RS232 / RS485 / RS422 Opto Isolators

From 3-wire to 7-wire RS232 isolators, 2-wire RS485 to 4-wire RS422 / RS485 isolators, and USB isolators to USB / RS232 / RS485 / RS422 optically-isolated converters, CommFront has all the optical isolation devices to protect your assets from the unexpected. If off-the-shelf product does not provide enough security for you, we can even tailor-make the devices, which are customizable right down to the nuts and bolts.

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 RS232 / RS485 / RS422 optical isolators 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 converter and isolator products with a 30-day risk-free money-back guarantee and a 5-year replacement warranty. Learn more »


CVT-232A-3

RS232 Opto-Isolator (3-Wire / Industrial / Port-Powered)

  • Industrial port-powered 3-wire RS232 opto-isolator.
  • 5000V optical isolation.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 300 to 38.4K Baud operation (auto-sensing & self-adjusting).
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • No software drivers, DIP switch or jumper settings required.
  • 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-090012).
  • 5-year manufacturer's warranty.

$35.95

In Stock


CVT-232A-4

High-Speed RS232 Isolator (3-wire / Industrial / 5VDC-Powered)

  • Industrial high-speed 3-wire RS232 opto-isolator
  • External 5V DC powered, no port power from the RS232 port is required.
  • Supports high-speed serial data rates: 300 to 115,200 bps.
  • 5000V optical isolation.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • No software drivers, DIP switch or jumper settings required.
  • 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-090012).
  • 5-year manufacturer's warranty.

$47.95

In Stock


CVT-232B-3

RS232 Opto-Isolator (7-Wire / Industrial / Port-Powered)

  • Industrial port-powered 7-wire RS-232 isolator.
  • 2500V optical isolation.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 300 to 19.2K Baud operation (auto-sensing & self-adjusting).
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • No software drivers, DIP switch or jumper settings required.
  • 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-090012).
  • 5-year manufacturer's warranty.

$59.95

In Stock


RPT-232-3 (works in pair)

Opto-Isolated RS232 Repeater / Extender (Industrial / Port-Powered)

  • Industrial port-powered opto-isolated RS232 repeater / extender.
  • Extend full-duplex RS-232 data over long distance.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 2500V optical isolation.
  • 300 to 28.8K Baud operation (auto-sensing & self-adjusting).
  • Current loop circuit provides better noise immunization.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • No drivers needed. No DIP switch or jumper settings.
  • 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-090012).
  • 5-year manufacturer's warranty.

$27.95

In Stock


CVT-485-3

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

 

  • Industrial port-powered opto-isolated RS232 to RS485 converter.
  • Converts RS232 to 2-wire RS485 and vice versa.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 2500V optical isolation.
  • Supports multi-drop RS485 networks (up to 64 nodes).
  • 1.2K to 57.6K Baud operation (auto-sensing & self-adjusting).
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Accepts external 5V DC regulated power if the port-power is insufficient.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no software drivers or flow control is required.
  • Built-in selectable 120Ω terminator for system reliability and easy installation.
  • Built-in 600W surge protection, 15kV static protection and circuit protection.
  • ALL-IN-ONE rugged terminal block designed for different requirements.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by TUV (Cert No. SG-CE-090012).
  • 5-year manufacturer's warranty.

$64.95

In Stock


CVT-422-3

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

  • Industrial port-powered opto-isolated RS232 to RS422 converter.
  • Converts RS232 to 4-wire RS422 and vice versa.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 2500V optical isolation.
  • Supports multi-drop RS422 networks (up to 64 nodes).
  • 1200 to 38.4K Baud operation (auto-sensing & self-adjusting).
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Accepts external 5VDC regulated power if the port-power is insufficient.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no flow control is required.
  • ALL-IN-ONE rugged terminal block designed for different requirements.
  • Built-in selectable 120Ω terminator for system reliability and easy installation.
  • 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-090012).
  • 5-year manufacturer's warranty.

$64.95

In Stock


CVT-485_422-3

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

  • Industrial port-powered opto-isolated RS232 to RS485 / RS422 converter.
  • Converts RS232 to 2-wire RS485, 4-wire RS485 or 4-wire RS422 and vice versa.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 2500V optical isolation.
  • Supports multi-drop RS485 / RS422 networks (up to 128 nodes).
  • 1.2K to 38.4K Baud operation (auto-sensing & self-adjusting).
  • Temperature range: -40ºF to 185ºF (-40ºC to 85ºC).
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no software drivers or flow control is required.
  • Built-in selectable 120Ω terminator for system reliability and easy installation.
  • Built-in 600W surge protection, 15kV static protection and circuit protection.
  • Accepts external 5VDC regulated power if the port-power is insufficient.
  • ALL-IN-ONE rugged terminal block designed for different requirements.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by TUV (Cert No. SG-CE-090012).
  • 5-year manufacturer's warranty.

$69.95

In Stock


CVT-485_422-3(25)

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

  • 25-pin industrial port-powered opto-isolated RS232 to RS485 / RS422 converter.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 2500V optical isolation effectively protects your RS232 devices from ground loops, transient surges, remote lightning and spikes.
  • Converts 25-pin RS232 to 2-wire RS485 or 4-wire RS485 / RS422 and vice versa.
  • Supports multi-drop RS485 / RS422 networks (up to 64 nodes).
  • 1.2K to 38.4K Baud operation (auto-sensing & self-adjusting).
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no software drivers or flow control is required.
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Built-in surge protection (600W), static protection (15kV), and circuit protection.
  • Built-in selectable 120Ω terminator for system reliability and easy installation.
  • Accepts external 5VDC regulated power if the port-power is insufficient.
  • ALL-IN-ONE rugged terminal block designed for different requirements.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by TUV (Cert No. SG-CE-090012).
  • 5-year manufacturer's warranty.

$69.95

In Stock


CVT-485_422-4

High-Speed Opto-Isolated RS232 to RS485 / RS422 Converter (Industrial)

  • High-speed industrial opto-isolated RS232 to RS485 / RS422 converter.
  • Converts RS232 to 2-wire RS485, 4-wire RS485 or 4-wire RS422 and vice versa.
  • External 9-30VDC powered (included), no port power from the RS232 port required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 2500V optical isolation.
  • Supports multi-drop RS485 / RS422 networks (up to 128 nodes).
  • Direct DIN-Rail (Rack) or Wall / Panel mounting.
  • 300 to 115.2K Baud operation (auto-sensing & self-adjusting).
  • RS-485 / RS-422 auto-detection, no manual setting is required.
  • No software drivers, flow control, DIP switch or jumper settings required.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no flow control is required.
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Built-in 600W surge protection, 15kV static protection and circuit protection.
  • Built-in selectable 120Ω terminator for system reliability and easy installation.
  • Surface Mount Technology manufactured to RoHS and ISO-9001 standards.
  • Safety: Strictly certified by TUV (Cert No. SG-CE-100005; SG-FCC-100002).
  • 5-year manufacturer's warranty.

$97.95

In Stock


RPT-485_422-4

RS485 / RS422 Isolator / Repeater / Converter (Industrial)

  • Industrial RS485 / RS422 isolator / repeater / converter.
  • Isolates one group of RS485 / RS422 equipment from another.
  • Converts 2-wire RS485 to 4-wire RS422 and vice versa.
  • Extends RS485 or RS422's distance.
  • 2500V optical isolation.
  • 300 to 115.2K Baud operation (auto-sensing & self-adjusting).
  • RS-485 / RS-422 auto-detection, no software drivers or manual setting is required.
  • External 9-30VDC powered (included).
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no flow control is required.
  • Operating temperature: -40ºF to 185ºF (-40ºC to 85ºC).
  • Built-in 600W surge protection, 15kV static protection and circuit protection.
  • Direct DIN-Rail (Rack) or Wall / Panel mounting.
  • 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


HUB-485-4

Opto-Isolated RS485 Hub / Splitter (Industrial)

  • Industrial opto-isolated RS485 hub / splitter
  • Expands RS-485 networks by splitting one RS-485 network into four, thus making star-wiring possible for RS-485 networks.
  • Supports multi-drop RS485 networks (up to 512 [4x 128] nodes).
  • Multiple HUB-485-4 can be connected for expanding the RS485 system.
  • 2500V optical isolation.
  • The failure of any individual loop will not affect the others, making the RS-485 network more robust and reliable.
  • 300 to 115.2K Baud operation (auto-sensing & self-adjusting).
  • Direct DIN-Rail (Rack) or Wall / Panel mounting.
  • External 9 to 30VDC powered (included).
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • Data direction auto-turnaround, no software drivers or flow control is required.
  • No DIP switch or jumper settings needed.
  • 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.

$149.95

In Stock


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