Define failsafe design and give an example using a sensor input.

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Multiple Choice

Define failsafe design and give an example using a sensor input.

Failsafe design means that when a fault occurs, the system moves to a safe condition by default, rather than continuing operation or acting unpredictably. With a sensor input, this often means the control logic treats a fault as if a hazardous condition were present and forces a safe state to occur. For example, a safety interlock on a guarded machine can open when a fault is detected, which stops the machinery. This ensures hazardous motion is prevented even if the sensor or wiring fails. If the system were to accelerate under fault, do nothing, or enter a random state, it could create a dangerous situation. The fail-safe approach prioritizes safety by defaulting to a safe shutdown when anything abnormal is detected.

Failsafe design means that when a fault occurs, the system moves to a safe condition by default, rather than continuing operation or acting unpredictably. With a sensor input, this often means the control logic treats a fault as if a hazardous condition were present and forces a safe state to occur. For example, a safety interlock on a guarded machine can open when a fault is detected, which stops the machinery. This ensures hazardous motion is prevented even if the sensor or wiring fails.

If the system were to accelerate under fault, do nothing, or enter a random state, it could create a dangerous situation. The fail-safe approach prioritizes safety by defaulting to a safe shutdown when anything abnormal is detected.

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