# Serial Combo Card StarTech.com PEX4S232485

**URL:** https://aio.lv/en/product--startech-pex4s232485--632193
**Data updated:** 2026-02-24 11:00 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** StarTech
**Manufacturer code:** PEX4S232485
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 165.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 137.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-pex4s232485--632193

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

The StarTech.com 4 Port PCI Express Serial Combo Card features 2 x RS232 and 2 x RS422/RS485 ports, ideal for connecting multiple serial devices. It uses a PCIe interface and supports Windows operating systems including Windows 2000 and Windows 7. The card is equipped with a SystemBase SB16C1052PCI chipset and has a FIFO buffer of 256 B for efficient data handling. Dimensions: 125 mm x 70 mm x 20 mm.

## Long description

The StarTech.com PEX4S232485 is a 4-port PCI Express serial combo card that provides two RS232 and two RS422/RS485 ports for expanding serial connectivity on desktop and small form factor PCs. Designed to fit a PCIe expansion slot, the card uses a SystemBase SB16C1052PCI chipset and a 256-byte FIFO buffer to reliably handle serial data streams. Physical dimensions are 125 mm x 70 mm x 20 mm, and the card includes both full-height and low-profile brackets plus a breakout cable for tidy external connections.
Advantages
This single-board solution supports RS-232, RS-422 and RS-485 (2-wire and 4-wire) communication modes, enabling connection to a wide range of serial devices and mixed-protocol environments. The included breakout cable reduces cable clutter and installation time, while the dual bracket design ensures compatibility with full-size and small form factor systems. The onboard FIFO buffer improves data handling under high-throughput or burst conditions.
Suitable for
Connecting legacy RS232 devices such as modems, barcode scanners, and serial printers
Industrial and automation equipment using RS422 or RS485 protocols
POS systems and kiosks requiring multiple serial ports
Embedded or small form factor PCs where additional serial ports are needed
Key specifications
Host interface: PCIe (PCI Express)
Ports: 2 x RS232, 2 x RS422/RS485 (supports RS-485 2-wire and 4-wire modes)
Chipset: SystemBase SB16C1052PCI
FIFO buffer: 256 bytes
Included accessories: breakout cable, full-height and low-profile brackets
Form factor compatibility: full-size and small form factor PCs
Internal card mounting: Yes
Weight: 0.0674 kg
Dimensions: 125 mm x 70 mm x 20 mm
How to use
Power down the PC and insert the PEX4S232485 into an available PCIe slot, then secure the card using the appropriate bracket (full-height or low-profile). Connect the breakout cable to the card and route the cable to your serial devices. Install any required drivers for your operating system; the card supports common Windows versions including Windows 2000 through Windows 7. Configure serial port settings (baud rate, parity, data bits, stop bits, and protocol mode RS232/RS422/RS485) within your application or operating system to match the connected devices.
Usage recommendations
For reliable communication, match serial settings between the PEX4S232485 and each connected device and use shielded cabling where possible in electrically noisy environments. When using RS485 in multi-drop configurations, implement proper termination and biasing resistors to prevent signal reflections. Verify driver compatibility with your specific Windows build before deployment and retain the low-profile bracket if installing in compact systems.

## Specifications

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 80 |
| Storage temperature (T-T) | 0 - 150 |
| Operating temperature (T-T) | 0 - 100 |

### Technical details

| Feature | Value |
|---|---|
| Compliance certificates | RoHS |

### Ports & interfaces

| Feature | Value |
|---|---|
| Serial interface type | RS-232/422/485 |
| Serial ports quantity | 4 |
| Host interface | PCIe |
| Output interface | Serial |

### Other features

| Feature | Value |
|---|---|
| Connectivity technology | Wired |
| Data transfer rate | 0.4608 Mbit/s |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.0674 kg |
| Package weight | 390 g |
| Height | 20 mm |
| Width | 125 mm |
| Depth | 70 mm |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Windows 8 Enterprise, Windows Vista Business, Windows Vista Business x64, Windows 8 x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64, Windows 8 Pro, Windows 2000, Windows 2000 Professional, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise x64, Windows 8 Pro x64 |
| Linux operating systems supported | Y |

### Design

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

### Performance

| Feature | Value |
|---|---|
| Chipset | SystemBase SB16C1052PCI |

### Logistics data

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

### Features

| Feature | Value |
|---|---|
| FIFO (First In, First Out) | 256 |

### Packaging data

| Feature | Value |
|---|---|
| Package depth | 210 mm |
| Package height | 41 mm |
| Package width | 146 mm |
| User guide | Yes |

## FAQ

### How much does the Serial Combo Card StarTech.com PEX4S232485 cost, and is it available for purchase?

The price is 165.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 03.07.2026 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 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

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

When making a choice, we recommend paying attention to the key features: host interface, weight, 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/632193/65747869_large.webp