Federal Signal Corporation TM11A PowerTone Card, model TM11A, is a PowerTone control card designed to output a Temporal Slow Whoop tone. It is listed as Series A2 in Federal Signal’s PowerTone lineup, identifying its specific tonal capability within the TM11A family. This card serves as a tone-generation module within Federal Signal’s PowerTone ecosystem, distinguishing its Temporal Slow Whoop output by the TM11A designation.
