# InLine 76660X Internal Serial Adapter M.2 Male 4 Gbit/s

**URL:** https://aio.lv/en/product--inline-76660x--11430068
**Data updated:** 2026-01-03 12:52 (EET)
**Category:** Serial & Parallel Cables
**Manufacturer:** InLine
**Manufacturer code:** 76660X
**EAN:** 4043718341627
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 82.49 €
**Prices and availability valid until:** 2026-07-07 23:59
**Price without VAT (21%):** 68.17 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--inline-76660x--11430068

## 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 76660X is an internal serial adapter featuring an M.2 male interface. It supports a maximum data transfer rate of 4 Gbit/s and operates at a power supply input voltage of 3.3 V. Compatible with various Windows and Linux operating systems, it is ideal for enhancing connectivity in computing systems.

## Long description

The InLine 76660X internal serial adapter is a compact M.2 card that adds two RS-232 DB9 serial ports to systems with an M.2 (B+M key) slot supporting PCIe. The adapter uses a PCIe 2.0 (5 GT/s) interface and integrates the ASIX AX99100 controller with 16C950 UART compatibility to provide reliable serial communication for industrial and embedded applications. Power is supplied via the M.2 slot (3.3 V); no additional power connection is required. Two low-profile and one high-profile slot bracket are included, together with DB9 cables and mounting screws.
Advantages
The card supports single-lane PCIe 2.0 throughput and automatic lane configuration detection at boot, enabling straightforward installation and integration. With an onboard LED indicator for activity and a 256-byte FIFO buffer, the adapter handles serial data reliably up to the specified transfer rate. The ASIX AX99100 controller provides 16C950 UART compatibility and the device requires no additional driver for common Windows and Linux distributions.
Suitable for
Industrial control systems and PLC communication
Embedded systems and single-board computers with M.2 PCIe slots
Serial devices such as measurement instruments, modems, and legacy equipment
Key specifications
Interface: M.2 59-pin (B+M key), PCIe 2.0 (single-lane, 5 GT/s)
Controller: ASIX AX99100 with 16C950 UART compatibility
Ports: 2 × RS-232 DB9 (9-pin)
Maximum serial transfer rate: up to 1 Mb/s
Data bits: 5, 6, 7, 8, 9
Flow control: None, Xon/Xoff, RTS/CTS
Parity: even, odd, none, mark, space
FIFO buffer: 256 bytes
Power: 3.3 V via M.2 slot
Operating temperature: -40 °C to +85 °C
Dimensions: 22 mm × 80 mm (M.2 board)
How to use
Install the InLine 76660X into an available M.2 slot (B+M key) on a motherboard that supports PCIe. Secure the card with the included screw and select the appropriate low- or high-profile bracket for the system chassis. Connect serial devices to the two DB9 ports using the supplied DB9 cables. The adapter draws power from the M.2 slot; no external power connection is necessary. On supported operating systems (Windows 11–XP and Linux kernel 2.6.31 or newer), the device is recognized without additional drivers.
Usage recommendations
For reliable serial communication, use shielded DB9 cables where appropriate and ensure the host motherboard BIOS is configured to enable M.2 PCIe endpoints. Verify operating system compatibility before installation and place the card in a slot that provides sufficient airflow to meet the specified operating temperature range.

## Specifications

| Feature | Value |
|---|---|
| Internal | Yes |
| Weight | 0.025 kg |
| Chipset | ASIX AX99100 |
| Operating temperature (T-T) | -40 - 85 |
| Serial interface type | 9-pin |
| Power supply input voltage | 3.3 |
| Serial ports quantity | 2 |
| LED indicators | Y |
| Width | 22 mm |
| Depth | 80 mm |
| Cables included | Serial |
| Host interface | M.2 |
| Country of origin | Taiwan |
| Manual | Yes |
| Package type | Hanging box |
| Drivers included | Yes |
| Windows operating systems supported | Windows 10, Windows 11, Windows 7, Windows 8, Windows 8.1 |
| Linux operating systems supported | Linux Kernel 5.9, Kernel 3.3, Kernel 4.6.4, Linux Kernel 5.10, Linux Kernel 5.11, Linux Kernel 5.12, Linux Kernel 5.13, Linux Kernel 5.14, Linux Kernel 5.15, Linux Kernel 5.19, Linux Kernel 5.4, Linux Kernel 5.8, Kernel 3.17, Linux Kernel 6.2, Kernel 2.6.31, Kernel 2.6.33, Kernel 3.12 |
| Server operating systems supported | Windows Server 2012 R2 |
| Output interface | Serial |
| Mounting brackets included | Yes |
| Data transfer rate (max) | 4 Gbit/s |
| Expansion card standard | PCI 3.0 |
| Host interface gender | Male |
| Compliance certificates | TÜV mark, Federal Communications Commission (FCC), CE |

## FAQ

### How much does the InLine 76660X Internal Serial Adapter cost, and is it available for purchase?

The price is 82.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 49 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. 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

## Image

https://aio.lv/img/cache/product/11430068/66172368_large.webp