# Internal RS-232 Interface Card Sunix SER6437AL — PCIe, 115.2 Kbit/s, 128B FIFO, 65×68 mm

**URL:** https://aio.lv/en/product--sunix-ser6437al--4972019
**Data updated:** 2026-03-27 13:35 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** Sunix
**Manufacturer code:** SER6437AL
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 79.99 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 66.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sunix-ser6437al--4972019

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

Sunix SER6437AL is an internal RS-232 interface card that connects via PCIe and provides serial communication at up to 115.2 Kbit/s. It features a 128-byte FIFO buffer, configurable stop bits (1, 1.5, 2) and is certified CE, FCC, VCCI, BSMI. Compact dimensions (65 × 68 mm) and boxed packaging make it suitable for industrial PCs, embedded systems and legacy device integration.

## Long description

Sunix SER6437AL is an internal RS-232 interface card that installs into a PCIe slot to add or expand two serial COM ports on PC-based systems. The board supports data rates up to 115.2 Kbit/s, uses a 128-byte FIFO buffer and is compatible with common PCIe lane widths. Its compact 65 × 68 mm form factor and low-profile bracket design suit installation in industrial PCs, embedded systems and standard desktop chassis where legacy serial connectivity is required.
Advantages
The SER6437AL provides reliable serial communication with a 128B FIFO to reduce CPU overhead and improve data throughput. Compliance with PCI Express Base Specification Revision 2.0 and support for multiple PCIe lane configurations (x1, x2, x4, x8, x16) ensure broad motherboard compatibility. Onboard SUN2212 UART controller and 16C950-compatible features deliver stable UART functionality and configurable stop bits (1, 1.5, 2). Certifications including CE, FCC, VCCI and BSMI indicate regulatory conformity for international deployments.
Suitable for
Industrial automation systems requiring reliable RS-232 ports
Embedded systems and single-board computers needing serial expansion
Point-of-sale, laboratory and legacy equipment integration
Applications where low-profile or compact expansion cards are required
Key specifications
Interface: PCI Express (compliant with PCIe Base Specification Revision 2.0)
Serial standard: RS-232, 2 COM ports
Maximum data rate: 115.2 Kbit/s
Onboard buffer: 128-byte FIFO
UART compatibility: 16C950-compatible, SUN2212 UART controller
Configurable stop bits: 1, 1.5, 2
Form factor: compact card, low-profile bracket support
Dimensions: 65 × 68 mm
Packaging: boxed
Certifications: CE, FCC, VCCI, BSMI
How to use
Install the SER6437AL into an available PCIe slot (x1/x2/x4/x8/x16) on the host motherboard, secure the card with the bracket and connect required external devices to the RS-232 COM ports. After physical installation, power on the system and install appropriate drivers provided by the system vendor or Sunix to enable UART functions. Configure serial parameters (baud rate up to 115.2 Kbit/s, data bits, parity, stop bits) in the operating system or application to match connected serial devices.
Usage recommendations
For stable operation in industrial environments, use shielded serial cables, ensure proper grounding of the host system, and select driver versions that match the operating system. When integrating legacy equipment, verify baud rate and stop bit settings to avoid communication errors. Choose the low-profile bracket when installing in slim chassis to ensure proper fit.

## Specifications

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 95 |
| Storage temperature (T-T) | -20 - 85 |
| Operating temperature (T-T) | 0 - 60 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Host interface | PCIe |
| Output interface | RS-232 |
| SATA revision | 2.0 |

### Other features

| Feature | Value |
|---|---|
| Quantity | 1 |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 68 mm |
| Width | 65 mm |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Y |
| Linux operating systems supported | Y |

### Design

| Feature | Value |
|---|---|
| Internal | Yes |

### Performance

| Feature | Value |
|---|---|
| Certification | CE, FCC, VCCI, BSMI |

### Logistics data

| Feature | Value |
|---|---|
| Harmonized System (HS) code | 84733020 |

### Features

| Feature | Value |
|---|---|
| Plug and Play | Yes |
| Flow control support | Yes |
| Baud rate | 115.2 Kbit/s |
| Stop bits | 1.5, 1, 2 |
| Parity bit | Space, Odd, N, Mark, Even |
| Flow Control type | XON/XOFF, RTS/CTS, N |
| FIFO (First In, First Out) | 128 |

### Packaging data

| Feature | Value |
|---|---|
| Package type | Box |
| Quick installation guide | Yes |
| Mounting brackets included | Yes |

## FAQ

### How much does the RS-232 PCIe Card Sunix SER6437AL cost, and is it available for purchase?

The price is 79.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 36 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 07.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can RS-232 PCIe Card Sunix SER6437AL be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Sunix 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 Sunix 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: host interface, internal, output interface, 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.

## Image

https://aio.lv/img/cache/product/4972019/59210348_large.webp