RS232 / RS485 / RS422 / TTL Serial Converters

Rated to perform at temperatures between -40°F and 185°F (-40°C and 85°C), our rugged industrial-grade RS232 / RS485 / RS422 / TTL serial converters are almost indestructible. These industry-proven serial converter products support multi-drop RS485 / RS422 networks and come with 600W surge protection, 15KV ESD protection, selectable end-of-line terminators, and optional 2500V opto-isolation circuitry, which ensure crisp data signals without interference for all types of installations.

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-485A-1

Slim RS232 to RS485 Converter (Industrial / Port-Powered)

  • Slim industrial port-powered RS232 to RS485 converter.
  • Port-powered, no external power or RTS, DTR required.
  • Very high power efficiency: Less than 8mA of power consumption.
  • Designed for quick installation and space-restricted applications.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Converts RS232 to 2-wire RS485 and vice versa.
  • Supports multi-drop RS485 networks (up to 128 nodes)
  • 300 to 115.2K 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).
  • Data direction auto-turnaround, no software drivers or flow control required.
  • 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.

$24.95

In Stock


CVT-485-1

RS232 to RS485 Converter / Adapter (Industrial / Port-Powered)

  • Industrial port-powered RS232 to RS485 / RS485 to RS232 converter / adapter.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Converts RS232 to 2-wire RS485 and vice versa.
  • Supports multi-drop RS485 networks (up to 128 nodes)
  • 300 to 115.2K 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 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.

$32.95

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-422-1

RS232 to RS422 Converter / Adapter (Industrial / Port-Powered)

  • Industrial port-powered RS232 to RS422 / RS422 to RS232 converter / adapter.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Converts RS232 to 4-wire RS485 or RS422 and vice versa.
  • Supports multi-drop RS422 networks (up to 128 nodes).
  • 300 to 115.2K Baud operation (auto-sensing & self-adjusting).
  • Plug and play (hot-pluggable, data format auto-sensing & self-adjusting).
  • No software drivers or 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.
  • Accepts external 5VDC regulated power if the port-power is insufficient.
  • 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.

$32.95

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_422-1

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

  • Industrial port-powered RS232 to RS485 / RS422 converter.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Converts RS232 to 2-wire RS485, 4-wire RS485 or 4-wire RS422 and vice versa.
  • Supports multi-drop RS485 / RS422 networks (up to 128 nodes).
  • 300 to 115.2K 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).
  • Data direction auto-turnaround, no flow control or software driver 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.

$45.95

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_422-1(25)

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

  • 25-pin industrial port-powered RS232 to RS485 / RS422 converter.
  • Converts 25-pin RS232 to 2-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.
  • Supports multi-drop RS485 / RS422 networks (up to 128 nodes).
  • 300 to 115.2K 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.

$45.95

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


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


TTL-232-1

RS232 to TTL Converter / Adapter (Industrial / Port-Powered)

  • Industrial port-powered RS232 to TTL / TTL to RS232 converter / adapter.
  • Converts RS232 to 5V TTL / CMOS and vice versa.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 300 to 115.2K 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, flow control, 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.

$32.95

In Stock


TTL33-232-1

RS232 to TTL 3.3V Converter (Industrial / Port-Powered)

  • Industrial port-powered RS232 to TTL 3.3V converter.
  • Converts RS232 to 3.3V TTL and vice versa.
  • Port-powered, no external power or RTS, DTR required.
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 300 to 115.2K 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, flow control, 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.

$32.95

In Stock


TTL-485-2

RS485 to TTL Converter / Adapter (Industrial)

  • Industrial RS485 to TTL / TTL to RS485 converter / adapter.
  • Converts RS485 to 5V TTL and vice versa.
  • External 5VDC powered (included).
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • Supports multi-drop RS485 networks (up to 128 nodes).
  • 300 to 115.2K 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).
  • 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.
  • 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.

$42.95

In Stock


TTL-485_422-2

RS422 / RS485 to TTL Converter / TTL Repeater (Industrial)

  • Industrial RS485 / RS422 to TTL converter / TTL repeater.
  • Converts 2-wire RS485 or 4-wire RS422 to 5V TTL and vice versa.
  • Ideal for extending the full-duplex unbalanced TTL distance (up to 4000ft/1.2km).
  • External 5VDC powered (included).
  • Industrial grade enclosed in a rugged, rustless ABS housing.
  • 300 to 115.2K 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).
  • 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.
  • 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