TraK-DTT2 (Track-DeTector Timer type 2)

Use the Trak-DTT2 (Track-DeTector Timer) block detector to switch on or off anything around your layout for a duration of 1-45 seconds. Trak-DTT2 current detector activates its on-board relay the first time current is detected. The relay relaxes after the second time current is detected. With the jumper off, it will activate the first time current is detected with an adjustable time between 1-45 seconds regardless if current is still flowing or not. The second time current is detected, the relay will deactivate. The timer mode of operation is selectable. What's different about this unit from the Trak-DTT is that current has to be sensed and then not sensed and then again sensed and not sensed in order to complete it's cycle. Hence the "2" after it's name since it takes two sequences of current sensing. Current is detected by passing a wire through the sense coil on the board.

Add a station stop easily to your model train layout with the Trak-DTT2 or use the Trak-DTT2 as an alternate type of operation with timing. Simply create an isolated section of track to trigger the Trak-DTT2, change a few wires, and you have it. Use the Trak-DTT2 to operate timed station stops. The TrakDTT combines two functions in one unit.

The small block detector circuit board contains a jumper for dual functionality (see below) and a time frame adjustment dial.

Dual Functionality - Jumper Settings

With the jumper selector installed, the timed block detector will activate upon sensing current and will stay engaged until the second sequence of detection is accomplished. The timer portion will only start after the second sequence of current is no longer sensed. With the jumper selector removed, the timed block detector will activate upon sensing current and start the timer immediately.

Power Requirements

Basic Wiring

Relay Not Activated

When the relay is not activated, the right and middle contacts are connected and the left most connector is connected to nothing.

Relay Activated

When the relay is activated, the left and middle contacts are connected and the right contact is connected to nothing.

Terminal Overview

1. Decide on a section of track which will trigger the detector. Isolate one rail (either rail on two rail, center for three rail) for the length of the section of track by adding a small gap in the rail.
2. Route a new power lead for that section of track, passing it through the sense coil on the Trak-DTT2 board.
3. Connect the power leads to the Trak-DTT2. At this point the detector is ready to use.
4. For more detailed wiring guides, please reference the Dallee Wiring Guides.