USB 2.0 to 4-Port RS-232 Serial Adapter
Industrial-grade FTDI chipset | Up to 230400bps | ±15kV ESD protection
Official FTDI Driver Package
Download the latest drivers for Windows, Linux, Mac OS X & Android
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Key Features
- ✅ Genuine FTDI Chipset – Maximum compatibility and stability
- ⚡ High-Speed Transfer – USB 2.0 (480Mbps) with serial rates up to 230400bps
- 🛡️ Industrial Protection – ±15kV ESD protection, -40°C to 85°C operating range
- 🔄 Automatic Control – Auto handshake and direction detection
- 💡 LED Indicators – Real-time data activity monitoring per port
- 🔌 Flexible Power – USB bus powered or optional DC 5V / 9-36V
- 🌐 Universal OS Support – Windows, Linux, Mac OS X, Android
Technical Specifications
| Model | IO-U24232C-4S |
| Chipset | FTDI (Genuine) |
| Interface | USB Type-B → 4 × DB9 Male (RS-232) |
| Data Rate | 300 - 230400 bps (Auto Detection) |
| Signals | CD, RXD, TXD, DTR, GND, DSR, RTS, CTS, RI |
| Flow Control | None / Hardware / Software (XON/XOFF) |
| Protection | ±15kV ESD |
| Temperature | -40°C to 85°C |
| Power | USB / DC 5V / 9-36V Terminal |
| Dimensions | 200.5 × 114 × 28.2 mm |
Applications
- POS Systems – Receipt printers, cash drawers, barcode scanners
- Industrial Automation – PLCs, instrumentation, control modules
- Networking – Routers, switches, console management
- Data Acquisition – Sensors, measurement devices
- Legacy Integration – Older serial equipment to modern PCs
- Server Management – Remote administration, KVM switches
System Compatibility
XP / 7 / 8 / 10 / 11
Kernel 2.4+
10.6+
With OTG
Package Contents
- 1 × USB 2.0 to 4-Port RS-232 Adapter (IO-U24232C-4S)
- 1 × USB Type-A to Type-B Cable (1.5m)
- 1 × Power Adapter (DC 5V)
- 1 × User Manual
❓ Frequently Asked Questions
Q: Do I need to install drivers for this adapter?
A: For Windows 10/11, Mac OS X, and most Linux distributions, drivers are automatically installed. However, we recommend downloading the FTDI driver package (link above) for optimal performance and compatibility with older operating systems like Windows XP/7/8.
Q: Can I use all 4 ports simultaneously?
A: Yes! All 4 RS-232 ports operate independently and can be used at the same time. Each port is assigned a separate COM port number and can be configured with different baud rates and settings.
Q: What's the maximum cable length I can use?
A: The USB cable should be under 5 meters for reliable data transmission. For RS-232 connections, you can extend up to 5 meters from the adapter to your serial device. For longer distances, consider using RS-232 repeaters or converters.
Q: Is this adapter compatible with RS-485 or RS-422 devices?
A: No, this adapter is designed specifically for RS-232 serial communication. RS-485 and RS-422 use different voltage levels and signaling. If you need RS-485/422 connectivity, please check our other adapter models.
Q: Do I need external power for this adapter?
A: Most applications work fine with USB bus power alone. External power (DC 5V or 9-36V) is only needed if your serial devices draw significant current or if you're experiencing power-related issues. The included power adapter provides this option.
Q: Why choose FTDI chipset over cheaper alternatives?
A: Genuine FTDI chipsets offer superior driver support, better stability, and wider OS compatibility compared to clone chips. FTDI drivers are maintained and updated regularly, ensuring long-term reliability for industrial and commercial applications.
Q: What do the LED indicators show?
A: The LED indicators light up to show data transmission activity on each port. When data is being sent or received, the corresponding LED will flash, making it easy to troubleshoot connection issues at a glance.
Q: Can this work with virtual machines (VMware, VirtualBox)?
A: Yes, the adapter works with virtual machines. You'll need to configure USB passthrough in your VM settings to allow the guest OS to access the USB serial adapter. FTDI drivers should then be installed within the VM.
Q: What warranty and support do you offer?
A: All Lekuo products come with a 1-year manufacturer warranty covering defects in materials and workmanship. Our technical support team is available to assist with installation, configuration, and troubleshooting questions.
Why Choose Lekuo?
Professional-grade connectivity solutions with genuine FTDI chipsets, rigorous quality control, and comprehensive OS support. Engineered for reliability in industrial and commercial environments.