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DB9 Serial over Cat5e Extender Balun
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DB9 Serial over Cat5e Extender Balun

Plug and Play solution to extend a Serial signal up to 3300 feet.

Item # 47-400-014
Sale Price $83.99
1 - 2 3 - 5 6 - 7 8 - 9 10+
$83.99 $79.99 $76.79 $73.59 $70.49

Extend your Serial signal over 3300 feet away, using one Cat5e or Cat6 cable. This Serial extender comes with two adapters for a complete setup. One adapter (local) connects the PC, while the other (remote) connects to the device. The Serial over Cat5 Extender works with RS-232, RS-422, and RS-485 signals. Use where plenum rated cable is required to keep cost down.


  • Extend Serial signals 3300 feet over one UTP Cat5e/6 cable
  • Features an aluminum body for heat dissipation
  • Powered Transmitter and Receiver to extend serial distances in excess of 3000 feet
  • Works with RS-232, RS-422, and RS-485 signals
REVIEW SUMMARY for DB9 Serial over Cat5e Extender Balun
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Q: What is a balun?

A: A balun is a small transformer which converts an audio or video signal from unbalanced to balanced and vice versa (hence the term "bal*un"). By doing so, baluns make the necessary impedance adjustment for audio-visual signal transmission between different wiring systems.

Q: Why use a Balun?

A: Sending your audio, video, and data signals over a Cat5e or Cat6 gives you three big advantages. The first one is that it allows you to carry your signal over an extremely long distance, overcoming distance limits of some technologies. The second advantage is that it saves you money. Cat5e/6 is affordable, especially in plenum rated spaces which is why it’s the cable of choice for media extension. Thirdly Cat5e/6 cable is easier to run in small conduit and tight in-wall installations.

Q: What is the picture quality when using a balun?

A: The picture will be the as good as the source signal. Baluns are designed to maintain signal quality.

Q: Do I need any special tools to install a balun system?

A: No, all of our baluns are plug-and-play. Simply connect both baluns to your equipment and run the cable.

Compatible with:

  • Dial-up modems
  • GPS receivers (typically NMEA 0183 at 4,800 bit/s)
  • Bar code scanners and other point of sale devices
  • LED and LCD text displays
  • Flat-screen (LCD and Plasma) monitors to control screen functions by external computer, other AV components or remotes
  • Test and measuring equipment such as digital multimeters and weighing systems
  • Some CNC controllers
  • Uninterruptible power supply
  • Stenography or Stenotype machines
  • Software debuggers that run on a second computer
  • Industrial field buses
  • Printers
  • Computer terminal, teletype
  • Older digital cameras
  • Networking (Macintosh AppleTalk using RS-422 at 230.4 kbit/s)
  • Serial mouse
  • Older GSM mobile phones
  • Some Telescopes

  • "Quick turnaround time, exactly the product I needed, and a good selection of delivery options. What more to you look for from an online delivery?"

    - Jim Mills
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