The LED 2010 G colour light signal lamp is based on the EU signal lamp, which is approved in Austria and is well proven in service. It has undergone further development to meet the requirements of the German and international markets. In this process, the requirements of DB Netz AG's specifications for LED colour light signal lamp have been fulfilled to their full extent.
The colour light signal lamp has a short- and long-distance visibility characteristic and can be used in both main and distant signals.
The signal lamp is designed as a single system, i.e. a single signal lamp is used for each spot of light required by an open-line signal. This guarantees the greatest possible flexibility in the constructional design of the signal screen, in order to correspond with the requirements of different signalling systems.
The LED circuit board and all of the control electronics for a lighting point are accommodated in a robust, weatherproof plastic housing behind the optical system. To minimize phantom light effects, the front pane is tilted slightly upwards and has a hood on top of it.
The optical system of the signal lamp is designed to cover the usual track radii.
The signal lamp is intended to operate on two nominal voltages: 12V AC for daytime operation and 8V AC for night operation, and the use of LEDs provides high availability. Each of the LEDs used is individually powered and monitored.
Electrical interface and safety behaviour
The electrical interface has a dummy load, which makes it compatible with the lamp operating circuits incorporating current monitoring and cold-filament test that are used with electronic interlockings.
Any failure within the signal lamp that causes limitation of the required lighting characteristics is identified by the monitoring electronics, resulting in the switching off of the lighting point and the corresponding interruption of the signal circuit. This ensures disclosure via lamp current monitoring in the interlocking.
Additionally, in the event of the failure of an individual LED - while the requirements regarding the level of illumination are still met - a diagnostic message can be issued via a separate output.