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Space Shuttle Main Engine Controller, Block II |
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 The Honeywell Space Shuttle Main Engine Controller, Block II is an electronic control system for the Space Shuttle main engines.
One controller is mounted to each of the Space Shuttle's three main engines to monitor and maintain control of each engine's performance.
Each controller continuously checks its main engine system against its performance requirements and reports status information back to the orbiter's central computers.
Should any performance parameters fall outside the boundaries, it is the responsibility of the engine controllers to shut down the main engines and not permit a launch.
The Space Shuttle Main Engine Controller has performed without failure on every Shuttle flight.
Space Shuttle Main Engine Controller Features:  | Dual redundant controller with cross-strapped input/output electronics (allows for operational capability following one failure and a safe engine shutdown following a second failure) | | | Dual microprocessors and memories are implemented in a self-checking pair configuration for each channel | | | Built to survive severe temperature and vibration requirements |
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