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RJ45 to RS232 Cable, DB9 9-Pin Serial Port Female&Male to RJ45 Female Cat5/6 Ethernet LAN Console（15CM/6Inch） 2Pack
zdyCGTime

zdyCGTime RJ45 to RS232 Cable

Bottom line: The zdyCGTime RJ45 to RS232 Cable: Sends RS232 over Cat5/6 for runs up to 15 meters; main trade-off: non-standard pinout, not EIA/TIA-561 — incompatible with other adapters.

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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

  • ✓ Sends RS232 over Cat5/6 for runs up to 15 meters
  • ✓ Passive design needs no external power
  • ✓ Thin RJ45 cabling replaces bulky DB9 runs, easier to route

Cons

  • ✗ Non-standard pinout, not EIA/TIA-561 — incompatible with other adapters
  • ✗ Works only as a matched pair; a single unit is useless
  • ✗ Just 15cm/6in pigtails — you supply the Ethernet run between them
  • ✗ Manufacturer caps recommended distance at 15 meters

Manufacturer description

Please note: This is not EIA/TIA-561 or similar common pinout. These units can only be used when paired together. They cannot be used as you would any other similar adapter.Can only be used in pairs to work (2 at the same time), can not be used alone, please read the instructions carefully before buying "Product Instructions:1.DB9 port, which expands display devices through network cables2. This switch cable can be used to switch to the RS232 serial port. The DB9 9-pin serial port is used to connect a host computer or various monitors.3. The network cable can be connected to the network…

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SpecPicks Verdict

SpecPicks scored zdyCGTime RJ45 to RS232 Cable using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. zdyCGTime'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

  • Please note: This is not EIA/TIA-561 or similar common pinout. These units can only be used when paired together. They cannot be used as you would any other similar adapter.Size:(15CM/6Inch) Color: Black Features:（2 per pack) DB9 Female to RJ45 Female cable and DB9 Male to RJ45 female cable
  • The RS232 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.
  • Save money by using a CAT5 cable versus a DB9 cable.Makes running cables easier due to RJ45 being thinner.
  • Please note:Can only be used in pairs to work (2 at the same time), can not be used alone, please read the instructions carefully before buyingThis cable can be converted to DB9 9-Pin serial port, DB9 port used to connect to the computer host or a variety of monitors

Full Specifications

Brand‎zdyCGTime
Color‎BLACK
Package Dimensions‎6.57 x 4.21 x 0.98 inches
Standing screen display size‎7 Inches
Full listing titleRJ45 to RS232 Cable, DB9 9-Pin Serial Port Female&Male to RJ45 Female Cat5/6 Ethernet LAN Console（15CM/6Inch） 2Pack

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RJ45 to RS232 Cable, DB9 9-Pin Serial Port Female&Male to RJ45 Female Cat5/6 Ethernet LAN Console（15CM/6Inch） 2Pack 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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RJ45 to RS232 Cable, DB9 9-Pin Serial Port Female&Male to RJ45 Female Cat5/6 Ethernet LAN Console（15CM/6Inch） 2Pack
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