LED technology railway signals

The 1st generation LED units (available since 2001) and the LED Signals EU (available since 2006) are officially approved for use in Austria, Slovakia and Germany. They use high intensity LEDs.

The excellent visibility of the LED Signal EU is the result of a combination of high power LED as a central light source and a special lens system.

In combination with the highest safety class level SIL 4, Zelisko LED technology meets the highest demands of modern railway systems.

In the meantime more than 35.000 pcs are currently in operation or being tested by the ÖBB or private operators in Austria, as well as by many other international railway companies. The LED Signal EU meets the requirements for the Deutsche Bahn LED and has been formally approved by the EBA as well as by the Slovakian Railway.


  • According to CENELEC EN 50 129 safety integrity level SIL4
  • Complete Assessment Report by TÜV
  • EBA certified
  • 7 / 4 High- Power LED
  • No preventive maintenance required – high availability
  • High optical efficiency
  • Power curve programmable (resistive characteristic)
  • AC & DC variants
  • Reproduction of light bulb behaviour
  • Independently adjustable light intensity for day or night
  • Compatible to commonly used interlocking systems
  • Current-voltage monitoring of LED
  • Serial connection and blinking operation
  • Pre-warning of failure of one LED depending on variants
  • Safe shutdown at fault
  • Protection class IP54 (IP65 on request)
  • Connection via plug or fixed cable

Signalling Systems

Phone: +43 2236 409 2648
Fax: +43 2236 409 2279