USB / RS232 / RS485 / RS422 Opto Isolators

USB has now moved from the desktop to more challenging environments, including instrumentation, point of sales, factory & building automation, etc. With our rugged, industrial-grade USB isolators and USB to RS232 / RS485 / RS422 optically-isolated converters, we ensure that your assets are well protected from unexpected events.




CommFront products are strictly certified by SGS and/or TUV - the Nationally Recognized Testing Laboratories [NRTLs] in North America (approved by OSHA) and the Notified Bodies in the European Union. Learn More




CommFront products are designed and manufactured to ISO 9001 standards. Our quality control system is strictly certified by SGS (Cert No. SG12/04213). Learn More




CommFront products have been proven to be reliable. We back our high-quality products with a 5-year replacement warranty and a 30-day risk-free money-back guarantee. Learn More


USB Isolator (Industrial)

  • USB 2.0 compatible (backward compatible with USB 1.1).
  • 5000Vrms isolation (per UL 1577) protects your computer from ground loops, transient surges, remote lightning and spikes.
  • Plug and play (hot-pluggable), no software drivers required.
  • Low and full speed data rate: 1.5Mbps and 12Mbps (auto-sensing and self-adjusting).
  • Upstream short-circuit protection and class 3A contact ESD protection.
  • Bus powered for low power-consumption applications, e.g. a keyboard, mouse, or flash drive.
  • External 5VDC (optional) for high power-consumption applications, e.g. a USB scanner or USB printer.
  • Operating temperature: 32ºF to 122ºF (0ºC to 50ºC).
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by SGS (Cert no. E1/2014/C0058C; E1/2014/C0059C).
  • 5-year manufacturer's warranty.


In Stock


Opto-Isolated USB to RS232 / RS485 / RS422 Converter (Industrial / Port-Powered)

  • Rugged industrial-grade opto-isolated USB to RS232 / RS485 / RS422 converter.
  • Adds one RS-232, RS-485 or RS-422 port to your USB port.
  • USB port-powered, no external power required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Supports multi-drop RS485 / RS422 networks (up to 128 nodes).
  • 2500V optical isolation.
  • 300 to 115.2K Baud operation (auto-sensing and self-adjusting).
  • Direct DIN-Rail (Rack) or Wall / Panel mounting (stackable).
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Data direction auto-turnaround, no flow control is required.
  • Built-in 120Ω end-of-line terminator for system reliability and easy installation.
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2003 / 2000 (32-bit), Windows 10 / 8 / 7 / Vista (64-bit), Win CE, Mac, and Linux.
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Built-in 600W surge protection, 15kV static protection and circuit protection.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by TUV (Cert No. SG-CE-100004; SG-FCC-100001).
  • 5-year manufacturer's warranty.


In Stock