I&#x27;m a tad late, but I&#x27;m curious about where you said<p>&gt; <i>they use different software and hardware</i><p>Does this mean different architectures? If it does my respect for the redundant-hardware approach just went through the window.<p>Also, how is the watchdog redundant? I can&#x27;t imagine there&#x27;s only one; how does this work? Are both watchdogs somehow wired in parallel, are they cross-connected to each other, or...?