Serial Adapter Card StarTech.com PCI 2 Port RS422/485

Name: Serial Adapter Card StarTech.com PCI PCI2S4851050
Brand: StarTech
SKU: 298306
Price: 28.99 EUR
Availability: InStock

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Serial Adapter Card StarTech.com PCI 2 Port RS422/485 161050 UART

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Offer for legal entity, cashless payment. Why is an item available only for a legal entity?
This is due to long delivery times and limited product warranties.

Short description

The StarTech.com 2 Port PCI RS422/485 Serial Adapter Card features a PCI/PCI-X host interface and supports RS-422 and RS-485 serial connections. With a baud rate of 128 Kbit/s and a FIFO buffer of 256 B, it ensures efficient data transmission. Compatible with various Windows operating systems, including Windows 10 and Windows Server editions, this adapter card is ideal for industrial applications requiring reliable serial communication.

Available at price 28.99 €: 7 pcs.

Total available for order: 14 pcs.

Warranty: 2 Years

SKU: 298306

Manufacturer: StarTech

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From 4.99 € (Weight: 1.15 kg)

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Product information

Description

The StarTech.com PCI2S4851050 2-Port PCI Serial Adapter Card provides two DB9 RS422/RS485 serial ports using a single PCI expansion slot. It is built around a high-performance 16C1050 UART and offers a large 256‑byte transmit/receive FIFO buffer to support high-speed serial communication while reducing CPU load. The card supports both 2‑wire and 4‑wire RS485 modes and is compatible with 3.3V or 5V PCI/PCI‑X slots. Standard and low-profile (half‑height) brackets are included to fit a wide range of system form factors.

Advantages

The adapter’s 256‑byte FIFO buffer is substantially larger than typical serial cards, minimizing data loss and improving host efficiency. A jumper-selectable interface lets you switch between RS422 and RS485 to match your application. The single-chip design provides efficient performance in a compact PCI form factor, and included brackets make installation straightforward in full‑height or low‑profile systems.

Suitable for

Connecting industrial RS422 or RS485 serial equipment to a desktop or server via a PCI/PCI‑X slot
Applications requiring robust serial links with reduced CPU overhead
Systems that need support for both 2‑wire and 4‑wire RS485 configurations

Key specifications

Model: PCI2S4851050 (StarTech.com)
Ports: 2 × DB9 serial (RS422/RS485)
UART: 16C1050
FIFO buffer: 256 bytes transmit/receive
Host interface: PCI / PCI‑X (3.3V or 5V compatible)
Baud rate: up to 128 Kbit/s (as specified by product data)
Form factor: internal PCI card; includes standard and low‑profile brackets
Weight: 0.058 kg

How to use

Install the card into an available PCI or PCI‑X slot on the host system, choosing the appropriate bracket (standard or low‑profile) before mounting. Connect RS422 or RS485 devices to the DB9 ports using suitable serial cables. Use the onboard jumper to select RS422 or RS485 mode according to the connected device and wiring (2‑wire or 4‑wire for RS485). Install any required drivers for your operating system to enable the serial ports.

Usage recommendations

For reliable operation, match the card’s interface setting to the device wiring and ensure proper grounding and termination on RS422/RS485 lines. Use shielded cables where appropriate and verify driver compatibility with your Windows or server OS before deployment.

Specifications

Host interface:: PCI/PCI-X
Weight:: 0.058 kg
Internal:: Yes
Output interface:: Serial

All features

Operational conditions

Operating relative humidity (H-H):: 5 - 85
Storage temperature (T-T):: -20 - 100
Operating temperature (T-T):: -10 - 80

Technical details

Compliance certificates:: RoHS

Ports & interfaces

Serial interface type:: RS-485, RS-422
Serial ports quantity:: 2
Host interface:: PCI/PCI-X
Output interface:: Serial

Other features

Data transfer rate:: 0.128 Mbit/s
Manual:: Yes
Drivers included:: Yes

Weight & dimensions

Weight:: 0.058 kg
Package weight:: 152 g
Height:: 45 mm
Width:: 15 mm
Depth:: 120 mm

System requirements

Compatible operating systems:: Windows 7 (32/64bit)/ Vista(32/64)/ XP(32/64), Windows Server 2008 R2/ 2003(32/64)/ 2000, Linux 2.4.x/ 2.6.x
Windows operating systems supported:: Windows 8, Windows 7 Ultimate x64, Windows 8 Pro, Windows 8 Enterprise, Windows 8 Enterprise x64, Windows 7 Ultimate, Windows 7 Starter x64, Windows 7 Starter, Windows 7 Professional x64, Windows 7 Professional, Windows 8 Pro x64, Windows 8 x64, Windows 8.1, Windows 8.1 Enterprise x64, Windows 8.1 Pro, Windows 8.1 Pro x64, Windows 8.1 x64, Windows 7 Enterprise x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 Pro, Windows 10 Pro x64, Windows 7 Enterprise, Windows 7 Home Basic, Windows 7 Home Basic x64
Server operating systems supported:: Windows Server 2003, Windows 2000 Server, Windows Server 2008 R2, Windows Server 2012

Design

Internal:: Yes

Performance

Certification:: CE, FCC
Chipset:: SystemBase -SB16C1052PCI

Logistics data

Harmonized System (HS) code:: 84733020

Features

Flow control support:: Yes
Baud rate:: 128 Kbit/s
Data bits:: 5, 6, 7, 8
Stop bits:: 1, 1.5, 2
FIFO (First In, First Out):: 256

Packaging data

Package depth:: 175 mm
Package height:: 32 mm
Package width:: 145 mm

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Instructions

mmo_9480538_1478180588_9772_23655.pdf

startech-PCI2S4851050-298306.pdf

Description

Instructions

mmo_9480538_1478180588_9772_23655.pdf

startech-PCI2S4851050-298306.pdf

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Available only for legal entities
Warehouse	Stock	Delivery to the store	Store Price
EU9	7	26.06.2026 Best delivery	28.99 € Best price
WH109	7	10.07.2026	33.49 €

Available only for legal entities

28.99 €

Stock: 7

Delivery Date: 26.06.2026 Best delivery

Warehouse: EU9

33.49 €

Stock: 7

Delivery Date: 10.07.2026

Warehouse: WH109

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Customer questions

FAQ

How much does the Serial Adapter Card StarTech.com PCI 2 Port RS422/485 cost, and is it available for purchase?

The price is 28.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 14 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 26.06.2026 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. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

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.

Where can I download the instructions for Serial Adapter Card StarTech.com PCI 2 Port RS422/485?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

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