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

32 Port RS-232 USB-to-Serial Adapter

Serial USB Adapter - Full RS232 Modem Control The USB-32COM-RM USB to 32 Port RS-232 Serial Adapter is designed for industrial applications and harsh environments making serial…

Model# USB-32COM-RM

$706.49

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16-Port Industrial RS232 to USB 2.0 Hi-Speed Serial Adapter

RS-232 | 512 Bytes Receive | 512 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with optional mountable flanges, the serial adapter hub…

Model# CG-16COM-MINI

$422.99

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8 Port USB to RS-232/422/485 Octal Adapter

FTDI USB to Serial Adapter with Switching Power Supply Industrial Grade Rack Mount 8 Port USB RS-232, RS-422, RS485 Octal Serial Adapter with Metal Case and Built-In…

Model# USB-8COMi-RM

$439.99

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16 Port RS-232 Rack Mountable USB to Serial Adapter

USB to Serial Adapter - DIN Rail Mount The USB-16COM-RM is a 16 Port RS-232 industrial style USB to Serial adapter, which allows the use of sixteen…

Model# USB-16COM-RM

$491.99

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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.