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 D/A" represent? Illustration EL-0095

Correct Answer: Option B — It receives digital outputs from the CPU and converts these to analog signals for transmission to analog actuators.

Digital-to-Analog (D/A) converters are essential in direct digital control systems. They receive discrete binary data from the CPU and transform these values into continuous analog voltage or current signals, which are necessary to drive analog actuators like proportional valves or variable frequency drives in shipboard machinery.