Which statement defines an incremental output?

• A. An incremental output is a digital output device used to position a bi-directional electric motor
• B. A flow switch senses flow
• C. A pseudopoint is a software point
• D. A current sensing relay detects current around a wire

Answer: (A)

An incremental output refers to a digital output that drives a motor in discrete steps, providing precise positional movement. The statement describes a digital output device used to position a bi-directional electric motor, which captures this idea: each pulse from the output steps the motor a fixed increment and the direction signal determines which way it moves. This is exactly how stepper or servo motor configurations use incremental steps to reach a target position.

The other statements describe sensing devices or software concepts rather than an output that moves a motor. A flow switch is a sensor that detects flow, not an output. A pseudopoint is a software notion, not a hardware output. A current sensing relay detects current around a wire, again a sensing element rather than a motor-driving output.