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Compact DB9 RS232 female to RJ45 female adapter, small shell, passive wiring design

SMUGDESK

SMUGDESK DB9 RS232 Female to RJ45 Female Adapter

SKU CH-ZF0M-FKZKW

Converts a DB9 RS232 female port to RJ45 female for serial signal extension over CAT5 or CAT6 cable up to dozens of metres

  • Converts DB9 RS232 COM female to RJ45 female for serial signal extension over CAT5/CAT6 cable
  • Passive wiring design works without external power, plug-and-play with no driver required
  • Extends serial communication up to dozens of meters using standard CAT5, CAT5e or CAT6 LAN cables
  • Compact anti-interference shell ensures stable signal transmission for industrial serial equipment
  • Compatible with PLCs, barcode scanners, POS machines, industrial controllers, serial debuggers and access control devices with RS232

Serial Extension via Network Cable

The SMUGDESK DB9 RS232 Female to RJ45 Female Adapter converts a standard DB9 serial COM port to an RJ45 interface. It lets you transmit RS232 signals over ordinary CAT5, CAT5e or CAT6 cable for long-distance runs. No external power supply or driver is needed, making it a simple plug-and-play solution for industrial equipment.

Passive Wiring Distance Limits

Because the adapter uses a passive wiring design, the practical extension distance depends on cable quality and the serial device itself. The supplier notes reach of up to dozens of metres, but signal integrity will vary with baud rate and electromagnetic interference. Plan for shorter runs at higher speeds or in electrically noisy environments.

Check Your Port Gender and Pinout

Before ordering, confirm that your equipment presents a DB9 male connector and an RJ45 female jack for the network cable. Verify the RS232 pin assignment matches the adapter’s straight-through wiring, as some industrial gear uses non-standard pinouts. This unit is not suited for setups requiring active signal conversion or protocol translation.

How it compares

Measured against everything we stock in Network Adapters & RJ45 Plugs, at today’s prices. Recalculated every night.

Price $26.99
Pricier than about 65% of the 1,221 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Which version of the SMUGDESK DB9 RS232 Female to RJ45 Female Adapter should I choose for my setup?

This adapter is a single passive unit that converts a DB9 RS232 female port to an RJ45 female jack; there are no alternate versions or capacities to select.

What does the RS232 designation mean when I connect this adapter in a real machine?

It indicates the adapter passes standard RS232 serial signals through a CAT5 or CAT6 cable, letting you extend a COM port connection up to dozens of metres without external power.

What interface standard does the RJ45 side use and what distance does it support in practice?

The RJ45 female connector accepts ordinary CAT5, CAT5e or CAT6 LAN cable and carries the serial signal up to dozens of metres.

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