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XMSJSIY DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45 CAT5 CAT6 Ethernet LAN Extend Adapter Cable-2pcs (2-Cable)
XMSJSIY

XMSJSIY DB9 RS232 to RJ45 Extender

Bottom line: The XMSJSIY DB9 RS232 to RJ45 Extender: Two adapters per pack for the paired setup RS232-over-Cat5 runs actually require; main trade-off: vendor recommends 1-15m in practice despite the 100m Cat5/Cat6 claim.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Two adapters per pack for the paired setup RS232-over-Cat5 runs actually require
  • ✓ Passive design needs no external power or drivers on either end
  • ✓ Runs RS232 over standard Cat5/Cat6 UTP up to 100m per the listing spec
  • ✓ DB9 male plus DB9 female shells cover male-to-female pairings out of the box

Cons

  • ✗ Vendor recommends 1-15m in practice despite the 100m Cat5/Cat6 claim
  • ✗ Passes RS232 signals only, no TCP/IP conversion despite the network-interface wording
  • ✗ Male-to-male or female-to-female pairs need a gender changer this kit omits
  • ✗ No shielding spec listed, so noisy industrial runs may need shielded cable

Manufacturer description

DB9 Serial RS232 Port to RJ45 Cat5/Cat6 adapter, Interface: DB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.Compatible with desktop computer, digital machine tools, PDA, bar code and other standard DB9 serial devices

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SpecPicks Verdict

SpecPicks scored XMSJSIY DB9 RS232 to RJ45 Extender using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. XMSJSIY's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • DB9 to RJ45 adapter: used for TCP/IP network interface with serial port network function, support serial data and network data bidirectional transparent transmission.Compatible with desktop computer, digital machine tools, PDA, bar code and other standard DB9 serial devices, stable and reliable performance, support maximum distance 66ft.
  • The DB9 RS232 COM signal is transmitted over the network cable,When using this adapter, it is recommended to use within a distance of 1-15 meters.Requires no external power, easy and Convenient to use.
  • High quality alloy transmission port reduce the transmission impedance and interference,environmentally friendly PVC material, super wear-resistant, Integral injection molding. improve data transmission rate and transmission quality.
  • Interface: DB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.
  • Special Note: Usually this product needs to be used in pairs, specifically divided into: female to female, male to female, male to male three kinds of situations. Can also be used alone.

Full Specifications

BrandXMSJSIY
Color2-Cable
Model755641611589
InterfaceDB9 Male to RJ45 female; 9pin/8P8C.the adapter run RS232 data over long distances (up to 100m) using UTP Cat 5/ Cat6 cable to bridge the gap.
Cable TypeEthernet
Item ShapeRound
Unit Count2 Count
Connector TypeRJ45
Number of Pins9
Outer MaterialPolyvinyl Chloride (PVC)
Number of Items2
Special FeatureData Transfer
Connector GenderFemale-to-Female, Male-to-Female, Male-to-Male
Compatible DevicesPC
Indoor Outdoor UsageIndoor, Outdoor
Ethernet Cable CategoryCat 6
Recommended Uses For ProductConnecting serial devices to a network, extending serial device communication up to 15 meters
Other Special Features of the ProductData Transfer
Full listing titleXMSJSIY DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45 CAT5 CAT6 Ethernet LAN Extend Adapter Cable-2pcs (2-Cable)

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XMSJSIY DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45 CAT5 CAT6 Ethernet LAN Extend Adapter Cable-2pcs (2-Cable) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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XMSJSIY DB9 RS232 to RJ45 Extender, DB9 9-Pin Serial Port Female&Male to RJ45 CAT5 CAT6 Ethernet LAN Extend Adapter Cable-2pcs (2-Cable)
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