Question 49General Subjects - Assistant Engineer

The correct answer is B) It receives digital outputs from the CPU and converts these to analog signals for transmission to analog actuators. The "ANALOG D/A" block in the illustrated diagram represents a digital-to-analog converter (D/A or DAC) that takes the digital outputs from the central processing unit (CPU) and converts them into analog signals. These analog signals are then transmitted to analog actuators or control devices, which require an analog input to operate. The other answer choices are incorrect because A) describes a function of a digital output module, C) describes an analog-to-digital converter (which would convert analog signals to digital), and D) describes the function of an analog output module, not a digital-to-analog converter.