Specifications

TRAK-DTT
TRAcK DeTector with adjustable Timer
Add a station stop easily with the TRAK-DTT or use the TRAK-DTT as a "short block" detector with fixed timed
occupancy. Simply create an isolated section of track to trigger the TRAK-DTT, change a few wires, and you have it
(reference page 39 for wiring). Use the TRAK-DTT to operate your solenoid type switches or semaphores. You can
also use the TRAK-DTT as a momentary power supply for all your solenoid switch machines on your layout.
The TRAK-DTT combines two functions in one unit. There is a jumper selector located on the small circuit board
which also contains the time frame adjustment potentiometer. With the jumper selector removed the device
becomes a timer where, when current flow is sensed, the relay activates for a time frame and then relaxes. Inter-
rupting current flow for a few seconds resets the time circuit. With the jumper selector installed, the device functions
as an adjustable detector where the relay is activated for the duration of current flow, PLUS an adjustable time
period.
The TRAK-DTT is a variation of current detection that provides for event timing. The TRAK-DTT has two modes of
operation:
1 - used as a TIMER. When current flow is sensed in the detection coil, the relay is activated for
a time period (user adjustable) and then relaxes for the duration of current flow. Once current
flow has ceased for a few seconds the time circuit resets and can then be reactivated.
2 - used as a DETECTOR - TIME ADJUSTABLE. As with the TRAK-DT, when current flow is
sensed in the detection coil, the relay is activated. However, with the TRAK-DTT in this
mode, the relay is held activated for an adjustable time period after current ceases to flow. In
other words the TRAK-DTT activates for the duration of current flow PLUS the adjustable
time period.
The time period of the TRAK-DTT is adjustable from a momentary relay activation as minimum to a maximum of
approximately 75 seconds. Longer time is available as a custom order. The momentary function is very useful in
operating solenoid type switch machines or semaphores. The RED LED provides for an easy visual indication for
activation. Custom units can be ordered to yield up to 5 minutes of timing.
It is also necessary to provide power for the electronics. In order for the electronics to function properly it is essential
that a "regulated" power supply of 12 VDC be employed. This 12 VDC power is only for the electronics and has
absolutely nothing to do with track power. Failure to use a "regulated" 12 VDC can cause erratic functioning or
actual destruction of the TRAK-DT which is not covered under warranty. The 12VPS (item 369, pg 35) is ideal for
this function.
38
Item # 565
wire passes
through
hole in
sense coil
time adj.
jumper selector
RED LED
activation
indicator.