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Your cart is empty. Connector A: DB9 9 Pin Female
Connector B: RJ45 8 Pin Female
Data cabling transmission signal up to 20M
Compatible with Standard 9 Pin D-sub RS-232 Devices e.g. computer laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc.
Please be Noted:
DB9 serial RJ45 adapter is only an adapter for extending RS232 serial data (max. distance 65ft), not a console adapter.
Usually this adapter needs to be used in pairs.
DB9 serial data is transmitted over the network cable. To use this pair of adapters, you need to connect them with a cat5e or CAT6 cable.
What’s Included
1x DB9 Female to RJ45 Female Serial Adapter
Zarkness
2025-08-26 18:36:26
Fir those whe refuse to throw out old gadgets, this is for you. Sometmes the new talks with the old, sometimes they don't
maus
2025-07-10 17:02:06
Worked but didn't help
Randy Salge
2025-07-09 18:48:19
The pinout is direct from the DB9 to the RJ45: 1 to 1, 2 to 2, ..... ,7 to 7, 8 to 8, and 9 isn't hooked up.If you are using one of these adapters at either end of an ethernet cable, then it will work perfectly fine (within serial cable length limits anyway). Or if your are rolling your own device and can make sure to match the pinout, you are good as well.But, if you are trying to use one of these as a console cable (to a Cisco or whatever) or as an EIA/TIA-561 compatible cable, then it won't work properly as the pinout is different. Unless of course you can modify your device to change the pinout.While the product itself is 5 stars and works great, the incorrect information deducts a star. If the listing was updated to show the correct pinout, I would update my rating no problem.
Optimus Prime Member
2025-05-26 17:42:22
The description says "RS-232". The pins are wired straight through, pin 1 to pin 1 through pin 8 to pin 8, this is not wired for RS-232. While the form and build are great I need what they described, an RS-232 adapter, sorry but this goes back to Amazon .
RT
2025-05-05 18:25:21
It's an adapter. Cheaply made.
TJL
2025-04-26 18:26:57
No CD or DVD with appropriate drivers were included. Finding the right ones on the web is hit-and-miss. Not good.I have frequent difficulty getting my amateur radio frequency information from the radio to my logging software via a USB-to-Serial port comnnection. Today I tried a RJ-45-to-DB9 serial connector instead of the USB-to-Serial port cable. The requirement to find the proper Windows 10 64-bit driver for either of these cables is hit-and-miss with insufficient instructions and guidance. Where can I find the FTDI drivers for download and how do I determine which specific driver is appropriate for my Windows 10/11 64-bit laptops?
Jayson Chu
2025-04-17 18:39:17
Good Item works great
Ignacio
2025-03-10 17:07:24
You can not use this adapter with a USB to RJ45 serial adapter. The pin out on the picture description is wrong. This adapter is meant to be used with an Ethernet cable and another one of these on the other end.
Kevin Chen
2025-02-14 17:21:14
Attached it to Ethernet console but doesn’t work
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