Features:
USB Type-C PD Chargers
USB Type-A Chargers
Multi-Port USB Chargers
Integration-Ready Charging PCBAs
RS-232 | RS-422 | RS-485 | 512 Bytes Receive | 512 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable…
Model# USBG-COMi-M
$87.49In stock
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RS-232 | 128 Bytes Receive | 384 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter…
Model# USBG-2COM-M
$103.29Not in stock - Backorder allowed
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RS-232 | 512 Bytes Receive | 512 Bytes Transmit | FTDI Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the…
Model# USBG-COM-M
$46.49In stock
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RS-232 | FTDI Expand Your Serial Capabilities: Connect your legacy 9-pin serial devices through a USB-A port to add legacy functionality to newer technologies with…
Model# CG-4X232FTDI
$103.99In stock
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RS-232 | 384 Bytes Receive | 128 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with optional mountable flanges, the serial adapter…
Model# USB2-4COM-M
$117.49In 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 | 512 Bytes Receive | 512 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter…
Model# USBG-COM-SI-M
$114.99In stock
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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
$422.99In stock
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RS-422 | RS-485 | 384 Bytes Receive | 128 Bytes Transmit Superior Build Quality: Housed in a rugged steel chassis with optional mountable flanges, the…
Model# USBG-2COMi-SI-M
$221.99In stock
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Out of stock
USB to RS232 Adapter - DB9 Male Ports The USBG-BAY4 is a 4 port DB-9 RS232 to USB serial adapter that is designed for PC,…
Model# USBG-BAY4
$147.49Out of 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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RS-232 | 128 Bytes Receive | 384 Bytes Transmit | FTDI Expand Your Serial Capabilities: Connect 8 legacy 9-pin serial devices through a USB-A port…
Model# USB-8COM
$209.49In stock
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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# USBG-8COM-M
$209.99In stock
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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
$491.99In stock
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RS-232 | 128 Bytes Receive | 384 Bytes Transmit | FTDI Expand Your Serial Capabilities: Connect 4 legacy 9-pin serial devices through a USB-A port…
Model# USB-4COM
$116.29In stock
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USB to RS485 DIN Rail Mount The USB-16COMi-RM is an Isolated USB to 16 Port COM Serial Adapter for RS-232 422/485 communication devices. Includes rack…
Model# USB-16COMi-RM
$758.99Not in stock - Backorder allowed
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RS485 to USB Adapter Auto Transmit A 4-Port RS-422, RS-485 adapter for serial communication that utilizes four external DIP switches for easy access to the signal…
Model# USB-4COMi-M
$211.99In stock
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Serial to USB Multi-Protocol Adapter This 2-Port serial adapter supports the use of one or two serial protocols simultaneously making it very versatile for many…
Model# CG-232485CBO
$106.99Not in stock - Backorder allowed
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USB to RS232 Adapter - 2500Vrms Isolation Industrial 8-Port DB-9 RS232 to USB Adapter to add eight new or additional serial devices to your system.…
Model# CM-41082
$430.29In stock
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RS232 to Ethernet - Two Port Adapter The MSD-SRF2X Dual port RS-232 to Ethernet data gateway will address the need to add 2 RS-232C devices…
Model# MSD-SRF2XM
$197.99In stock
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CAN Bus from your Serial RS-232 Port The Serial RS-232 CAN Bus adapter connects to your computer's DB-9 serial port to create the CAN Bus…
Model# CG-1P232CAN
$137.49In 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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RS-485 Half Duplex Serial Adapter The USB-8COMi-M allows you to add 8 USB to RS-422 or RS-485 serial ports by connecting to a host USB port. Constructed from…
Model# USB-8COMi-M
$333.99In 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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The MSD-SRF4XV2 provides seamless connectivity for RS-232, RS-422, and RS-485 serial devices over Ethernet, making it ideal for integrating PLCs, meters, sensors, and other legacy…
Model# MSD-SRF4XV2
$249.95Not in stock - Backorder allowed
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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.