True or false: An operational diagram can include both input and output signals related to a device.

An operational diagram is a visual representation that illustrates how a device or system behaves, showcasing both the input and output signals associated with its operation. This type of diagram is essential for understanding how data enters the system, how it is processed, and what results are produced. By including both input and output signals, the operational diagram provides a comprehensive view of the interactions within the device, allowing engineers and technicians to analyze performance, troubleshoot issues, and ensure proper functionality.

In this context, recognizing that operational diagrams serve to depict all functional aspects of a device, including both inputs that trigger actions and outputs that result from those actions, affirmatively supports the statement that operational diagrams can encompass both types of signals. This holistic view is invaluable in electrical engineering and system design.