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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RS232 Male to Female Serial Data Cable Complete your serial data connection with this 5ft. RS232 DB-9 Male to Female data cable for fast reliable…
Model# 9DBMF5FT
$2.99In stock
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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
$706.49Not in stock - Backorder allowed
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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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USB to RS232 Cable Windows 11 The USBG-4X2FTDI 4-Port USB DB-9 Serial Adapter is a rugged plastic USB to Serial adapter that allows you to add 4 RS-232…
Model# USBG-4X2FTDI
$79.99In 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.