The Digitrax TL1 is a single-function DCC decoder with integrated transponding — perfect for adding a controllable function output (lights, smoke, or other accessory) to a non-decoder locomotive while also giving you Digitrax's position-tracking feature on the same board. At just 1.0" × 0.4" × 0.16", it fits in cabooses, passenger cars, lightboards, and even N-scale shells where space is tight.
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What is "transponding"?
Transponding is Digitrax's position-tracking technology — the TL1 reports its location back to your command station through compatible Digitrax detection sections, so you can see exactly where a transponding-equipped car or locomotive is on your layout. It's not the same as RailCom but serves a similar role.
Does this drive a motor?
No — the TL1 is a function-only decoder. It controls ONE output (typically a light or accessory). For motor control you need a full mobile decoder like the Digitrax DH126MT, DZ126, or any other mobile decoder.
What can I wire to the function output?
LEDs (with appropriate resistor), incandescent bulbs, smoke units, sound modules, ditch lights, mars lights, or any DC-powered accessory drawing under 1A continuous. FX3 effects let you simulate prototypical lighting patterns.
Will it work with any DCC system?
Yes — the TL1 follows NMRA DCC standards and runs on any DCC command station. Transponding readback, however, requires a Digitrax LocoNet system with appropriate detection sections (BDL168, BDL16, etc.).
