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Compact DB9 male to terminal block serial adapter in black plastic housing

SMUGDESK

SMUGDESK RS232 to RS422 Serial Adapter DB9Pin Passive Data Converter

SKU CH-5322-T71ZH

Passive bidirectional RS232 to RS422 converter with built-in filtering, DB9 and terminal block connections, supporting up to 1200m transmission without external power

  • Passive design draws power from serial signals, eliminating external adapters
  • Bidirectional transparent conversion between RS232 and RS422 for stable full-duplex communication
  • Built-in filter circuit suppresses EMI and surge noise for reliable industrial operation
  • Supports baud rates from 300 to 115200bps with up to 1200m transmission distance
  • DB9 male and terminal block interfaces connect PLCs, inverters and serial instruments

Industrial Serial Bridge

This passive converter translates between RS232 and RS422 protocols for bidirectional full‑duplex communication. It targets engineers and technicians integrating PLCs, inverters, sensors or other serial instruments into industrial networks. No external power supply is required, simplifying cabinet wiring.

Signal Integrity Upgrade

A built‑in multi‑stage filter circuit suppresses electromagnetic interference, static discharge and transient surges common near motors and high‑voltage gear. The passive design harvests power from serial handshake lines, so the adapter adds no extra cabling or failure points to the installation.

Field‑Ready Connectivity

The unit combines a standard DB9 male port with a screw terminal block for flexible field wiring. It supports common baud rates from 300 to 115200 and extends reliable transmission up to 1200 metres. Driver‑free operation works immediately with any device exposing standard RS232 or RS422 interfaces.

Highlights

  • Passive design draws power from serial signals, eliminating external adapters
  • Bidirectional transparent conversion between RS232 and RS422 for stable full-duplex communication
  • Built-in filter circuit suppresses EMI and surge noise for reliable industrial operation
  • Supports baud rates from 300 to 115200bps with up to 1200m transmission distance
  • DB9 male and terminal block interfaces connect PLCs, inverters and serial instruments

Specifications

No published specifications for this item yet.

Questions about this item

Will the DB9 or terminal block connectors wear out with repeated mating cycles?

The DB9 male and screw terminal block are standard industrial connectors rated for many insertion cycles; no scheduled replacement is required under normal use.

What limits the maximum cable length when the adapter runs at 115200 bps?

The 1200 metre range applies under proper wiring; higher baud rates and cable capacitance reduce the practical distance before signal integrity degrades.

Does the passive design cause the unit to heat up during continuous all-day operation?

Power is drawn from the serial handshake lines only, so dissipation is negligible and the converter stays at ambient temperature even with constant data flow.

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