Occupancy detector 3R - 8

Cards that senses the presence of a train on the track.
Use with track of type 3R (e.g. Märklin), where one rail is cut between section and connected to the detector card.

The card has sockets for eight tracks.

The outputs on the card are connected with cable to e.g. the decoder Signal10, which can handle 16 inputs, i.e. 2 of these cards.