Introduction to Signals and Sensors

A Dotric Station Blue signals and sensors board can control up to 10 signals and 10 sensors.

A signal is a 2 wire bi colour red and green LED. Amber is generated by the control board by mixing red and green.

A sensor is an infra red detector or a reed relay or any other device that is able to sink a few milliamps when a train is detected. 12 volt terminals are provided to supply electronic circuitry such as infra red detectors.
The pictures below show an installed infra red detector.

Signals and sensors are added to existing or new points maps using the Dotric Station Blue map editor.

Once a signal has been added to a points map, the colour of the signal may be changed by performing a mouse click on the signal.

Once a sensor has been added to a points map it will be seen to change from green to red as a train passes over it, providing a visual on screen indication of the train location.

Signals may be set up to operate automatically. A signal may be set up to change colour when an event or a combination of several events occurs. An event can be a train detected by a sensor, points changing direction or another signal changing