Audible warning and LED status indication combined in a single device

EAO has expanded the Series 57 LED indicators to include a multi-tone warning indicator (MTWI). It is designed to meet the needs of applications such as passenger access to trains, emergency call systems and access control systems.

Safety is a priority when it comes to opening and closing doors in public transportation. This also has an impact on accessibility issues, whether for facilitating passenger entry on trains, trams, buses or for public use emergency call and call-for-aid systems. Users can depend on both the audible and the visual warnings provided by the Series 57 multi-tone warning indicators (MTWI).

The Series 57 MTWI combines two rail industry established HMI functions into one singular compact device – the Series 56 multi-tone sound module and the Series 57 warning indicator. This provides additional advantages and enhances safety in public transportation, especially for people with visual impairments. Passengers are intuitively warned about potential dangers thanks to the loud, audible warning signal and the LED status indicator visible from any angle.

When a train door is opened, green LEDs steadily illuminate or flash (must be controlled externally). At the same time, the door opening audio signal will sound to provide an additional acoustic warning. As soon as the door closes, the red LEDs illuminate or flash and the ‘door closing’ signal can be heard clearly.

Choices in LED colours and combinations are available and can be tailored to meet the specific application requirements (for example TSI PRM). Additionally, for emergency call system announcements, a passive speaker module variation is available that can be connected to an external signal source and amplifier.