What are AI, AO, DI, DO signals

Question

Accepted Answer

AI, AO, DI, DO signals are types of signals used in instrumentation engineering.

AI stands for Analog Input and refers to signals that are continuous and can take any value within a range.
AO stands for Analog Output and refers to signals that are continuous and can be controlled to produce a specific output value.
DI stands for Digital Input and refers to signals that are discrete and can only take on two values, typically 0 or 1.
DO stands for Digital Output and refers to signals that are discrete and can be controlled to produce a specific output value, typically 0 or 1.
Examples of AI signals include temperature sensors and pressure sensors.
Examples of AO signals include control valves and variable frequency drives.
Examples of DI signals include limit switches and push buttons.
Examples of DO signals include solenoid valves and motor starters.

Top Sri Sai Power and Equipments Senior Instrument Engineer interview questions & answers