# 4-Port Serial PCIe Card StarTech.com PS74ADF-SERIAL-CARD RS232 RS422 RS485

**URL:** https://aio.lv/en/product--startech-ps74adf-serial-card--10810227
**Data updated:** 2025-12-30 12:42 (EET)
**Category:** I/O Adapters & Controllers
**Manufacturer:** StarTech
**Manufacturer code:** PS74ADF-SERIAL-CARD
**EAN:** 0065030903141
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 199.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 165.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--startech-ps74adf-serial-card--10810227

## 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 Serial PCIe Card supports RS232, RS422, and RS485 interfaces, allowing connection of multiple serial devices. It features a low-profile bracket, high baud rates, and ESD protection for reliable performance. Compatible with Windows and Linux systems.

## Long description

Add four DB9 serial ports to a desktop or small form factor (SFF) system with the 4-Port Serial PCIe Card by StarTech.com (PS74ADF-SERIAL-CARD). The card provides flexible serial connectivity by allowing each DB9 port to be independently configured for RS-232, RS-422, or 2/4-wire RS-485 standards. It includes LED activity indicators per port and a low-profile form factor suitable for many PCIe x1 slots.
Advantages
The card supports per-port serial configuration via on-board DIP switches, enabling mixed-mode installations. Configurable external power over pin 9 (12V at 1.5A per port, 5V at 1.5A per port, or no power/RI) is selectable with jumpers. LEDs provide real-time port activity monitoring. The adapter is compatible with common operating systems such as Windows and Linux and includes ESD protection and support for high baud rates to ensure reliable communication with serial peripherals.
Suitable for
Point-of-sale terminals and barcode scanners
PLC, factory control and industrial automation systems
Laboratory instruments, scientific sensors, and oscilloscopes
Medical equipment and diagnostic devices
Legacy serial devices requiring continued connectivity in modern systems
Key specifications
Manufacturer: StarTech.com
Model / MPN: PS74ADF-SERIAL-CARD
Interfaces supported: RS-232, RS-422, RS-485 (2/4-wire)
Ports: 4 × DB9 serial ports
Host interface: PCIe x1 (PCI Express)
Power on pin 9: configurable 12V (1.5A/port), 5V (1.5A/port), or no power (RI)
Indicators: per-port LED activity indicators
Form factor: low-profile compatible
Product colour: Black
Weight: 0.06 kg
Compatibility: Windows and Linux
How to use
Install the card into an available PCIe x1 slot in the desktop or SFF system following standard ESD precautions. Set the DIP switches on the board to select the desired mode (RS-232, RS-422, or RS-485) for each DB9 port. Configure the power jumper to supply 12V, 5V, or no power on pin 9 as required by your connected devices. Secure the card with the appropriate bracket (low-profile or standard) and connect serial peripherals using DB9 cables. Install any required drivers for your operating system (Windows or Linux) and verify port activity using the LED indicators.
Usage recommendations
Use shielded DB9 cables for improved signal integrity and enable the appropriate termination and biasing when using RS-422/RS-485 networks. Confirm device voltage and power requirements before enabling pin 9 power to prevent damage. For mixed serial environments, verify DIP switch settings per port and test communication at the intended baud rate prior to deployment.

## Specifications

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 80 |
| Storage temperature (T-T) | -20 - 80 |
| Operating temperature (T-T) | 0 - 70 |

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |
| Compliance certificates | RoHS, Trade Agreements Act (TAA) |

### 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 |
|---|---|
| Cable length | 0.3 m |
| Electrostatic Discharge (ESD) protection | 15 kV |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.06 kg |
| Package weight | 273.2 g |
| Height | 16 mm |
| Width | 109 mm |
| Depth | 121 mm |

### System requirements

| Feature | Value |
|---|---|
| Windows operating systems supported | Windows 7 Ultimate, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Home Basic x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 11 Enterprise x64, Windows 7 Home Basic, Windows 7 Enterprise x64, Windows 7 Enterprise, Windows 7, Windows 11 x64, Windows 11 Pro, Windows 11 Home, Windows 10 Pro, Windows 8.1 Enterprise, Windows 8.1 x64, Windows 8.1 Pro x64, Windows 8.1 Pro, Windows 8.1 Enterprise x64, Windows 7 Ultimate x64, Windows 8.1, Windows 8 x64, Windows 8 Pro x64, Windows 8 Pro, Windows 8 Enterprise x64, Windows 8 Enterprise, Windows 8, Windows 7 x64, Windows 11, Windows 10 x64, Windows 10 Pro x64, Windows 10 IoT Enterprise, Windows 10 IOT Core, Windows 10 Home x64, Windows 10 Home, Windows 10 Enterprise x64, Windows 10 Enterprise, Windows 10 Education x64, Windows 10 Education, Windows 10, Windows 11 Enterprise |
| Linux operating systems supported | Y |
| Server operating systems supported | Windows Server 2022, Windows Server 2019, Windows Server 2016 |

### Design

| Feature | Value |
|---|---|
| Internal | Yes |
| Product colour | Black |

### Performance

| Feature | Value |
|---|---|
| Chipset | ASIX - AX99100 |
| LED indicators | Activity |

### Logistics data

| Feature | Value |
|---|---|
| Master (outer) case height | 306 mm |
| Master (outer) case width | 685 mm |
| Master (outer) case length | 345 mm |
| Products per master (outer) case | 50 pc(s) |

### Packaging data

| Feature | Value |
|---|---|
| Cables included | Ribbon cable |
| Package depth | 207 mm |
| Package height | 38 mm |
| Package width | 144 mm |
| User guide | Yes |
| Mounting brackets included | Yes |

### Features

| Feature | Value |
|---|---|
| Flow control support | Yes |
| Baud rate | 921.6 Kbit/s |
| Data bits | 5, 6, 8, 9 |
| Stop bits | 1, 1.5, 2 |
| Parity bit | Even, Mark, N, Odd, Space |
| FIFO (First In, First Out) | 256 |

## FAQ

### How much does the 4-Port Serial PCIe Card StarTech.com PS74ADF-SERIAL-CARD cost, and is it available for purchase?

The price is 199.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can 4-Port Serial PCIe Card StarTech.com PS74ADF-SERIAL-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: host interface, weight, internal, output interface, product colour, 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 4-Port Serial PCIe Card StarTech.com PS74ADF-SERIAL-CARD?

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.

## Image

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