Product: PR3

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Summary: The PR3, which was superseded by the PR3 Xtra, is a device that allows downloading of sound files or reflashing the firmware of a Digitrax sound decoder. These devices have been superseded by the PR4. It can also program most multifunction decoders.

Digitrax PR3 / PR3Xtra

The PR3 and PR3Xtra have been superseded by the PR4

See LocoNet Page.


The PR3 is a Digitrax LocoNet device which enables programming of multifunction decoders, as well as updating firmware in multifunction decoders and throttles. It also functions as a bridge between USB and LocoNet, allowing a computer to be connected to your LocoNet.

PR3 Xtra

The PR3 Xtra was a PR3 packaged with a power supply. Otherwise it is identical.


This is the initial program loader which is used with the PR3/PR3 to update the firmware in Digitrax products. Included with the SoundLoader software. Requires a computer running MSwindows.

Product Description


  • Digitrax SoundLoader compatible. Programs Digitrax sound projects in to SFX decoders
  • Programs CVs for most DCC multifunction decoders
  • LocoNet MS100 mode
  • Mac OS with JMRI
  • Windows XP, Vista, 2000, 7, and 8
  • Requires a programming track.

It also acts as a bridge between LocoNet and a computer. It uses a USB 2.0 interface to a computer.

For better results when programming, an 18V power supply is recommended.

Digitrax PR3 Webpage


Installation Instructions

Mac OS X 10.8: PR3 with OS X

Power Supply

The original PR3 did not come with a power supply, Digitrax recommended a maximum supply voltage of 20VDC. With the introduction of the PR3 Xtra, the voltage recommendation was lowered to 15VDC, in line with their included power supply.