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TraK-DTT2 (Track-DeTector Timer type 2) - Dallee Electronics

TraK-DTT2 (Track-DeTector Timer type 2)

$34.95
Item Number: #368

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.
Current Sensed -> Relay Activated -> Current Removed -> time w/o current sensing -> Current Sensed -> Current Removed -> Timer Started -> Timer Ended -> Relay Deactivated -> Reset (cycle completed)
With the jumper selector removed, the timed block detector will activate upon sensing current and start the timer immediately.
Current Sensed -> Relay Activated -> Timer Started -> Timer Ended -> Relay Deactivated -> Current Removed -> Current Sensed -> Current Removed -> Reset (cycle completed)


Power Requirements

All Dallee current detectors require a regulated 12 volt DC power supply, such as the 12VPS. We recommend the 12VPS to power up to ten detectors. A 12 volt regulated DC source must be used as other unregulated power supplies can destroy the electronics on board.


Basic Wiring

Relay Not Activated

Model Train Block Occupancy Detector Relaxed
When the relay is not activated, the right and middle contacts are connected and the left most connector is connected to nothing.

Relay Activated

Model Train Block Occupancy Detector 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.
Trak-DTT Basic Installation Instructions


Technical Specifications

Item Number 368
Instructions Trak-DTT Current Occupancy Detector Timer #368 Full Instructions
Automatic Timed Station Stops #683 Full Instructions
Automatic Timed Station Stops With Momentum #686 Full Instructions
Other Uses and Operations (See Wiring Guide)
Relay Style Double Pole Double Throw (DPDT)
Timer Duration 0-45 Seconds (Longer Times Available Upon Request)
Relay Current Handling 5 Amps
Power Input (For Electronics on Detector Board) 12 Volts Regulated DC



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