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Small rectangular passive converter, DB9 plug on one side, green terminal block on the other, matte black plastic casing

SMUGDESK

SMUGDESK Passive DB9 RS232 to RS485 Converter

SKU CH-XZ22-J15DA

Passive DB9 converter changes RS232 signals to RS485 differential output using port power only, with screw terminals for short-range industrial wiring

  • Passive operation draws power from the RS232 port
  • Standard DB9 9-pin connector plugs straight into COM serial ports
  • Converts RS232 signal to RS485 differential output for industrial use
  • Terminal block A/B wiring enables quick field installation
  • Designed for short-range links with PLCs meters and serial devices

Passive RS232 to RS485 Converter

This passive adapter converts RS232 signals to RS485 differential signals using only power from the serial port. It targets engineers and technicians who need a simple interface for industrial serial devices without adding a power supply.

Shortdistance transmission only

The passive design limits reliable operation to short cable runs because it draws operating power from the RS232 signal itself. Performance degrades when the transmission distance becomes too long, so it is not suited for extended industrial networks.

DB9 plug with terminal block

A standard DB9 9pin connector mates directly with a PC or device COM port while the A/B terminal block allows quick field wiring. The compact module fits tight cabinets or desktop setups and requires no driver installation.

Highlights

  • Passive operation draws power from the RS232 port
  • Standard DB9 9-pin connector plugs straight into COM serial ports
  • Converts RS232 signal to RS485 differential output for industrial use
  • Terminal block A/B wiring enables quick field installation
  • Designed for short-range links with PLCs meters and serial devices

Specifications

No published specifications for this item yet.

Questions about this item

Should I choose a passive or externally powered RS232 to RS485 converter?

Choose this passive model when you can accept shortdistance runs and want a single module that draws power from the RS232 port itself, avoiding extra cables and power supplies.

What does the RS232 to RS485 conversion actually do for my serial link?

It changes the singleended RS232 signal from your COM port into a differential RS485 signal that resists electrical noise on the A/B twisted pair.

Which serial standard does the DB9 side follow, and what distance limit applies?

The DB9 side follows standard RS232 signalling, and the passive design caps reliable use to shortdistance wiring only.

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