Add a station stop easily with the TRAK-DTT2 or use the TRAK-DTT2 as an alternating detector with fixed timed occupancy. Simply create an isolated section of track to trigger the TRAK-DTT2, change a few wires, and you have it.

The TRAK-DTT2 combines three functions in one unit. The input circuitry has a latch function incorporated into it. Therefore the timer function is only activated on every other sense of current flow. The first time current flows, the timer is activated. The second time current flows the input to the timer is "reset" for the next current activation. There is a jumper selector located and time frame adjustment potentiometer on the circuit board as well. With the jumper selector removed (which is the configuration for most all STATION STOP applications) the device becomes a timer where, when current flow is sensed, the relay activates for a time frame and then relaxes. Interrupting 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 a time period or for the duration of current flow, whichever is longer. This only occurs every other time current flows in the sense coil, as explained previously.

The TRAK-DTT2 is a variation of the TRAK-DT (#365) current detection and the TRAK-DTT (#565) that provides for event timing. The TRAK-DTT2 has two main 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 needs to have current flow again to reset and can then be reactivated again after a pause in current flow.

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-DTT2 in this mode, the relay is held activated for the entire duration until current ceases to flow and then starts again. Then after the second on/off of current flow cycle, the adjustable time period is activated and the output relay will relax according to the time setting.

The time period of the TRAK-DTT2 is adjustable from a momentary relay activation as minimum to a maximum of approximately 75 seconds. The momentary function is very useful in operating solenoid type switch machines or semaphores but with it's input latch, only every other sense will activate the timer function. 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 on catalog page 37) is ideal for this function.

STATION STOP wiring for multiple stops within a loop of track can be made by simply cutting the track and making more stop sections wired as the previous stop section.