LoDi-KSM Reverse Loop Module for Digital Railways

The LoDi-KSM is a simple reverse loop module for the digital model railway. The data format is irrelevant.

No contact track is required. Switching takes place in a flash. The module and the connected tracks are also protected against short circuits. The LoDi-KSM is RailCom-capable and forwards the locomotive data to the feedback device via the reversing loop.

In addition, the KSM has a dip switch with which the polarity of the reversing loop can be switched via an externally connected switching decoder.

What is a Reverse loop.

Why do you need a reverse loop module on a model railway layout? 

Basically, reversing loop modules are only required for the 2-pipe system. 

The reversing loop module automatically switches a reversing loop.

A reverse loop is created, as you can see in the picture, when the power supply is crossed when the train is reversing or turning in a section of a circle when it returns to the track.

Here you can now see that the red line crosses the current via the blue line.

This is then called a loop.

In order to avoid a short circuit here, you need a  special switch or relay that reverses the polarity of the supply voltage of the track in the reversing loop.