AO stands for which term?

AO stands for which term?

• A. Automatic Output
• B. Analog Output
• C. Analog Input
• D. Active Output

Answer: (B)

A controller’s Analog Output is the continuous signal it sends to an actuator to set a variable level, like valve position or fan speed. This distinguishes it from sensing signals (Analog Input) and from on/off signals (Digital Output). In practice, analog outputs are often voltage ranges such as 0–10 V or current ranges like 4–20 mA, which allow smooth, proportional control rather than just a binary state. That’s why AO stands for Analog Output. Automatic Output and Active Output aren’t standard terms for this context, and Analog Input refers to the signals the controller reads, not what it sends.

A controller’s Analog Output is the continuous signal it sends to an actuator to set a variable level, like valve position or fan speed. This distinguishes it from sensing signals (Analog Input) and from on/off signals (Digital Output). In practice, analog outputs are often voltage ranges such as 0–10 V or current ranges like 4–20 mA, which allow smooth, proportional control rather than just a binary state. That’s why AO stands for Analog Output. Automatic Output and Active Output aren’t standard terms for this context, and Analog Input refers to the signals the controller reads, not what it sends.