TRAK-DTL ( Item #366)
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USED FOR
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Automate those nasty reverse loops with the TRAKDTL, this is useful in both conventional DC operation or carrier control. Use the TRAKDTL to automate the reverse polarity function required to operate an automatic backnforth. You can also use the TRAKDTL to automate the control of polarity reverse type switch machines. You might also want to sequence things in a certain manner, i.e. automate station stops so that every other train must stop at the station. Whatever you want to operate on an every other occurrence the TRAKDTL will do it for you! |
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The TRAK-DTL is a variation of current detection (TRAKDT) that includes a latching circuit to hold the relay position. As a result of this latching circuit, each time current flow is sensed by the detection coil, the TRAK-DTL changes the state of its relay. When current ceases to flow for a few seconds, the TRAKDTL is then ready for the next sense of current flow to change the state of its relay. This event is repeated again after a few seconds of no current flow occurs.
Since the relay has double pole, double throw (DPDT) contacts it can be wired as a polarity reversing switch. This allows the TRAK-DTL to be used to automate reversing loops or to provide a continuous "back and forth" operation on a single track such as for a trolley car or on a work bench, utilizing DC track power. When using carrier control you would reverse the track power of the reverse loop by setting up a section of track, say 1/3 of the loop, to pass through the sense coil. This way when the engine enters the "sensed section" the loops power would immediately reverse but the TRAKDTL will continue to sense current flow until the entire engine clears the section of track. The reason for 1/3 the loop is so that if the caboose has lights, and no other cars, you want the caboose to enter the "sensed section" before the engine leaves. This way you would not retrigger the TRAKDTL causing a double reverse. The TRAK-DTL can also be used to set up sequential functions by having the relay enable other devices when activated and disable these devices when relaxed. A typical way of forcing block or timed stops is to merely turn on a ballast lamp while passing the lamp power through the other detectors sense coils. All kinds of automation and wiring can be done with the TRAKDT family with simple wiring of the logic you want your trains to do! 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-DTL. For proper power supply refer to the 12VPS (Item 369). |
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Relay Contacts Electrical Diagram
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Relay contacts are used on most all of our Signaling Components. These are used since they are the most forgiving when mis-wiring occurs and they provide for electrical isolation of the load to the circuit.
When the relay is relaxed the "C" Common terminal is connected to the "N/C" Normally Closed. When the relay is activated the "C" Common terminal is then connected to the "N/O" Normally Open terminal. The relays used on our circuitry contain Double contact sets indicated by section A and section B. Remember a relay is nothing more than an electrically activated switch! |
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Wiring Diagram for Simple Automatic Back-N-Forth Operation
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