EAO, the expert for Human Machine Interfaces, expands the success­ful Series 56 switch range with a Multi-Tone Sound Module (MTSM).This is a versatile device which can be programmed to emit a clear warning sound adapted to a particular operating environment.

Depending on the version of sound module, either three or five different tone sequences can be played in any sequence at different volumes, durations and intervals to create a unique sound. The three-tone Sound Module is, among other uses, suited for any applications that must comply with Directive TSI PRM 2008 / 164 / EC. It also comes pre-programmed with a set of standard tones commonly used in pub­lic transport applications.