Industrial USB to Serial Adapters | RS232 RS422 RS485 | COM Port Retention

Serial to USB

Rugged Serial Adapters | Integrated COM Retention

Connect legacy serial devices to modern USB-C/A systems without software reconfiguration. Our industrial adapters feature COM Port Retention to preserve assignments across reboots and disconnects. Powered by genuine FTDI chipsets, Coolgear ensures rock-solid driver stability and ESD surge protection for high-stakes environments.

Serial Frequently Asked Questions

Common Applications:

• PLC & CNC Networking: Optical isolation stops ground loops and voltage spikes.
• SCADA & Oil/Gas: Reliable long-range data for RS-422/485 infrastructure.
• Retail & POS: Stable, high-uptime connections for high-traffic peripherals.
• Medical & Lab: Noise-free interfacing for sensitive sensors and legacy gear.

RS-232

RS-422

RS-485

Multi-Standard Series

CAN BUS

Serial Over Ethernet

USB to Industrial 5Volt RS232 Serial Adapter FTDI

USB to Serial Adapter for Bar code Scanners The USBG-COM-X is compact, (only slightly longer than a pen cap) and adds a USB to industrial…

Model# USB-COMPlus

$34.49

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Single Port USB to RS-422 485 Hi-Speed Industrial Adapter

RS485 Serial Adapter for Factory Automation Adapting to new technology, the USB-COMi-TB USB to Industrial Single RS-422/485 Adapter is designed to take industrial serial communication port expansion…

Model# USB-COMi-TB

$73.99

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FAQ: Common USB to Serial Adapter Questions

Q: What is COM Port Retention and why do I need it?
A: 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.

Q: Can I use these adapters with Windows 11?
A: Yes, all Coolgear Serial adapters use modern FTDI or Silabs chipsets with WHQL-certified drivers for full Windows 11, Mac, and Linux support.

Q: What is the difference between an isolated and non-isolated serial adapter?
A: 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.

Q: Do these adapters require an external power supply?
A: 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.