• M.2 to dual DB9 RS232 serial controller card front view
  • DB9 RS232 serial ports on M.2 controller card
  • M.2 RS232 serial controller card with EXAR chipset detail view
  • Compact M.2 serial controller card dimensions
  • M.2 serial controller card installation in computer slot
1 5

Lekuo M.2 to 2‑Port DB9 RS‑232 Serial Controller Card – Add 2 COM Ports for Embedded

Lekuo M.2 to 2‑Port DB9 RS‑232 Serial Controller Card – Add 2 COM Ports for Embedded

$42.98 USD
$55.13 USD $42.98 USD
Sale Sold out
Taxes included.

IO-ADA15069
View full details

Product Description

🔌 Professional M.2 to Dual RS232 Serial Controller

Reliable connectivity solution featuring EXAR 17V352 chipset with 256-byte FIFO buffers

💼 Ideal for: Automation systems • Embedded computing • POS terminals • CNC machinery • Legacy equipment integration

📋 Technical Specifications

Model IO-ADA15069
Chipset EXAR 17V352
Interface M.2 (Key M or B, PCIe 2.0 Gen 1)
Serial Ports 2 × DB9 male connectors (RS-232)
Data Transfer Rate 300 bps to 921.6 kbps
UART 16550 compatible, 256-byte TX/RX buffers
Supported Signals DCD, RXD, TXD, DTR, GND, DSR, RTS, CTS, RI
Data Bits 4, 5, 6, 7, 8 bits
Stop Bits 1, 1.5, 2 bits
Parity Odd, Even, None, Mark, Space
Flow Control None, Software (Xon/Xoff), Hardware
Operating Temp -40°C to +85°C
Storage Temp -65°C to +150°C
Dimensions 80 × 22 mm

💻 System Compatibility

🪟 Windows
XP, Vista, 7, 8, 8.1, 10
Server 2003–2019
🐧 Linux
Kernel 2.6.27+
3.x.x and newer
🔧 Requirements
One free M.2 slot
(Key M or B, PCIe)

📦 Package Contents

  • ✅ 1 × M.2 to 2-Port RS232 Card
  • ✅ 1 × User Manual
  • ✅ 2 × Low Profile Brackets

⬇️ Driver Download

Latest EXAR 352/354/358 driver package

Download Driver

⚡ Key Features

  • High-Speed PCIe: 2.0 Gen 1 compliant (x1 link, 2.5 Gbps dual simplex)
  • Enhanced FIFO: 16550 compatible with 256-byte TX/RX buffers
  • Flexible I/O: 16 multi-purpose I/O pins (MPIOs)
  • Efficient Operation: 32-bit data read/write support
  • Dual UART: Global interrupt status register for both channels
  • Wide Temperature Range: -40°C to +85°C operating temperature

🎯 Perfect for: Automation systems • POS terminals • CNC machinery • Embedded computing • Legacy equipment integration • Any application requiring reliable RS-232 serial communication

❓ Frequently Asked Questions

🔧 What M.2 slot types are compatible with this card?

This card is compatible with M.2 slots that support Key M or Key B configurations based on PCIe interface. It requires a PCIe 2.0 Gen 1 (x1 link) slot. Please verify your motherboard has an available M.2 slot with PCIe support before purchasing.

💿 Do I need to install drivers?

Yes, drivers are required for proper operation.

📏 Will this card fit in a low-profile case?

Yes! The package includes 2 low-profile brackets, making this card suitable for both standard and low-profile PC cases. The card dimensions are 80 × 22 mm, which is the standard M.2 2280 form factor.

⚡ What is the maximum baud rate supported?

The card supports data transfer rates from 300 bps up to 921.6 kbps (921,600 baud). This covers all standard RS-232 communication speeds and is suitable for most serial device applications.

🔌 Can both serial ports be used simultaneously?

Absolutely! Both DB9 RS-232 ports are independent and can operate simultaneously at full speed. Each port has its own dedicated UART channel with 256-byte FIFO buffers, ensuring reliable concurrent operation.

🌡️ Can this card operate in extreme temperatures?

The card has an operating temperature range of -40°C to +85°C, making it suitable for demanding environments. Storage temperature range is -65°C to +150°C. This makes it ideal for embedded systems and applications in non-climate-controlled environments.

🖥️ Which COM port numbers will be assigned?

COM port numbers are assigned automatically by your operating system during driver installation. The specific port numbers depend on what COM ports are already in use on your system. You can view and configure port assignments in Device Manager (Windows) or through terminal commands (Linux).