Electronic Products & Technology

Tri-colour HMI features multi-status indication

Stephen Law   

Circuit Protection Electronics switch

EAO Series 57 with a new tri-colour illumination version Human Machine Interfaces (HMIs) for door opening pushbuttons in public transport that allows for mutli-visual feedback indications. Unit permits a third colour that can now be displayed in the outer feedback ring by the addition of two new LEDs. Indicators, along with the standard two feedback rings of individual illumination, make it possible to indicate additional warnings such as ‘door fault’ or a ‘door closing and opening’ by means of independent, flashing LEDs. Products provide extra-large Ø 74mm operating area.

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