Esu offers a Platform for 21-pin MTC interface under part number 51967, which can be installed on locomotives to connect a 21-pin decoder.
Introduction to the manufacturer ESU:
Model train manufacturer ESU specialises in designing products derived from model railroading. The brand offers a wide range of electronic accessories for digital systems (adapters, power supplies, decoders, cables, digital control units, etc.). ESU also designs some railway equipment (locomotives, carriages, wagons, etc.) in HO 1/87, N 1/160, TT 1/120 and other scales.
