As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "ANALOG A/D" represent? EL-0095

Correct Answer: Option A — It receives analog outputs from the analog device sensors and converts these to digital signals for CPU processing.

Analog-to-Digital (A/D) converters are essential for interfacing analog sensors, such as pressure transducers or thermocouples, with the CPU. They sample the continuous voltage or current signals from these devices and convert them into digital binary values that the computer can process for monitoring and control logic.