RS232 / RS485 / RS422 Opto Isolators / Isolated Converters

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 industrial-grade 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.

SAFETY

Safety

WORLD-CLASS TESTING LABS

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

QUALITY

Quality

ISO 9001 STANDARDS

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

WARRANTY

Warranty

100% SATISFACTION

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


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