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Introduction to Industry 4.0 · Module 02: data collection and connectivity · Lesson
Temperature and pressure can take any value inside a range; finished parts and cycles are counted. They are different in nature and they ask for different signals. This lesson covers the field standards and what picking the wrong one costs you.
In this lesson
- Continuous quantities and discrete counts, and how that decides the sensor
- The field standards: 0 to 10 V, 0 to 20 mA, 4 to 20 mA, and the 24 V of a digital signal
- Why 4 to 20 mA became the standard: at 0 mA the cable broke, which is not the same as zero