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USB Type-C PD Chargers
USB Type-A Chargers
Multi-Port USB Chargers
Integration-Ready Charging PCBAs
15KV ESD and 600W Surge Protection for RS-232/422/485 Ports Our series of Industrial USB 2.0 to terminal block serial adapters supports RS-232, RS-422, and RS485…
Model# USB2-8COMi-TB
$325.99In stock
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Optical Isolation and Surge Protection for RS-232/422/485 Ports The USB2-8COMi-SI-TB is a USB 2 to 8-port industrial serial adapter that protects you device(s) with optical…
Model# USB2-8COMi-SI-TB
$434.99In stock
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Terminal block serial adapter for RS-232/422/485 Our series of Industrial USB 2.0 to terminal block serial adapters support RS-232, RS-422, and RS485 and are designed…
Model# USB2-4COMi-TB
$204.29In stock
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RS-232 | 512 Bytes Receive | 512 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter…
Model# CM-41042
$287.29In stock
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USB to RS232 Adapter - FTDI FT232RL Chipset The 4X232P1 USB 2.0 to Quad Serial Adapter features our USB 4-Port serial adapter allows 4 serial…
Model# USBG-4X232P1
$133.29In stock
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USB to RS485 Adapter with Failed Signal Check The USB to RS485 adapter installs automatically once connected to a USB port. When a serial device…
Model# CG-UHS4P485
$179.49In stock
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USB to RS485 2-Port Serial Adapter Support for your existing RS422 and RS485 serial devices doesn't disappear because your new computer doesn't have serial ports. The USB-2COMi-M…
Model# USB-2COMi-M
$206.99In stock
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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.