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header-product PCIe 4-Port Serial Combo Card StarTech PEX4S232485 — 2×RS232, 2×RS422/RS485, SystemBase SB16C1052PCI, 256B FIFO
197.49 €
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AiO.lv Computer Components Desktops accessories Thermal Paste StarTech

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

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StarTech PEX4S232485 PCIe 4-Port Serial Combo Card Photo 1
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StarTech PEX4S232485 PCIe 4-Port Serial Combo Card Photo 1
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PCIe 4-Port Serial Combo Card StarTech PEX4S232485 — 2×RS232, 2×RS422/RS485, SystemBase SB16C1052PCI, 256B FIFO
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PCIe 4-Port Serial Combo Card StarTech PEX4S232485 — 2×RS232, 2×RS422/RS485, SystemBase SB16C1052PCI, 256B FIFO

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

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Short 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.
Available for order: 5 pcs.
Warranty: 2 Years
SKU: 3916373
Manufacturer: StarTech
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Product information

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.

All features
Internal: The product is built in.
Yes
Chipset: Set of electronic components in an integrated circuit that manages the data flow between the processor, memory and peripherals. It is usually found in the motherboard of a computer. Chipsets are usually designed to work with a specific family of microprocessors. Because it controls communications between the processor and external devices, the chipset plays a crucial role in determining system performance.
SystemBase SB16C1052PCI
Serial interface type:
RS-232/422/485
Serial ports quantity: The number of serial ports in a computer or peripheral. A serial port is a serial communication physical interface through which information transfers in or out one bit at a time. The term "serial port" usually identifies hardware more or less compliant to the RS-232 standard, intended to interface with a modem or with a similar communication device. In modern computers and peripherals, serial ports have largely been replaced by USBs and other interfaces.
4
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wired
Data transfer rate: Rate at which data can be transferred, usually measured in units per second. May vary with network configurations.
0.4608 Mbit/s
Host interface: Interface that enables a host controller to communicate with a driver.
PCIe
Windows operating systems supported: Windows vesions wich can be used with the device.
Windows Vista Business, Windows 7 Starter, Windows 7 Starter 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 7 Professional x64, Windows Vista Business 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 Professional x64, Windows XP Professional, Windows XP Home 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
Linux operating systems supported: 8 RT. Linux (9.4, 9.5), Red Hat Enterprise Linux 5.0 (supported with a pre-built package); SUSE Linux (10.3, 11.0, 11, 11.1, 11.2), Fedora (9, 9.0, 10, 10.0, 11.0, 11, 12, 12.0), Ubuntu (8.04, 8.04.1, 8.04.2, 8.10, 9.04, 9.10, 10.04), Debian (5.0, 5.0.1, 5.0.2, 5.0.3)
Yes
User guide:
Yes
Output interface: The socket (port) where the output connectors are connected.
Serial
FIFO (First In, First Out):
256

Logistics data

Harmonized System (HS) code:
84733020

Packaging data

Package weight: Weight of the packaged product.
390 g
Package height: The distance from the top to the bottom of the packaging.
41 mm
Package depth: The distance from the front to the back of the packaging.
210 mm
Package width: The distance from one side of the packaging to the other.
146 mm

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
0.0674 kg
Height: The measurement of the product from head to foot or from base to top.
20 mm
Depth: The distance from the front to the back of something.
70 mm
Width: The measurement or extent of something from side to side.
125 mm

Technical details

Sustainability certificates:
RoHS

Features

Operating relative humidity (H-H):
20 - 80
Storage temperature (T-T): The minimum and maximum temperatures at which the product can be safely stored.
0 - 150
Operating temperature (T-T): The minimum and maximum temperatures at which the product can be safely operated.
0 - 100

Description

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

The price is 197.49 € (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 12.10.2026 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. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the StarTech PEX4S232485 PCIe 4-Port Serial Combo Card online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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