# PCIe 4-Port Serial Combo Card StarTech PEX4S232485 — 2×RS232, 2×RS422/RS485, SystemBase SB16C1052PCI, 256B FIFO

**URL:** https://aio.lv/en/product--startech-pex4s232485--3916373
**Data updated:** 2026-03-11 11:44 (EET)
**Category:** Thermal Paste
**Manufacturer:** StarTech
**Manufacturer code:** PEX4S232485
**EAN:** 0065030849357
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 196.49 €
**Prices and availability valid until:** 2026-07-08 23:59
**Price without VAT (21%):** 162.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-pex4s232485--3916373

## 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

PCI Express 4-port serial combo card by StarTech (model PEX4S232485) provides two RS-232 ports and two RS-422/RS-485 ports via a PCIe host interface. Uses SystemBase SB16C1052PCI chipset with 256-byte FIFO. Suitable for industrial and embedded systems requiring mixed serial connectivity, device control, data acquisition, and legacy equipment integration. Dimensions: 125×70×20 mm. Weight 0.0674 kg.

## Long description

The StarTech PEX4S232485 PCIe 4-Port Serial Combo Card adds two RS-232 ports and two RS-422/RS-485 ports to a computer via a PCI Express expansion slot. Built around the SystemBase SB16C1052PCI chipset with a 256-byte FIFO, this single-card solution supports RS-232, RS-422 and RS-485 (2-wire and 4-wire) protocols. The card is designed for full-size and small form factor systems, includes both full- and low-profile brackets, and ships with a breakout cable for consolidated external connections. Physical dimensions are 125×70×20 mm and the card weighs approximately 0.0674 kg. The operating temperature range is specified from 0 to 100°C.
Advantages
This PCIe serial combo card provides mixed-protocol serial connectivity on one board, enabling simultaneous RS-232 and RS-422/RS-485 device connections without requiring multiple adapters. The SystemBase SB16C1052PCI chipset with 256-byte FIFO helps maintain reliable data throughput and reduces CPU overhead for serial communications. Inclusion of both low-profile and full-profile brackets ensures compatibility with a wide range of chassis, while the supplied breakout cable simplifies wiring and reduces cable clutter.
Suitable for
Industrial control systems requiring mixed RS-232 and RS-422/RS-485 interfaces
Data acquisition and telemetry where multiple serial protocols are used
Legacy equipment integration in servers, workstations, and embedded PCs
Point-of-sale, manufacturing automation, and instrumentation connectivity
Key specifications
Interface: PCI Express x1 host interface
Serial ports: 2 × RS-232, 2 × RS-422 / RS-485 (supports 2-wire and 4-wire RS-485)
Chipset: SystemBase SB16C1052PCI
FIFO buffer: 256-byte FIFO per channel
Dimensions: 125 × 70 × 20 mm
Weight: 0.0674 kg
Operating temperature: 0–100 °C
Includes: full-profile and low-profile brackets, breakout cable
How to use
Power down the system and insert the card into an available PCI Express slot, securing it with the appropriate bracket for the chassis. Reconnect power and install any required drivers for your operating system, then connect serial devices to the breakout cable using the appropriate protocol wiring for RS-232, RS-422 or RS-485. Configure serial port settings (baud rate, parity, stop bits, flow control) in your operating system or application to match the connected devices. For RS-485 networks, ensure correct termination and biasing according to the network topology and device requirements.
Usage recommendations
Use the supplied breakout cable to centralize connections and label each attached cable for easier maintenance. For reliable RS-485 communication, implement proper termination resistors and biasing, and keep cable runs within recommended distance and shielding practices for industrial environments.

## Specifications

| Feature | Value |
|---|---|
| Internal | Yes |
| Chipset | SystemBase SB16C1052PCI |
| Serial interface type | RS-232/422/485 |
| Serial ports quantity | 4 |
| Connectivity technology | Wired |
| Data transfer rate | 0.4608 Mbit/s |
| Host interface | PCIe |
| Windows operating systems supported | Windows Vista Enterprise x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 8 Pro, Windows 8 Pro x64, Windows 8 x64, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows 7 Starter 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 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 |
| Linux operating systems supported | Y |
| User guide | Yes |
| Output interface | Serial |
| FIFO (First In, First Out) | 256 |

### Logistics data

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

### Features

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

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 390 g |
| Package depth | 210 mm |
| Package height | 41 mm |
| Package width | 146 mm |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.0674 kg |
| Height | 20 mm |
| Width | 125 mm |
| Depth | 70 mm |

### Technical details

| Feature | Value |
|---|---|
| Sustainability certificates | RoHS |

## FAQ

### How much does the StarTech PEX4S232485 PCIe 4-Port Serial Combo Card cost, and is it available for purchase?

The price is 196.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can StarTech PEX4S232485 PCIe 4-Port Serial Combo Card 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 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: operating temperature (t-t), weight, 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/3916373/56508877_large.webp