Train Tech TTSS4L

Sensor Signal (LH Feather) 3 Aspect Distant

Manufacturer catalogue image - please note that pre-release images may be CAD renders or CGI images rather than photographs

Manufacturer description

With 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 yellow and will stay yellow for about seven seconds to let the train clear the block. It 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 yellow (as before) but as the train passes the second sensor the previous signal reverts to green and the additional signal changes to yellow 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.

On DCC layouts you just need to connect the base prongs to the underside of the rails (like a power clip) this then enables them to be given a DCC address or run them automatically. To install these signals onto an existing layout you can cut the prongs off at the dotted lines and solder two wires onto the back of the PCB and run the wires to the power Bus Wires.

On DC layouts you need to cut the prongs at the dotted lines and solder two wires onto the base and connect them to a smooth 12V DC power supply. If you do not already have a suitable smooth DC supply then we recommend the GMC-WM4 12V DC Wall Mounted Transformer, which gives great value for money and 1.25 amps of power, enough to power about 20 signals per supply.

The Feather on this signal can be controlled separately by programming it to a different address or by connecting it to a point motor with auxiliary terminals of DC use.

On both DC or DCC these sensor signals can be linked to the Mimic Switches for a manual override to yellow, control of a route indication and LEDs indicating signal colour and track occupation.

MEASUREMENTS

• HEIGHT 76mm

Catalogue listing

Train Tech Sensor Signal (LH Feather) 3‑Aspect Distant – part number TTSS4L

The Signal uses a small infrared sensor in its base to detect a locomotive or full train as it passes. When the train clears the sensor the aspect changes from green to yellow for approximately seven seconds before returning to green, providing automatic block signalling.

When two signals are used together, such as a distant and home signal, a single linking wire allows the first sensor to set its aspect to yellow and, after the train passes the second sensor, the first signal returns to green while the second changes to yellow. The same principle applies to 3‑ and 4‑aspect signals, with the yellow aspects incorporated into the sequence.

The units can be fitted to both DC and DCC layouts. On DCC the base prongs connect to the rail underside and the signal can receive a DCC address or operate automatically; the prongs may be removed and two wires soldered to the PCB for bus wiring. On DC the prongs are removed, two wires are soldered to the base and a smooth 12 V DC supply is required – the recommended supply is the GMC‑WM4 12 V wall‑mounted transformer (1.25 A), sufficient for about twenty signals.

The feather head can be programmed to a separate address or driven from a point motor using the auxiliary DC terminals. Both DC and DCC versions can be linked to Mimic Switches to allow manual override to yellow, route indication and LED indicators of signal colour and track occupation.

MEASUREMENT: height 76 mm.