“Simply put redundancy is not enough. Cirrus Perspective+incorporates redundancy, fault tolerance and robustness to provide the safest, most reliable, all-digital flight deck experience available. Each Cirrus aircraft is equipped with two alternators, two batteries and multiple electrical buses to isolate essential equipment and insure that power can be supplied to critical components even if multiple power source failures are experienced. Dual Air Data Attitude and Heading Reference Systems (ADAHRS) are also standard equipment, ensuring the autopilot is available even after the unlikely event of an ADAHRS failure, providing the ultimate in flight deck reliability.”
Reference: Cirrus Aircraft Corporation, The Cirrus Perspective+™ by Garmin, marketing brochure, p.13, 2017.