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Compact passive serial converter adapter with DB connectors

SMUGDESK

SMUGDESK RS232 to RS422 Serial Converter Adapter FDX FullDuplex Passive

SKU CH-7N57-PNNQA

Passive bidirectional adapter converts RS232 signals to RS422 full-duplex without external power, extending distance and noise immunity for industrial serial equipment

  • Passive fullduplex conversion between RS232 and RS422 serial signals
  • No external power supply needed, draws power from serial port lines
  • Supports longdistance RS422 transmission with improved antiinterference
  • Compact plugin design installs quickly without driver software or configuration
  • Bidirectional mutual conversion for PLC, industrial controller and serial device debugging

Passive RS232 to RS422 Converter

This passive adapter converts signals bidirectionally between RS232 and RS422 interfaces without external power. It draws operating current directly from the serial signal lines themselves. The unit supports full-duplex FDX transmission for simultaneous send and receive operation. It targets engineers and technicians integrating legacy serial equipment into industrial networks.

Extended Distance and Noise Immunity

Converting to RS422 enables longer cable runs and stronger resistance to electromagnetic interference compared to native RS232 connections. The adapter handles PLCs, industrial controllers and serial instruments in factory environments. Performance relies on adequate signal voltage from the host ports. It cannot compensate for weak drive strength or voltage drops on very long existing cables.

Driver-Free Plug-In Installation

The compact body plugs directly into the serial port for immediate use with no driver installation or configuration required. This saves setup time during field debugging and commissioning tasks. Serial cables are not included and must be sourced separately. Users must avoid connecting incompatible high-voltage signals that would damage the internal circuitry.

Highlights

  • Passive fullduplex conversion between RS232 and RS422 serial signals
  • No external power supply needed, draws power from serial port lines
  • Supports longdistance RS422 transmission with improved antiinterference
  • Compact plugin design installs quickly without driver software or configuration
  • Bidirectional mutual conversion for PLC, industrial controller and serial device debugging

Specifications

No published specifications for this item yet.

Questions about this item

Will this RS232 to RS422 converter work with my older RS232 serial port without an extra power supply?

Yes, the passive adapter draws its operating power directly from the RS232 signal lines so no external power supply is needed.

How can I verify the FDX fullduplex link is active after I plug it in?

Send data from the RS232 side while monitoring the RS422 port; simultaneous transmit and receive without errors confirms fullduplex operation.

Does the package include the serial cables for the 232 and 422 connections?

No, the box contains only the converter unit; you must supply the appropriate RS232 and RS422 cables separately.

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