---
product_id: 2183618
title: "2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Dual Serial DB9 Ports with Low Profile Bracket"
brand: "io crest"
price: "$32.27"
currency: USD
in_stock: true
reviews_count: 13
url: https://www.desertcart.us/products/2183618-2-port-pci-express-rs232-serial-adapter-card-pcie-rs232
store_origin: US
region: United States of America
---

# 16Mbps max speed Dual RS232 DB9 ports PCIe x1 slot compatible 2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Dual Serial DB9 Ports with Low Profile Bracket

**Brand:** io crest
**Price:** $32.27
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your legacy gear with lightning-fast dual serial ports!

## Quick Answers

- **What is this?** 2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Dual Serial DB9 Ports with Low Profile Bracket by io crest
- **How much does it cost?** $32.27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2183618-2-port-pci-express-rs232-serial-adapter-card-pcie-rs232)

## Best For

- io crest enthusiasts

## Why This Product

- Trusted io crest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual-Port Powerhouse:** Add two reliable RS232 DB9 serial connections instantly.
- • **Flexible Installation:** Includes low profile bracket for any PC chassis setup.
- • **Robust PCIe Compliance:** Built to PCI Express 1.0a standards for stable, high-performance operation.
- • **Universal Compatibility:** Works flawlessly with Windows and Linux systems.
- • **Blazing Fast Serial Speeds:** Experience up to 16Mbps per port for seamless data flow.

## Overview

The IO CREST SI-PEX15037 is a PCI Express x1 serial adapter card that adds two RS232 DB9 ports to your desktop. Supporting speeds up to 16Mbps and compatible with Windows and Linux, it includes a low profile bracket for versatile installation in any PC case. Fully compliant with PCIe 1.0a standards, this card ensures reliable, high-speed serial communication for professional and industrial applications.

## Description

Add 2 RS-232 DB9 serial ports to your full height or low profile computer through a PCI Express X1 slot with IOCrest SI-PEX15037 PCI-Express X2 serial controller card. The RS232 serial adapter card is compatible with a broad range of operating systems, including Windows and Linux (kernel 2.6.11 and up). plus, the adapter card includes an optional half-height/low profile bracket that allows the card to be installed in virtually any computer case.

## Features

- Fully compliant with PCI-E base Specification, Revision 1.0A
- Support for D1, D2, D3hot and D3cold
- Utilizes 100-MHz Differential PCI-E common reference Clock
- 2 16C450/550/extended 550 compatible UART
- Bi-directional speeds from 50bps to 16Mbps/port
- Fully Compliant with PCI-e Base Specification, Revision 1.0a
- Support for D1, D2, D3hot and D3cold
- Utilizes 100-Mhz Differential PCI-e Common Reference Clock
- Custom BAUD Rates Supported with External Clock or by Programming Internal PLL
- 5, 6, 7, 8 and 9-bit Serial Format Support
- Support MODEM Signals CTS, DSR, RI, DCD, the DTR, RTS, Convert RS232 Level

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Graphics Coprocessor | AMD FirePro 2270 |
| Chipset Brand | AMD |
| Brand | IO CREST |
| Series | SI-PEX15037 |
| Item model number | SI-PEX15037 |
| Operating System | Linux |
| Item Weight | 4.2 ounces |
| Product Dimensions | 7 x 5.5 x 1.5 inches |
| Item Dimensions  LxWxH | 7 x 5.5 x 1.5 inches |
| Manufacturer | Syba |
| ASIN | B00B5L9P36 |
| Is Discontinued By Manufacturer | No |
| Date First Available | January 25, 2013 |

## Product Details

- **Brand:** IO CREST
- **Hardware Interface:** PCI Express x1
- **Style:** Double Serial DB9 Port PCIe x1
- **Compatible Devices:** Desktop
- **UPC:** 810154016945

## Images

![2-Port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller to Dual Serial DB9 Ports with Low Profile Bracket - Image 1](https://m.media-amazon.com/images/I/61+0uOgJANL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Serial Adapter Works Well
  

*by A***R on Reviewed in the United States on October 14, 2021*

The serial interface card was installed in a PC running Windows 10 Home 32 bit.  The installation of the card took just a few minutes.  I did find it necessary to install it in the first available PCIe x1 slot.  Installing it in the second empty PCIe x1 slot didn't work.  That is not an unusual thing to encounter with some interface cards.It took a little while to find the proper setup file on the provided mini-CD because the documentation is outdated and points to a non-existent file.  However, once I figured out which setup file to use the installation went quickly and the serial port card appeared in the device manager.  Configuring the two new serial ports the card provided took only a minute.The serial card is being used to communicate with an older computer controlled amateur radio HF transceiver.  There have been no problems and it is working properly.  I was pleased with the overall value of the card.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Worked Perfectly.  No Hassles
  

*by B***Y on Reviewed in the United States on October 25, 2015*

Worked perfectly from the start.  True plug-and-play.  Installed the card in a PCIe slot (this one was a x16, but size of PCIe slot does not matter.)  The two serial ports on the card showed up as PCIe COM ports, but the driver was not installed.  I inserted the driver CD that comes with the card, went to the folder indicated in the instructions; ran the setup application; and that is all it took.  The right drivers were installed successfully; ;the card COM ports received port numbers (COM2 and COM3); and they started working flawlessly.A fairly inexpensive card that works perfectly fine.  Using Windows 7 Pro, 64-bit.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Windows 10 install semi-automatic
  

*by M***F on Reviewed in the United States on December 9, 2023*

1. Install the hardware 2. Turn on the Computer. 3. Put install CD into Drive ...D?.... 4. (Search for) Open the Device Manager.  5. Look for the Items with the Triangles over them. 6 Click on one of those items. 7. Click on Install Driver. 8. Specify to look for the driver in the computer on the CD Drive...D?.... 9. watch the driver install.... repeat this process for 2nd Item with triangle in device manager.It takes two driver installs per serial port to get both ports to be operational... Observe that both triangles are gone and the ports are listed, typically as Com 3 and Com 4Just don't tell anybody you got these tips in a review....

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-21*