USB to RS232 / RS485 / RS422 / TTL / Serial / Ethernet Converters

With our high-quality, high-performance USB to RS232 / RS485 / RS422 / TTL serial and Ethernet converters that use only top-quality chipsets such as FTDI and Silicon Labs, USB signals are converted seamlessly into RS232, RS485, RS422, TTL, serial and Ethernet signals. Pick from our menu of industrial or commercial-grade devices confidently, knowing that you will get nothing but the best from CommFront.

For the past decade, CommFront has built a reputation as a major supplier of rugged and reliable, yet simple, data communication products and solutions. Our USB to RS232 / RS485 / RS422 / TTL serial and Ethernet converters were strictly certified by SGS / TUV (the Nationally Recognized Testing Laboratories [NRTLs] in North America (approved by OSHA) and the Notified Bodies in the European Union. CommFront's product quality is ensured by our ISO 9001:2008 quality control system and we back our high-quality USB converter products with a 30-day risk-free money-back guarantee and a 5-year replacement warranty. Learn more »


USB-Serial-3

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

  • Industrial 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.
  • 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.

$119.95

In Stock


USB-232-1

USB to RS232 Adapter / Converter

  • USB to RS232 adapter / converter.
  • Adds one RS-232 port to your USB port.
  • 300 to 128K Baud operation (auto-sensing and self-adjusting).
  • RS-232 data & signals: TX, RX, RTS, CTS, DTR, DSR, DCD, RI, and GND..
  • Supports Windows 10, Windows 8, Windows 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10, Windows 8, Windows 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Port-powered, no external power required.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by SGS (Cert No. EM/2008/20060C; EM/2008/20061C).
  • 5-year manufacturer's warranty.

$29.95

In Stock


USB-232A-1

USB to Dual RS232 Adapter / Converter

     
  • USB to dual RS232 adapter / converter.
  • Adds two RS-232 ports to your USB port.
  • 300 to 128K Baud operation (auto-sensing and self-adjusting).
  • RS-232 data & signals: TX, RX, RTS, CTS, DTR, DSR, DCD, RI, and GND.
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by SGS (Cert No. EM/2008/20062C, EM/2008/20063C).
  • 5-year manufacturer's warranty.

$39.95

In Stock


USB-485-1

USB to 2-Wire RS485 Adapter / Converter

  • USB to 2-wire RS485 adapter / converter.
  • Adds one RS-485 port to your USB port.
  • Communicate with one loop of up to 256 units of RS485 devices.
  • 300 to 3M Baud operation (auto-sensing and self-adjusting).
  • Built-in selectable 120Ω end-of-line terminator for system reliability and easy installation.
  • Built-in 15kV ESD static and circuit protection.
  • Data direction auto-turnaround, no flow control is required.
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by world-class lab SGS / TUV (Cert No. E1/2013/90010C; E1/2013/90011C).
  • 5-year manufacturer's warranty.

$37.95

In Stock


USB-422-1

USB to 4-Wire RS422 / RS485 Adapter / Converter

  • USB to RS422/RS485 adapter / converter.
  • Adds one 4-wire RS-422 / RS-485 port to your USB port.
  • 300 to 3M Baud operation (auto-sensing and self-adjusting).
  • Communicate with one loop of up to 256 units of RS422 / RS485 devices.
  • Built-in selectable 120Ω end-of-line terminator for system reliability and easy installation.
  • Built-in 15kV ESD static and circuit protection.
  • The full-duplex USB to full-duplex RS-422 / RS-485 communications requires no data direction auto-turnaround and flow control.
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by world-class lab SGS / TUV (Cert No. E1/2013/90006C; E1/2013/90007C).
  • 5-year manufacturer's warranty.

$37.95

In Stock


USB-232-1+TTL-232-1

USB to TTL Converter

  • USB to TTL converter.
  • Adds one TTL port to your USB port.
  • 300 to 115.2K Baud operation (auto-sensing and self-adjusting).
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by world-class lab SGS / TUV (Cert No. EM/2008/20060C, EM/2008/20061C, SG-CE-090012).
  • 5-year manufacturer's warranty.

$62.95

In Stock


USB-232-1+TTL33-232-1

USB to TTL 3.3V Converter

  • USB to TTL 3.3V converter.
  • Adds one TTL 3.3v port to your USB port.
  • 300 to 115.2K Baud operation (auto-sensing and self-adjusting).
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by world-class lab SGS / TUV (Cert No. EM/2008/20060C, EM/2008/20061C, SG-CE-090012).
  • 5-year manufacturer's warranty.

$62.95

In Stock


USB-232A-1+2xTTL-232-1

USB to Dual TTL Converter

  • USB to dual TTL converter.
  • Adds two TTL ports to your USB port.
  • 300 to 115.2K Baud operation (auto-sensing and self-adjusting).
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by world-class lab SGS / TUV (Cert No. EM/2008/20062C, EM/2008/20063C, SG-CE-090012).
  • 5-year manufacturer's warranty.

$105.95

In Stock


USB-232A-1+2xTTL33-232-1

USB to Dual TTL 3.3V Converter

  • USB to dual TTL 3.3V converter.
  • Adds two TTL 3.3v ports to your USB port.
  • 300 to 115.2K Baud operation (auto-sensing and self-adjusting).
  • Supports Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 / 2000 / 98 (32-bit), Windows 10 / 8 / 7 / Vista / XP / Server2008 / Server2003 (64-bit), Win CE, Mac, and Linux.
  • Supports remote wakeup and power management.
  • Plug and play (hot-pluggable, data format auto-sensing and self-adjusting).
  • Port-powered, no external power required.
  • No IRQs required, no IRQ conflicts.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by world-class lab SGS / TUV (Cert No. EM/2008/20062C, EM/2008/20063C, SG-CE-090012).
  • 5-year manufacturer's warranty.

$105.95

In Stock


USB30-ETH-1

USB 3.0 to Gigabit Ethernet Converter

  • USB 3.0 to Gigabit Ethernet converter.
  • Backward compatible with USB 1.1 and USB 2.0.
  • Supports USB Super / High / Full / Low Speed modes with bus power.
  • Complies with the Energy-Efficient Ethernet standard (IEEE 802.3az).
  • Supports dynamic cable length detection and dynamic power adjustment Green Ethernet (Gigabit mode only).
  • Complies with IEEE 802.3, 802.3u, and 802.3ab standards.
  • Supports full duplex operation with IEEE 802.3x flow control.
  • Supports IPv4 / IPv6 packet Checksum Offload Engine (COE) to reduce CPU loading.
  • Supports suspend mode and remote wakeup.
  • Supports Windows 10 / 8 / 7 / Vista / XP / 2000, WinCE / Mobile, Linux, and Mac OS v10.6 or later.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by SGS (Cert no. EM/2014/C0046C; EM/2014/C0047C).
  • 5-year manufacturer's warranty.

$47.95

In Stock