/O header in specified Mini Tower (MT) and Small Form Factor (SFF) models to restore or add legacy serial connectivity. It enables direct wired communication with devices that rely on asynchronous serial communication.
Advantages
This serial port card offers a compact, board-level solution to add RS-232 connectivity without occupying external expansion slots. It integrates with the system I/O header for a clean internal installation and preserves desktop external ports for other uses. The card is suitable for maintaining compatibility with established peripherals and industrial equipment that continue to use serial interfaces.
Suitable for
Connecting point-of-sale (POS) hardware that uses RS-232 interfaces
Linking to serial modems and legacy communication devices
Attaching industrial controllers, barcode scanners or label printers with serial ports
Accessing serial consoles for network equipment or embedded systems
When it may not be suitable
This internal serial I/O card is not appropriate for systems that lack the specific motherboard I/O header required for installation or for desktops that do not match the compatible MT/SFF OptiPlex models. It does not provide USB-to-serial functionality and is not an external adapter; it requires internal mounting and a matching chassis opening for the connector.
Key specifications
Interface: RS-232 serial port (DB-9 physical connector)
Installation: Internal card that connects to system motherboard I/O header
Form factor compatibility: Designed for specified Mini Tower and Small Form Factor OptiPlex desktops
Purpose: Adds or restores legacy serial communication capability
How to use
Power off the PC and disconnect it from mains before installing the card. Open the chassis following the system service manual, locate the correct motherboard I/O header and attach the card’s connector to that header. Secure the card to the chassis so the external DB-9 connector aligns with the rear panel opening. Reassemble the case, reconnect power and peripherals, then boot the system. Verify the operating system recognizes the serial port and install any required drivers or BIOS updates specified by the system manufacturer before connecting serial devices.
What to consider before purchase
Confirm that your OptiPlex model (MT or SFF) supports an internal serial I/O card and has the required I/O header
Ensure your chassis has an available rear opening for the DB-9 connector alignment
Check operating system compatibility and availability of drivers for your specific system
Verify that the connected equipment uses RS-232 signaling and compatible voltage/handshake settings
Usage recommendations
Use shielded serial cables and keep cable runs as short as practical to reduce interference. When connecting industrial devices, confirm handshake and baud rate settings on both ends before deployment. For critical systems, test the serial connection after installation and before integrating into production workflows.

## FAQ

### How much does the Dell ASSY CRD I/O SERIAL D10 RS-232 Card cost, and is it available for purchase?

The price is 45.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 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 01.07.2026 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: Cash payment, 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 Dell 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 Dell 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

## Image

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