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ith the use of the Sensor Signal developed by Train Tech you can easily add automatic signalling into your layout in seconds. The signals work by detecting a locomotive, or full train passing by it using a very small infrared sensor built in to the signal base. As soon as the locomotive has passed the sensor the signal changes to red and will stay red for about seven seconds to let the train clear the block. It then reverts back to yellow for a further seven seconds; then reverts back to green.
If more than one signal is being used in a section, such as a distant and home combination, the two signals can be linked by a single wire. This enables a signal sequence to be activated when the train passes the first signal. As the locomotive passes the first sensor the signal changes to red (as before) but as the train passes the second sensor the previous signal reverts to yellow and the additional signal changes to red which gives fully automatic block signalling, just like the real railway.
If you have multiple aspect signals (3 and 4) the yellows are also incorporated into this sequence. These signals are easy to set up and only require a single wire to link them all together to the sequence.
These signals can be used on both DC and DCC layouts using two methods of installation.
MEASUREMENTS
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Train Tech Sensor Signal (LH Feather) 3‑Aspect Home Distant – part number TTSS3L
The device adds automatic signalling to a model railway using a small infrared sensor built into the base. When a locomotive or full train passes the sensor, the signal turns red and remains red for about seven seconds, then changes to yellow for a further seven seconds before returning to green.
Multiple signals, such as a distant and home combination, can be linked with a single wire. The first sensor triggers a red aspect; as the train reaches the second sensor the first signal reverts to yellow and the second signal turns red, providing fully automatic block signalling. The same wiring method supports 3‑ and 4‑aspect signals, with the yellow aspects incorporated into the sequence.
The signals are compatible with both DC and DCC layouts and can be installed by either of two methods specified by the manufacturer. The signal height is 76 mm.