Isn’t the Control Unit a single point of failure?
Think of the Control Unit as box with a few dozen individual circuits. If one fails it doesn’t necessarily mean the others will fail. It is designed to fail “gracefully” in most failure modes. We’ve taken pains to isolate the processor from the switching circuits so that if the processor fails, the most likely thing that will happen is the devices stay in their currently-commanded state. In other words, anything that is on will stay on and anything that is off will stay off. The VP-200 Duo was created specifically to provide redundancy and to work with either single or dual bus electrical systems. You can place certain items (like comm/nav 1, PFD) on one Control Unit and other items (comm/nav 2, MFD) on the other Control Unit. Most EFISs and ADAHRS, for example, have dual power inputs allowing you to wire one power input to each Control Unit. The overall system architecture is designed so that failure of one major component (Display Unit, Control Unit, or Switch Panel) should not affec
Related Questions
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- Isn’t the Control Unit a single point of failure?
