Features:
USB Type-C PD Chargers
USB Type-A Chargers
Multi-Port USB Chargers
Integration-Ready Charging PCBAs
$70.49
Expected Availability Date: November 9, 2026
Not in stock - Backorder allowed
The USB-COMiPLUS USB 2.0 Industrial Adapter allows you to add one RS-232, RS-422 or RS-485 serial port by connecting to a USB port. The upper case on the device slides open for adjusting the mode settings from RS-232, RS-422, RS-485, the device is user selectable. Once the drivers are installed and the device is plugged in, it will be installed as a standard COM port on your computer.
OS Support:
| Power | Bus Power Support: N – External Power Required |
|---|---|
| Compliance | Country of Origin: Taiwan Certifications: TAA, CE, FCC, REACH, RoHS |
| Physical Characteristics | Color: Black, White Ports: 1 Serial Port Material of Construction: Plastic Screw Lock Compatible: Yes |
| Serial Attributes | RS Signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND Serial Standards: RS232, RS422, RS485 FIFO Receive: 384 bytes FIFO Transmit: 128 bytes Data Bits: 5, 6, 7, 8 Serial Parity: None, Even, Odd, Mark, Space Stop Bits: 1, 1.5, 2 Flow Control: Hardware (RTS, CTS), XON/XOFF Serial Port qty: 1 |
| Software | OS Support / Compatibility: Windows 11, Windows 10, Windows 8, Windows 7, Windows Vista, Mac OS, Linux |
| Environmental | Operating Temperature Range: 0C ~ 55C Storage Temperature: -20C ~ 75C Humidity: 5% to 95% RH |
| Product Information | Warranty: One Year |
| Hardware | Chipset: FTDI LED Indicators: Power, TX / RX Upstream Port Types: 1 Type-A Male USB |
| Performance & Safety | ESD Protection: 15kV Isolated: Yes Max Data Transfer Rate: 480Mbps |
| Additional Details | UPC: 729440690953 Chip Model: FT232RL, MAX3089E, ZT213LFEA Connector: DB9 Male w/ Nuts USB Specification: USB 2.0 (480Mbps) Weight: 0.4000 lbs Dimensions: 4 × 4 × 2.25 in |





The USB 2.0 to RS232/422/485 selectable adapter has certain accessories that work with it. These accessories are what you can order if needed.
Model# 9DBMF5FT
$2.99Out of stock
View frequently asked product questions below. For all serial troubleshooting, visit this page.
Still need help? Reach out!
Most of our single and dual-port models are USB bus-powered. High-density rackmount models (8-port+) feature integrated or external power supplies for maximum signal integrity.
Isolated adapters use optical barriers to physically separate the electrical signals. This protects your computer from 2,500V surges and ground loops common in factory environments.
Yes, all Coolgear Serial adapters use modern FTDI or Silabs chipsets with WHQL-certified drivers for full Windows 11, Mac, and Linux support.
COM Port Retention ensures that your assigned COM port number remains the same every time you plug in the adapter or reboot your PC. This prevents software communication errors and eliminates the need to manually reconfigure your application settings whenever hardware is moved.
Test your components by:
When testing cables:
When testing serial ports and devices:
Note: You are required to restart your computer after disabling the Driver Signature Enforcement. Save all open work on your computer.
Disable driver signature enforcement:
When your system restarts:
When your computer restarts, Driver Signature Enforcement will be disabled and you can install the drivers.