The terminal loop module KSM-4 offers the polarity within the terminal loop in dependence on the position of the switch so that no short circuit can occur while passing over the separation point. Between the soft, the inside of the terminal loop are transition areas with integrated track-busy indicators arranged ("sensor tracks"). As soon as a train out of the terminal loop in one of the two transition areas entrance, the switch for the exit is switched on and the polarity within the terminal loop.The switch must be connected to the KSM-4 and is automatically for the exit of the train out of the terminal loop. The KSM-4 has two switching inputs for connection of a push-button (or a comparable circuit), so that the switch from the outside. You can before entering a direction within the terminal loop can be specified.This text is machine translated.