A train enters a track block with an isolated outside-rail and isolated power connections. The train coasts to a stop, waits for a time, then proceeds.

Three-Rail Innovations' Two Relay Controller is connected to stop the train when it enters the track block, and then turn on power to the block after a selected time.

The following drawing shows the 2RC configured to turn off track power when a train enters a track block, then turn power on after a wait time.

A train can enter the wait-block from either direction. When a train enters the block, Relay-1 is turned ON, turning center-rail power for the block OFF. After a time delay defined with the jumpers, Relay-1 is turned OFF and power to the block is restored. The train proceeds.

A track block with an isolated outside-rail and isolated center- rail at least as long as the coasting distance for the train is constructed.

The 2RC is jumpered for the One-Time-ON vertical jumper feature set. Jumpers are used to set the desired wait time (3 to 25 seconds).

Connections are wired as follows:

• The 2RC is powered with a 12 - 14 volt transformer.
• The isolated outside-rail track blocks are powered with an 8 - 20 volt transformer connected to track common and the "B" terminals of both outside-rail inputs.
• The isolated outside-rail track block is connected to the Input-1-A terminal. An electrical switch can also be installed so the Stop and Wait feature can be turned on and off.
• Track/train center rail power is connected to the NC (Normally Closed) terminals of Relay-1.
• Power for the Input-1 track block is connected to the C (Common) terminal for Relay-1.

The Input-2/Relay-2 combination can also be used, with appropriate wiring changes.

This example controls train movement by turning track center-rail power on or off. The engine's E-Unit, or equivalent, must be set so removing and restoring train power will not change the train's direction.

Want to add some stop-and-go action to your train layout? You need Three-Rail Innovations' Two Relay Controller.

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