Features:
USB Type-C PD Chargers
USB Type-A Chargers
Multi-Port USB Chargers
Integration-Ready Charging PCBAs
Expand Your Serial Capabilities: Connect your legacy serial device through a USB-A port to add legacy functionality to newer technologies with no serial port connections.…
Model# USB-232TTLMOS-IS
$58.99In stock
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RS-232 | RS-422 | RS-485 | 384 Bytes Receive | 128 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable…
Model# USB-COMi-SI-M
$138.99In stock
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RS-232 | RS-422 | RS-485 | 2,000 Bytes Receive | 2,000 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable…
Model# USB2-4COMi-SI-TB
$269.29Not in stock - Backorder allowed
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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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USB to RS232 TTL Cable Adapter The new USB to RS232 TTL adapter allows you to control your voltage setting as you need whether 3.3V…
Model# USB-232TTLMOS
$45.99In 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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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
$73.99In stock
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Passive RS232 to RS485 Converter RS232 to RS485 terminal block passive converter to operate in full or half-duplex capacity. Use this compact light weight molded…
Model# US-485TBP
$22.99Out of Stock
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Adds one RS-232, or RS-422, or RS-485 serial port via USB connection. Software configuration for easy RS-232, RS-422, RS-485 mode settings. Remote Serial Port Sharing:…
Model# USB-COMi-PRO
$107.99Out of Stock
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Terminal Block Connector - Mini Serial RS232 This DB9 to Terminal is designed to convert the RS422/485 signals in a Micro sized package. The iSerial-TB5 DB9-Female…
Model# iSerial-TB5
$23.29Out of 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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RS-232 | RS-422 | RS-485 Safe Connections: Designed for use with Bar Code Scanners, Time Clocks, Label Printers, Point of Sale Terminals, Receipt Printers, and…
Model# CG-USBISOCOM-PRO
$142.49In 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.