Brake module BM1 In the simplest case, the track power is fed to the braking section in front of the signal via the BM1. If the signal to "Hp 0", produces the BM1 an asymmetry in the otherwise symmetrical digital voltage, which is detected by the decoders Gold and Silver series. The result is a gentle braking of the train to a stop. Does the train from the opposite direction, he drives simply because the asymmetry is detected directional. If the signal goes back to "Hp 1", the BM1 is bridged by the signal switch, the train accelerates with the acceleration set in the decoder.