Demystifying Industry 4.0

A: 0 V versus 24 V tells you nothing if the copper path is wrong. Point‑to‑point continuity, including shields, is the only step that survives missing datasheets because it fixes topology errors before any energy is applied. Powering cabinets or simulating signals first can mask crossed pairs or floating shields that later show up as noise during SAT.

A: The boundary here is response time versus process ramp rate. A SIL rating assumes the logic executes; a network reboot can stretch the response past the pressure rise time, leaving overpressure credible. The other effects confuse cyber or maintenance issues with direct cause‑consequence physics.

A: The hard number is the required risk reduction factor, not operator preference. IEC 61511 credits only functions with bounded response time and proven failure rates. Alarms don't meet that threshold even if they're logged, visualized, and trend nicely in a smart factory stack.

A: The limiting value is zero g if the sensor is loose or misoriented. Mechanical fit and orientation come first because bad mounting corrupts every downstream digital step. Time sync, analytics, and certificates all assume the raw signal is physically valid.