How the 21MTC adapter board works
The adapter board is wired into the locomotive and the decoder is simply plugged on. This lets you use almost all of the decoder’s functions via the interface without soldering on the decoder itself – a later replacement or conversion becomes much easier. The board is suitable for decoders from many manufacturers, for example ESU, Uhlenbrock, Lenz or D&H.
To keep the form factor as small as possible, our adapter boards do without series resistors for LEDs and without an amplifier circuit. You will find suitable series resistors in our shop; for heavier loads, most manufacturers offer decoders with amplified function outputs (AUX).
What else you need
- a decoder with a 21MTC interface (not included in the scope of delivery)
- for LEDs: suitable 0603 SMD Resistors as series resistors
- for lighting: LEDs
Note: The decoder shown in some of the pictures is for illustration only and is not included in the scope of delivery.
Frequently asked questions
Do I need series resistors for LEDs?
Yes. For space reasons, the adapter board has no series resistors of its own. Suitable 0603 SMD resistors are available in our shop.
Which decoders fit?
All decoders with a 21MTC interface, for example from ESU, Uhlenbrock, Lenz or D&H.
Where can I find the pad assignment?
The exact assignment of the solder pads and installation notes are in the installation manual on the Downloads tab.
